/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:03:52,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:03:52,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:03:52,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 23:03:52,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 23:03:52,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 23:03:52,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 23:03:52,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 23:03:52,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 23:03:52,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 23:03:52,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 23:03:52,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 23:03:52,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:03:52,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:03:52,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:03:52,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:03:52,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:03:52,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:03:52,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:03:52,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:03:52,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:03:52,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:03:52,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:03:52,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:03:52,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 23:03:52,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 23:03:52,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 23:03:52,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 23:03:52,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 23:03:52,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 23:03:52,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 23:03:52,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 23:03:52,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 23:03:52,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 23:03:52,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 23:03:52,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 23:03:52,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 23:03:52,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 23:03:52,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 23:03:52,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 23:03:52,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 23:03:52,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:03:52,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:03:52,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:03:52,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:03:52,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:03:52,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:03:52,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:03:52,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:03:52,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:03:52,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:03:52,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:03:52,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:03:52,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:03:52,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:03:52,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:03:52,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:03:52,660 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:03:52,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:03:52,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:03:52,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:03:52,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:03:52,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:03:52,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:03:52,662 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:03:53,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:03:53,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:03:53,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:03:53,054 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:03:53,059 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:03:53,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2021-02-23 23:03:53,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2586af2b6/a0d0058fb12e4ca3bd01100b2c67f96c/FLAG678ab31ef [2021-02-23 23:03:53,892 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:03:53,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2021-02-23 23:03:53,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2586af2b6/a0d0058fb12e4ca3bd01100b2c67f96c/FLAG678ab31ef [2021-02-23 23:03:54,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2586af2b6/a0d0058fb12e4ca3bd01100b2c67f96c [2021-02-23 23:03:54,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:03:54,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:03:54,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:03:54,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:03:54,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:03:54,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:03:54" (1/1) ... [2021-02-23 23:03:54,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4334e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54, skipping insertion in model container [2021-02-23 23:03:54,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:03:54" (1/1) ... [2021-02-23 23:03:54,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:03:54,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:03:54,512 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i[23408,23421] [2021-02-23 23:03:54,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:03:54,534 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:03:54,618 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i[23408,23421] [2021-02-23 23:03:54,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:03:54,692 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:03:54,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54 WrapperNode [2021-02-23 23:03:54,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:03:54,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:03:54,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:03:54,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:03:54,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54" (1/1) ... [2021-02-23 23:03:54,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54" (1/1) ... [2021-02-23 23:03:54,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54" (1/1) ... [2021-02-23 23:03:54,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54" (1/1) ... [2021-02-23 23:03:54,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54" (1/1) ... [2021-02-23 23:03:54,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54" (1/1) ... [2021-02-23 23:03:54,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54" (1/1) ... [2021-02-23 23:03:54,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:03:54,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:03:54,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:03:54,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:03:54,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:03:54,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:03:54,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:03:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:03:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 23:03:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 23:03:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-02-23 23:03:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-02-23 23:03:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-02-23 23:03:54,903 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-23 23:03:54,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:03:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:03:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:03:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 23:03:54,904 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 23:03:54,904 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:03:54,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:03:54,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:03:54,904 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 23:03:54,904 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 23:03:54,905 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 23:03:54,905 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 23:03:54,905 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 23:03:54,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 23:03:54,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 23:03:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 23:03:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 23:03:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 23:03:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 23:03:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 23:03:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 23:03:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 23:03:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 23:03:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 23:03:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 23:03:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 23:03:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-02-23 23:03:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-02-23 23:03:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-02-23 23:03:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 23:03:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 23:03:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 23:03:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 23:03:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 23:03:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 23:03:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 23:03:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 23:03:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 23:03:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 23:03:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 23:03:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 23:03:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 23:03:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 23:03:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 23:03:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 23:03:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 23:03:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 23:03:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 23:03:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 23:03:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 23:03:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 23:03:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 23:03:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 23:03:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 23:03:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 23:03:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 23:03:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 23:03:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 23:03:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 23:03:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 23:03:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 23:03:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 23:03:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 23:03:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 23:03:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 23:03:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 23:03:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 23:03:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 23:03:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 23:03:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 23:03:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 23:03:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 23:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 23:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 23:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 23:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 23:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 23:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 23:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 23:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 23:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 23:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 23:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 23:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 23:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 23:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 23:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 23:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 23:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 23:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 23:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 23:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 23:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 23:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 23:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 23:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 23:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 23:03:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 23:03:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 23:03:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 23:03:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 23:03:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 23:03:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 23:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 23:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 23:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 23:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 23:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 23:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 23:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 23:03:54,921 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 23:03:54,921 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 23:03:54,921 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 23:03:54,921 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 23:03:54,921 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-23 23:03:54,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:03:54,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 23:03:54,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:03:54,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 23:03:54,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 23:03:54,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:03:54,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:03:54,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:03:54,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:03:54,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:03:55,246 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-23 23:03:55,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:03:55,497 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-23 23:03:55,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:03:55 BoogieIcfgContainer [2021-02-23 23:03:55,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:03:55,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:03:55,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:03:55,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:03:55,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:03:54" (1/3) ... [2021-02-23 23:03:55,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4d93be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:03:55, skipping insertion in model container [2021-02-23 23:03:55,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:03:54" (2/3) ... [2021-02-23 23:03:55,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4d93be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:03:55, skipping insertion in model container [2021-02-23 23:03:55,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:03:55" (3/3) ... [2021-02-23 23:03:55,509 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2021-02-23 23:03:55,516 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:03:55,521 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:03:55,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:03:55,565 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:03:55,566 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:03:55,566 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:03:55,566 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:03:55,566 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:03:55,566 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:03:55,567 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:03:55,567 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:03:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2021-02-23 23:03:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 23:03:55,594 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:03:55,595 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] [2021-02-23 23:03:55,595 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:03:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:03:55,602 INFO L82 PathProgramCache]: Analyzing trace with hash -461049234, now seen corresponding path program 1 times [2021-02-23 23:03:55,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:03:55,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991840983] [2021-02-23 23:03:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:03:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:55,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:55,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:55,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:55,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:55,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:03:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:55,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:55,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:03:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991840983] [2021-02-23 23:03:55,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:03:55,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 23:03:55,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105042075] [2021-02-23 23:03:55,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 23:03:55,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:03:55,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 23:03:55,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 23:03:55,902 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2021-02-23 23:03:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:03:56,087 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2021-02-23 23:03:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 23:03:56,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-02-23 23:03:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:03:56,098 INFO L225 Difference]: With dead ends: 115 [2021-02-23 23:03:56,099 INFO L226 Difference]: Without dead ends: 61 [2021-02-23 23:03:56,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 23:03:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-23 23:03:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-02-23 23:03:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-23 23:03:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-02-23 23:03:56,152 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 26 [2021-02-23 23:03:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:03:56,153 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-02-23 23:03:56,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 23:03:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-02-23 23:03:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-23 23:03:56,155 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:03:56,155 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] [2021-02-23 23:03:56,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:03:56,156 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:03:56,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:03:56,160 INFO L82 PathProgramCache]: Analyzing trace with hash 39557614, now seen corresponding path program 1 times [2021-02-23 23:03:56,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:03:56,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632767051] [2021-02-23 23:03:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:03:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:56,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:56,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:56,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:56,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:56,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:03:56,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:56,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:03:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:56,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:03:56,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632767051] [2021-02-23 23:03:56,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:03:56,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:03:56,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576449239] [2021-02-23 23:03:56,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:03:56,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:03:56,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:03:56,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:03:56,375 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 7 states. [2021-02-23 23:03:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:03:56,699 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2021-02-23 23:03:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 23:03:56,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2021-02-23 23:03:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:03:56,702 INFO L225 Difference]: With dead ends: 138 [2021-02-23 23:03:56,703 INFO L226 Difference]: Without dead ends: 132 [2021-02-23 23:03:56,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 23:03:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-23 23:03:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 74. [2021-02-23 23:03:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-23 23:03:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-02-23 23:03:56,722 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 34 [2021-02-23 23:03:56,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:03:56,723 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-02-23 23:03:56,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:03:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-02-23 23:03:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 23:03:56,725 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:03:56,725 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:03:56,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:03:56,726 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:03:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:03:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1904476042, now seen corresponding path program 1 times [2021-02-23 23:03:56,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:03:56,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61112809] [2021-02-23 23:03:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:03:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:56,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:56,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:56,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:56,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:56,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:03:56,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:56,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:03:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:56,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:56,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:03:56,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61112809] [2021-02-23 23:03:56,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:03:56,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:03:56,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402837094] [2021-02-23 23:03:56,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:03:56,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:03:56,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:03:56,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:03:56,950 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 7 states. [2021-02-23 23:03:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:03:57,208 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2021-02-23 23:03:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 23:03:57,209 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2021-02-23 23:03:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:03:57,211 INFO L225 Difference]: With dead ends: 141 [2021-02-23 23:03:57,211 INFO L226 Difference]: Without dead ends: 122 [2021-02-23 23:03:57,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 23:03:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-02-23 23:03:57,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 74. [2021-02-23 23:03:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-23 23:03:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2021-02-23 23:03:57,224 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 40 [2021-02-23 23:03:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:03:57,224 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2021-02-23 23:03:57,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:03:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2021-02-23 23:03:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 23:03:57,226 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:03:57,227 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:03:57,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:03:57,227 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:03:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:03:57,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1353809478, now seen corresponding path program 1 times [2021-02-23 23:03:57,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:03:57,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925107357] [2021-02-23 23:03:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:03:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:57,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:57,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:57,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:57,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:57,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:03:57,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:57,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:03:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:57,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:03:57,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925107357] [2021-02-23 23:03:57,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:03:57,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:03:57,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350924926] [2021-02-23 23:03:57,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:03:57,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:03:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:03:57,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:03:57,338 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 7 states. [2021-02-23 23:03:57,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:03:57,545 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2021-02-23 23:03:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 23:03:57,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2021-02-23 23:03:57,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:03:57,547 INFO L225 Difference]: With dead ends: 119 [2021-02-23 23:03:57,547 INFO L226 Difference]: Without dead ends: 99 [2021-02-23 23:03:57,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 23:03:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-23 23:03:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2021-02-23 23:03:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-23 23:03:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-02-23 23:03:57,559 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 40 [2021-02-23 23:03:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:03:57,560 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-02-23 23:03:57,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:03:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-02-23 23:03:57,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 23:03:57,563 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:03:57,563 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:03:57,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:03:57,564 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:03:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:03:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1775920989, now seen corresponding path program 1 times [2021-02-23 23:03:57,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:03:57,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917476432] [2021-02-23 23:03:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:03:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:57,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:57,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:03:57,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:03:57,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:03:57,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:03:57,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:03:57,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:03:57,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 23:03:57,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:03:57,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:03:57,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:57,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:57,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:03:57,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:57,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:03:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:57,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:57,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:03:57,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917476432] [2021-02-23 23:03:57,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:03:57,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 23:03:57,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083511836] [2021-02-23 23:03:57,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 23:03:57,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:03:57,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 23:03:57,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:03:57,944 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 15 states. [2021-02-23 23:03:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:03:58,750 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-02-23 23:03:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 23:03:58,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2021-02-23 23:03:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:03:58,753 INFO L225 Difference]: With dead ends: 148 [2021-02-23 23:03:58,753 INFO L226 Difference]: Without dead ends: 135 [2021-02-23 23:03:58,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-02-23 23:03:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-23 23:03:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 82. [2021-02-23 23:03:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-23 23:03:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-02-23 23:03:58,771 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 45 [2021-02-23 23:03:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:03:58,771 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-02-23 23:03:58,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 23:03:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-02-23 23:03:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 23:03:58,773 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:03:58,773 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:03:58,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 23:03:58,774 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:03:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:03:58,774 INFO L82 PathProgramCache]: Analyzing trace with hash -76304527, now seen corresponding path program 1 times [2021-02-23 23:03:58,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:03:58,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507873901] [2021-02-23 23:03:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:03:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:58,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:58,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:03:58,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:03:58,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:03:58,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:03:58,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:03:58,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:03:58,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 23:03:58,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:03:58,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:03:58,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:58,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:58,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:03:59,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:59,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:03:59,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:59,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:59,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:03:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:03:59,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:03:59,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:03:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:03:59,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507873901] [2021-02-23 23:03:59,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:03:59,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 23:03:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018327486] [2021-02-23 23:03:59,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 23:03:59,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:03:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 23:03:59,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:03:59,084 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 15 states. [2021-02-23 23:03:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:03:59,980 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2021-02-23 23:03:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 23:03:59,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2021-02-23 23:03:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:03:59,982 INFO L225 Difference]: With dead ends: 164 [2021-02-23 23:03:59,982 INFO L226 Difference]: Without dead ends: 158 [2021-02-23 23:03:59,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-02-23 23:03:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-23 23:04:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 104. [2021-02-23 23:04:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-02-23 23:04:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2021-02-23 23:04:00,035 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 45 [2021-02-23 23:04:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:00,041 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2021-02-23 23:04:00,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 23:04:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2021-02-23 23:04:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 23:04:00,043 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:00,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:00,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 23:04:00,043 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1024942955, now seen corresponding path program 1 times [2021-02-23 23:04:00,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:00,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132154787] [2021-02-23 23:04:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:00,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:00,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:00,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:00,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:00,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:00,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:00,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 23:04:00,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,306 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:00,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:00,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:04:00,379 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:04:00,381 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:04:00,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:00,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:00,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:00,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:00,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:00,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:00,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:00,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132154787] [2021-02-23 23:04:00,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:00,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-23 23:04:00,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793498955] [2021-02-23 23:04:00,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 23:04:00,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:00,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 23:04:00,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-02-23 23:04:00,562 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 16 states. [2021-02-23 23:04:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:01,691 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2021-02-23 23:04:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 23:04:01,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2021-02-23 23:04:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:01,694 INFO L225 Difference]: With dead ends: 169 [2021-02-23 23:04:01,694 INFO L226 Difference]: Without dead ends: 163 [2021-02-23 23:04:01,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-02-23 23:04:01,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-23 23:04:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 108. [2021-02-23 23:04:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-02-23 23:04:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2021-02-23 23:04:01,727 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 51 [2021-02-23 23:04:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:01,727 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2021-02-23 23:04:01,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 23:04:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2021-02-23 23:04:01,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 23:04:01,731 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:01,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:01,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 23:04:01,731 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1245751225, now seen corresponding path program 1 times [2021-02-23 23:04:01,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:01,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810220752] [2021-02-23 23:04:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:01,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:01,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:04:01,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:04:01,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:04:01,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:04:01,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:04:01,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:04:01,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 23:04:01,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:04:01,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:01,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:01,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:01,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:01,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:01,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:01,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:01,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:01,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810220752] [2021-02-23 23:04:01,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:01,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 23:04:01,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561124623] [2021-02-23 23:04:01,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 23:04:01,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:01,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 23:04:01,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:04:01,977 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 15 states. [2021-02-23 23:04:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:02,741 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2021-02-23 23:04:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 23:04:02,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2021-02-23 23:04:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:02,743 INFO L225 Difference]: With dead ends: 176 [2021-02-23 23:04:02,743 INFO L226 Difference]: Without dead ends: 157 [2021-02-23 23:04:02,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-02-23 23:04:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-23 23:04:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-02-23 23:04:02,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-02-23 23:04:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2021-02-23 23:04:02,765 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 51 [2021-02-23 23:04:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:02,766 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2021-02-23 23:04:02,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 23:04:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2021-02-23 23:04:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 23:04:02,767 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:02,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:02,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 23:04:02,767 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:02,768 INFO L82 PathProgramCache]: Analyzing trace with hash 209069449, now seen corresponding path program 1 times [2021-02-23 23:04:02,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:02,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741079727] [2021-02-23 23:04:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:02,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:02,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:02,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:02,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:02,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:02,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:02,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 23:04:02,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:02,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:02,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:02,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:04:02,990 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:04:02,992 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:04:03,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:03,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:03,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:03,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:03,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:03,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:03,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:03,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:03,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:03,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:03,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:03,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741079727] [2021-02-23 23:04:03,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:03,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-23 23:04:03,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922478547] [2021-02-23 23:04:03,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 23:04:03,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:03,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 23:04:03,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-02-23 23:04:03,159 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 16 states. [2021-02-23 23:04:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:04,288 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2021-02-23 23:04:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 23:04:04,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2021-02-23 23:04:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:04,290 INFO L225 Difference]: With dead ends: 173 [2021-02-23 23:04:04,290 INFO L226 Difference]: Without dead ends: 167 [2021-02-23 23:04:04,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-02-23 23:04:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-23 23:04:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 117. [2021-02-23 23:04:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-02-23 23:04:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2021-02-23 23:04:04,320 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 51 [2021-02-23 23:04:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:04,320 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2021-02-23 23:04:04,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 23:04:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2021-02-23 23:04:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-23 23:04:04,322 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:04,322 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:04,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 23:04:04,322 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:04,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1385511218, now seen corresponding path program 2 times [2021-02-23 23:04:04,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:04,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40830015] [2021-02-23 23:04:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:04,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:04,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:04,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:04,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:04,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:04,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:04:04,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:04:04,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:04:04,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:04,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:04:04,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:04,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:04,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:04,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 23:04:04,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:04:04,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:04:04,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:04,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:04,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:04:04,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:04,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:04,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:04,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:04,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:04,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40830015] [2021-02-23 23:04:04,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:04,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 23:04:04,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637912489] [2021-02-23 23:04:04,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 23:04:04,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:04,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 23:04:04,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-23 23:04:04,872 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand 22 states. [2021-02-23 23:04:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:07,013 INFO L93 Difference]: Finished difference Result 198 states and 210 transitions. [2021-02-23 23:04:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-23 23:04:07,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2021-02-23 23:04:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:07,015 INFO L225 Difference]: With dead ends: 198 [2021-02-23 23:04:07,015 INFO L226 Difference]: Without dead ends: 192 [2021-02-23 23:04:07,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=530, Invalid=2226, Unknown=0, NotChecked=0, Total=2756 [2021-02-23 23:04:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-02-23 23:04:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 131. [2021-02-23 23:04:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-02-23 23:04:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2021-02-23 23:04:07,039 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 56 [2021-02-23 23:04:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:07,040 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2021-02-23 23:04:07,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 23:04:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2021-02-23 23:04:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-23 23:04:07,041 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:07,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:07,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 23:04:07,041 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:07,042 INFO L82 PathProgramCache]: Analyzing trace with hash 8782656, now seen corresponding path program 1 times [2021-02-23 23:04:07,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:07,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561928456] [2021-02-23 23:04:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:07,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:07,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:07,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:07,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:07,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:07,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:04:07,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:04:07,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:04:07,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:07,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:04:07,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:07,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:07,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:07,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 23:04:07,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:04:07,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:04:07,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:07,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:07,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:04:07,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:07,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:07,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:07,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:07,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:07,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:07,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561928456] [2021-02-23 23:04:07,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:07,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 23:04:07,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519266987] [2021-02-23 23:04:07,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 23:04:07,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 23:04:07,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-23 23:04:07,575 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand 22 states. [2021-02-23 23:04:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:09,765 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2021-02-23 23:04:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-23 23:04:09,765 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2021-02-23 23:04:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:09,767 INFO L225 Difference]: With dead ends: 232 [2021-02-23 23:04:09,767 INFO L226 Difference]: Without dead ends: 226 [2021-02-23 23:04:09,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=545, Invalid=2317, Unknown=0, NotChecked=0, Total=2862 [2021-02-23 23:04:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-02-23 23:04:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 143. [2021-02-23 23:04:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-02-23 23:04:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2021-02-23 23:04:09,795 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 56 [2021-02-23 23:04:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:09,796 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2021-02-23 23:04:09,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 23:04:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2021-02-23 23:04:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-23 23:04:09,797 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:09,797 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:09,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 23:04:09,797 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:09,798 INFO L82 PathProgramCache]: Analyzing trace with hash 703068211, now seen corresponding path program 2 times [2021-02-23 23:04:09,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:09,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328911840] [2021-02-23 23:04:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:09,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:09,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:09,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:09,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:09,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:09,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:09,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 23:04:09,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:09,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:09,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:09,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:04:09,996 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:04:09,997 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:04:10,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:10,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:10,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:10,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:10,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:10,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:10,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:10,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:10,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:10,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:10,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:10,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328911840] [2021-02-23 23:04:10,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:10,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-23 23:04:10,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472501418] [2021-02-23 23:04:10,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 23:04:10,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 23:04:10,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-02-23 23:04:10,146 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand 16 states. [2021-02-23 23:04:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:11,263 INFO L93 Difference]: Finished difference Result 209 states and 222 transitions. [2021-02-23 23:04:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 23:04:11,263 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2021-02-23 23:04:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:11,265 INFO L225 Difference]: With dead ends: 209 [2021-02-23 23:04:11,265 INFO L226 Difference]: Without dead ends: 190 [2021-02-23 23:04:11,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-02-23 23:04:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-02-23 23:04:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 145. [2021-02-23 23:04:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-02-23 23:04:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-02-23 23:04:11,294 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 57 [2021-02-23 23:04:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:11,294 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-02-23 23:04:11,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 23:04:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-02-23 23:04:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-23 23:04:11,295 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:11,295 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:11,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 23:04:11,295 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:11,296 INFO L82 PathProgramCache]: Analyzing trace with hash -333613565, now seen corresponding path program 1 times [2021-02-23 23:04:11,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:11,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445604473] [2021-02-23 23:04:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:11,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:11,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:11,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:11,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:11,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:11,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:11,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 23:04:11,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:11,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:11,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:04:11,460 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:04:11,461 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:04:11,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:11,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:11,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:11,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:11,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:11,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:11,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:11,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445604473] [2021-02-23 23:04:11,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:11,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-23 23:04:11,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326706854] [2021-02-23 23:04:11,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 23:04:11,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 23:04:11,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-02-23 23:04:11,612 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand 16 states. [2021-02-23 23:04:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:12,650 INFO L93 Difference]: Finished difference Result 187 states and 198 transitions. [2021-02-23 23:04:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 23:04:12,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2021-02-23 23:04:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:12,653 INFO L225 Difference]: With dead ends: 187 [2021-02-23 23:04:12,653 INFO L226 Difference]: Without dead ends: 161 [2021-02-23 23:04:12,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-02-23 23:04:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-23 23:04:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2021-02-23 23:04:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-02-23 23:04:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2021-02-23 23:04:12,674 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 57 [2021-02-23 23:04:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:12,674 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2021-02-23 23:04:12,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 23:04:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2021-02-23 23:04:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-23 23:04:12,675 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:12,675 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:12,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 23:04:12,676 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:12,676 INFO L82 PathProgramCache]: Analyzing trace with hash -388126303, now seen corresponding path program 2 times [2021-02-23 23:04:12,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:12,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684372973] [2021-02-23 23:04:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:12,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:12,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:12,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:12,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:12,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:12,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 23:04:12,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 23:04:12,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:12,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:12,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:04:12,857 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:04:12,857 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:04:12,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:12,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:12,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:12,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:12,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:12,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:12,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:13,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684372973] [2021-02-23 23:04:13,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:13,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-23 23:04:13,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477989289] [2021-02-23 23:04:13,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 23:04:13,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 23:04:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-02-23 23:04:13,010 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand 16 states. [2021-02-23 23:04:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:14,085 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2021-02-23 23:04:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 23:04:14,085 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2021-02-23 23:04:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:14,087 INFO L225 Difference]: With dead ends: 173 [2021-02-23 23:04:14,087 INFO L226 Difference]: Without dead ends: 147 [2021-02-23 23:04:14,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-02-23 23:04:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-02-23 23:04:14,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2021-02-23 23:04:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-02-23 23:04:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-02-23 23:04:14,106 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 57 [2021-02-23 23:04:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:14,106 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-02-23 23:04:14,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 23:04:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-02-23 23:04:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 23:04:14,107 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:14,107 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:14,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 23:04:14,108 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:14,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:14,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1307444566, now seen corresponding path program 3 times [2021-02-23 23:04:14,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:14,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821243549] [2021-02-23 23:04:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:14,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:14,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:14,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:14,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:14,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:04:14,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:04:14,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:04:14,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:04:14,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:04:14,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 23:04:14,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 23:04:14,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-02-23 23:04:14,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-23 23:04:14,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 23:04:14,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-23 23:04:14,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:04:14,596 WARN L141 QuantifierPusher]: treesize reduction 13, result has 67.5 percent of original size [2021-02-23 23:04:14,597 WARN L147 QuantifierPusher]: treesize reduction 13, result has 67.5 percent of original size 27 [2021-02-23 23:04:14,631 WARN L141 QuantifierPusher]: treesize reduction 13, result has 63.9 percent of original size [2021-02-23 23:04:14,632 WARN L147 QuantifierPusher]: treesize reduction 13, result has 63.9 percent of original size 23 [2021-02-23 23:04:14,672 WARN L141 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size [2021-02-23 23:04:14,672 WARN L147 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size 19 [2021-02-23 23:04:14,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:14,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:14,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:14,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:14,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:14,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:14,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:14,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821243549] [2021-02-23 23:04:14,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:14,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-02-23 23:04:14,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603842576] [2021-02-23 23:04:14,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-23 23:04:14,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:14,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-23 23:04:14,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-02-23 23:04:14,897 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand 24 states. [2021-02-23 23:04:16,226 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-02-23 23:04:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:17,739 INFO L93 Difference]: Finished difference Result 208 states and 221 transitions. [2021-02-23 23:04:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-23 23:04:17,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2021-02-23 23:04:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:17,741 INFO L225 Difference]: With dead ends: 208 [2021-02-23 23:04:17,741 INFO L226 Difference]: Without dead ends: 195 [2021-02-23 23:04:17,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=451, Invalid=2629, Unknown=0, NotChecked=0, Total=3080 [2021-02-23 23:04:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-02-23 23:04:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 144. [2021-02-23 23:04:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-02-23 23:04:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2021-02-23 23:04:17,767 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 62 [2021-02-23 23:04:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:17,767 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2021-02-23 23:04:17,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-23 23:04:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2021-02-23 23:04:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 23:04:17,768 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:17,768 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:17,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 23:04:17,768 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash 270762790, now seen corresponding path program 1 times [2021-02-23 23:04:17,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:17,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33187035] [2021-02-23 23:04:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:17,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:17,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:17,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:17,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:17,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:17,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:04:17,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:04:17,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:04:17,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:17,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:04:17,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:17,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:17,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:17,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:18,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 23:04:18,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:04:18,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:04:18,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:18,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:18,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:04:18,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:18,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:18,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:18,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:18,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:18,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:18,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33187035] [2021-02-23 23:04:18,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:18,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 23:04:18,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234585530] [2021-02-23 23:04:18,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 23:04:18,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:18,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 23:04:18,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-23 23:04:18,298 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 22 states. [2021-02-23 23:04:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:20,297 INFO L93 Difference]: Finished difference Result 201 states and 213 transitions. [2021-02-23 23:04:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-23 23:04:20,297 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2021-02-23 23:04:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:20,298 INFO L225 Difference]: With dead ends: 201 [2021-02-23 23:04:20,298 INFO L226 Difference]: Without dead ends: 186 [2021-02-23 23:04:20,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-02-23 23:04:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-23 23:04:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2021-02-23 23:04:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-02-23 23:04:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 153 transitions. [2021-02-23 23:04:20,327 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 153 transitions. Word has length 62 [2021-02-23 23:04:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:20,327 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 153 transitions. [2021-02-23 23:04:20,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 23:04:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 153 transitions. [2021-02-23 23:04:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 23:04:20,328 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:20,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:20,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 23:04:20,328 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash 624075848, now seen corresponding path program 1 times [2021-02-23 23:04:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:20,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309090565] [2021-02-23 23:04:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:20,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:20,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:20,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:04:20,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:20,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:04:20,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:04:20,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:04:20,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:04:20,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:20,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:04:20,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:20,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:20,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:20,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 23:04:20,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:04:20,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:04:20,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:20,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:04:20,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:20,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:20,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:20,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:20,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:20,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309090565] [2021-02-23 23:04:20,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:04:20,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-02-23 23:04:20,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777233303] [2021-02-23 23:04:20,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 23:04:20,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:20,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 23:04:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-23 23:04:20,764 INFO L87 Difference]: Start difference. First operand 144 states and 153 transitions. Second operand 20 states. [2021-02-23 23:04:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:22,424 INFO L93 Difference]: Finished difference Result 207 states and 218 transitions. [2021-02-23 23:04:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-23 23:04:22,427 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2021-02-23 23:04:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:22,429 INFO L225 Difference]: With dead ends: 207 [2021-02-23 23:04:22,429 INFO L226 Difference]: Without dead ends: 188 [2021-02-23 23:04:22,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=368, Invalid=1354, Unknown=0, NotChecked=0, Total=1722 [2021-02-23 23:04:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-02-23 23:04:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2021-02-23 23:04:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-02-23 23:04:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2021-02-23 23:04:22,456 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 62 [2021-02-23 23:04:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:22,457 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2021-02-23 23:04:22,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 23:04:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2021-02-23 23:04:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 23:04:22,458 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:22,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:22,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 23:04:22,458 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -412605928, now seen corresponding path program 1 times [2021-02-23 23:04:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:22,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764638940] [2021-02-23 23:04:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:04:22,474 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:04:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:04:22,489 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:04:22,536 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:04:22,536 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:04:22,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 23:04:22,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:04:22 BoogieIcfgContainer [2021-02-23 23:04:22,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:04:22,646 INFO L168 Benchmark]: Toolchain (without parser) took 28513.53 ms. Allocated memory was 151.0 MB in the beginning and 332.4 MB in the end (delta: 181.4 MB). Free memory was 126.3 MB in the beginning and 210.6 MB in the end (delta: -84.2 MB). Peak memory consumption was 98.3 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:22,646 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:04:22,648 INFO L168 Benchmark]: CACSL2BoogieTranslator took 546.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 103.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:22,648 INFO L168 Benchmark]: Boogie Preprocessor took 85.72 ms. Allocated memory is still 151.0 MB. Free memory was 103.5 MB in the beginning and 133.0 MB in the end (delta: -29.5 MB). Peak memory consumption was 6.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:22,648 INFO L168 Benchmark]: RCFGBuilder took 719.33 ms. Allocated memory is still 151.0 MB. Free memory was 133.0 MB in the beginning and 86.8 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:22,648 INFO L168 Benchmark]: TraceAbstraction took 27143.81 ms. Allocated memory was 151.0 MB in the beginning and 332.4 MB in the end (delta: 181.4 MB). Free memory was 86.3 MB in the beginning and 210.6 MB in the end (delta: -124.3 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:22,649 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 546.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 103.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.72 ms. Allocated memory is still 151.0 MB. Free memory was 103.5 MB in the beginning and 133.0 MB in the end (delta: -29.5 MB). Peak memory consumption was 6.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 719.33 ms. Allocated memory is still 151.0 MB. Free memory was 133.0 MB in the beginning and 86.8 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 27143.81 ms. Allocated memory was 151.0 MB in the beginning and 332.4 MB in the end (delta: 181.4 MB). Free memory was 86.3 MB in the beginning and 210.6 MB in the end (delta: -124.3 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 557]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L533] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L534] List t; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L535] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L536] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L537] p->h = 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L538] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L539] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L540] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L541] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->n={-2:0}, t={-2:0}] [L541] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, p->n={-2:0}, t={-2:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] [L543] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] [L544] p->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] [L545] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L546] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L547] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L548] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->n={-3:0}, t={-3:0}] [L548] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-3:0}, p->n={-3:0}, t={-3:0}] [L543] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-3:0}, t={-3:0}] [L550] p->h = 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-3:0}, t={-3:0}] [L551] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, t={-3:0}] [L552] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L552] COND FALSE !(p->h == 2) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L554] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L554] COND TRUE p->h == 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L555] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->n={-2:0}, t={-3:0}] [L555] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->n={-2:0}, t={-3:0}] [L554] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L554] COND FALSE !(p->h == 1) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L556] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L556] COND TRUE p->h != 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L557] reach_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 101 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26.9s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 19.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1024 SDtfs, 4413 SDslu, 8818 SDs, 0 SdLazy, 7739 SolverSat, 730 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 554 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 15.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 778 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 914 NumberOfCodeBlocks, 914 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 835 ConstructedInterpolants, 0 QuantifiedInterpolants, 450683 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 28/109 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...