/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:01:58,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:01:58,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:01:58,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 23:01:58,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 23:01:58,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 23:01:58,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 23:01:58,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 23:01:58,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 23:01:58,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 23:01:58,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 23:01:58,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 23:01:58,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:01:58,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:01:58,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:01:58,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:01:58,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:01:58,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:01:58,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:01:58,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:01:58,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:01:58,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:01:58,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:01:58,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:01:58,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 23:01:58,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 23:01:58,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 23:01:58,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 23:01:58,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 23:01:58,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 23:01:58,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 23:01:58,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 23:01:58,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 23:01:58,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 23:01:58,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 23:01:58,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 23:01:58,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 23:01:58,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 23:01:58,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:01:58,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:01:58,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:01:58,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:01:58,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:01:58,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:01:58,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:01:58,969 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:01:58,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:01:58,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:01:58,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:01:58,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:01:58,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:01:58,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:01:58,970 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:01:58,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:01:58,970 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:01:58,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:01:58,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:01:58,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:01:58,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:01:58,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:01:58,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:01:58,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:01:58,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:01:58,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:01:58,972 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:01:58,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:01:59,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:01:59,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:01:59,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:01:59,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:01:59,241 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:01:59,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2021-05-02 23:01:59,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21307b1c1/8417eb8c7a7940589decd79e4814e47f/FLAG3c0946996 [2021-05-02 23:01:59,637 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:01:59,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2021-05-02 23:01:59,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21307b1c1/8417eb8c7a7940589decd79e4814e47f/FLAG3c0946996 [2021-05-02 23:02:00,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21307b1c1/8417eb8c7a7940589decd79e4814e47f [2021-05-02 23:02:00,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:02:00,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:02:00,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:02:00,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:02:00,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:02:00,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:02:00" (1/1) ... [2021-05-02 23:02:00,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e32d1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00, skipping insertion in model container [2021-05-02 23:02:00,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:02:00" (1/1) ... [2021-05-02 23:02:00,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:02:00,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:02:00,184 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2021-05-02 23:02:00,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:02:00,212 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:02:00,241 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2021-05-02 23:02:00,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:02:00,305 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:02:00,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00 WrapperNode [2021-05-02 23:02:00,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:02:00,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:02:00,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:02:00,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:02:00,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00" (1/1) ... [2021-05-02 23:02:00,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00" (1/1) ... [2021-05-02 23:02:00,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00" (1/1) ... [2021-05-02 23:02:00,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00" (1/1) ... [2021-05-02 23:02:00,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00" (1/1) ... [2021-05-02 23:02:00,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00" (1/1) ... [2021-05-02 23:02:00,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00" (1/1) ... [2021-05-02 23:02:00,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:02:00,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:02:00,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:02:00,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:02:00,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00" (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 [2021-05-02 23:02:00,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:02:00,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:02:00,402 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:02:00,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:02:00,403 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-05-02 23:02:00,403 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-05-02 23:02:00,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:02:00,403 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-05-02 23:02:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:02:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:02:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:02:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:02:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:02:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:02:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:02:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-05-02 23:02:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-05-02 23:02:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-05-02 23:02:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-05-02 23:02:00,406 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-05-02 23:02:00,406 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-05-02 23:02:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-05-02 23:02:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-05-02 23:02:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-05-02 23:02:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:02:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:02:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:02:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:02:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-02 23:02:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-05-02 23:02:00,857 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:02:00,858 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 23:02:00,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:02:00 BoogieIcfgContainer [2021-05-02 23:02:00,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:02:00,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:02:00,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:02:00,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:02:00,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:02:00" (1/3) ... [2021-05-02 23:02:00,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd64189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:02:00, skipping insertion in model container [2021-05-02 23:02:00,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:00" (2/3) ... [2021-05-02 23:02:00,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd64189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:02:00, skipping insertion in model container [2021-05-02 23:02:00,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:02:00" (3/3) ... [2021-05-02 23:02:00,864 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2021-05-02 23:02:00,869 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:02:00,872 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:02:00,882 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:02:00,901 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:02:00,901 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:02:00,901 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:02:00,901 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:02:00,901 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:02:00,901 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:02:00,902 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:02:00,902 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:02:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:02:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:02:00,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:00,921 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:00,921 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 1 times [2021-05-02 23:02:00,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:00,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454580589] [2021-05-02 23:02:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:00,976 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:01,127 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:01,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454580589] [2021-05-02 23:02:01,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1454580589] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:01,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:01,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:02:01,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485625993] [2021-05-02 23:02:01,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:02:01,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:01,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:02:01,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:02:01,140 INFO L87 Difference]: Start difference. First operand has 53 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:01,218 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2021-05-02 23:02:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:02:01,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 23:02:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:01,223 INFO L225 Difference]: With dead ends: 98 [2021-05-02 23:02:01,224 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 23:02:01,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:02:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 23:02:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 23:02:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:02:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-05-02 23:02:01,257 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2021-05-02 23:02:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:01,257 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-05-02 23:02:01,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-05-02 23:02:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:02:01,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:01,258 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:01,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:02:01,258 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:01,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:01,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 1 times [2021-05-02 23:02:01,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:01,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375260429] [2021-05-02 23:02:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:01,261 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:01,308 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:01,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375260429] [2021-05-02 23:02:01,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375260429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:01,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:01,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:02:01,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262539460] [2021-05-02 23:02:01,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:02:01,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:01,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:02:01,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:02:01,310 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:01,401 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2021-05-02 23:02:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:02:01,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 23:02:01,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:01,403 INFO L225 Difference]: With dead ends: 107 [2021-05-02 23:02:01,403 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:02:01,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:02:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:02:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2021-05-02 23:02:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:02:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-05-02 23:02:01,412 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2021-05-02 23:02:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:01,412 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-05-02 23:02:01,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-05-02 23:02:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:02:01,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:01,413 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:01,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:02:01,413 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 1 times [2021-05-02 23:02:01,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:01,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641488423] [2021-05-02 23:02:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:01,425 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,426 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:01,501 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:01,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641488423] [2021-05-02 23:02:01,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1641488423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:01,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:01,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:02:01,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972351448] [2021-05-02 23:02:01,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:02:01,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:01,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:02:01,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:02:01,503 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:01,636 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2021-05-02 23:02:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:02:01,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 23:02:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:01,637 INFO L225 Difference]: With dead ends: 131 [2021-05-02 23:02:01,637 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 23:02:01,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:02:01,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 23:02:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-05-02 23:02:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:02:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-05-02 23:02:01,646 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2021-05-02 23:02:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:01,646 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-05-02 23:02:01,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-05-02 23:02:01,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:02:01,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:01,647 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:01,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:02:01,647 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:01,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2023168326, now seen corresponding path program 2 times [2021-05-02 23:02:01,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:01,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591171791] [2021-05-02 23:02:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:01,653 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,655 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:01,759 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:01,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591171791] [2021-05-02 23:02:01,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591171791] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:01,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:01,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:02:01,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296277304] [2021-05-02 23:02:01,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:02:01,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:01,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:02:01,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:02:01,761 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:01,907 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2021-05-02 23:02:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:02:01,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:02:01,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:01,909 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:02:01,909 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 23:02:01,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:02:01,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 23:02:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2021-05-02 23:02:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:02:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2021-05-02 23:02:01,917 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 27 [2021-05-02 23:02:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:01,918 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2021-05-02 23:02:01,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2021-05-02 23:02:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:02:01,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:01,919 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 23:02:01,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:02:01,919 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:01,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1646969817, now seen corresponding path program 1 times [2021-05-02 23:02:01,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:01,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799431980] [2021-05-02 23:02:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:01,925 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,926 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:02:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:01,991 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:01,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799431980] [2021-05-02 23:02:01,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1799431980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:01,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:01,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:02:01,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731000747] [2021-05-02 23:02:01,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:02:01,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:01,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:02:01,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:02:01,993 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:02,185 INFO L93 Difference]: Finished difference Result 188 states and 258 transitions. [2021-05-02 23:02:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:02:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-05-02 23:02:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:02,188 INFO L225 Difference]: With dead ends: 188 [2021-05-02 23:02:02,188 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 23:02:02,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:02:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 23:02:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2021-05-02 23:02:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:02:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2021-05-02 23:02:02,198 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 36 [2021-05-02 23:02:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:02,198 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2021-05-02 23:02:02,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2021-05-02 23:02:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:02:02,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:02,200 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:02,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:02:02,200 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:02,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:02,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1502656581, now seen corresponding path program 2 times [2021-05-02 23:02:02,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:02,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492106182] [2021-05-02 23:02:02,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:02,222 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:02,223 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:02,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:02,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 23:02:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:02,319 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:02,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492106182] [2021-05-02 23:02:02,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492106182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:02,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:02,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:02:02,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583863155] [2021-05-02 23:02:02,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:02:02,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:02,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:02:02,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:02:02,320 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:02,540 INFO L93 Difference]: Finished difference Result 232 states and 323 transitions. [2021-05-02 23:02:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:02:02,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2021-05-02 23:02:02,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:02,543 INFO L225 Difference]: With dead ends: 232 [2021-05-02 23:02:02,543 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 23:02:02,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:02:02,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 23:02:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 118. [2021-05-02 23:02:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.336734693877551) internal successors, (131), 98 states have internal predecessors, (131), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:02:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2021-05-02 23:02:02,570 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 43 [2021-05-02 23:02:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:02,570 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2021-05-02 23:02:02,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2021-05-02 23:02:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:02:02,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:02,576 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:02,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:02:02,576 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:02,576 INFO L82 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 3 times [2021-05-02 23:02:02,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:02,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005070792] [2021-05-02 23:02:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:02,584 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:02,587 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:02,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:02,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-05-02 23:02:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:02,691 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:02,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005070792] [2021-05-02 23:02:02,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005070792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:02,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:02,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:02:02,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62468905] [2021-05-02 23:02:02,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:02:02,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:02,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:02:02,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:02:02,692 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:02,905 INFO L93 Difference]: Finished difference Result 276 states and 388 transitions. [2021-05-02 23:02:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:02:02,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-05-02 23:02:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:02,907 INFO L225 Difference]: With dead ends: 276 [2021-05-02 23:02:02,907 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 23:02:02,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:02:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 23:02:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2021-05-02 23:02:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 118 states have internal predecessors, (158), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:02:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2021-05-02 23:02:02,915 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 50 [2021-05-02 23:02:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:02,915 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2021-05-02 23:02:02,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2021-05-02 23:02:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:02:02,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:02,916 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:02,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:02:02,916 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:02,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:02,916 INFO L82 PathProgramCache]: Analyzing trace with hash -246769791, now seen corresponding path program 4 times [2021-05-02 23:02:02,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:02,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448962406] [2021-05-02 23:02:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:02,920 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:02,921 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 23:02:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:03,029 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:03,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448962406] [2021-05-02 23:02:03,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [448962406] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:03,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:03,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:02:03,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048160391] [2021-05-02 23:02:03,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:02:03,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:03,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:02:03,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:02:03,030 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:03,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:03,357 INFO L93 Difference]: Finished difference Result 320 states and 453 transitions. [2021-05-02 23:02:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:02:03,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2021-05-02 23:02:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:03,358 INFO L225 Difference]: With dead ends: 320 [2021-05-02 23:02:03,358 INFO L226 Difference]: Without dead ends: 196 [2021-05-02 23:02:03,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:02:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-02 23:02:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 164. [2021-05-02 23:02:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:02:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 225 transitions. [2021-05-02 23:02:03,367 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 225 transitions. Word has length 57 [2021-05-02 23:02:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:03,367 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 225 transitions. [2021-05-02 23:02:03,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 225 transitions. [2021-05-02 23:02:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:02:03,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:03,368 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:03,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:02:03,368 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -268874321, now seen corresponding path program 5 times [2021-05-02 23:02:03,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:03,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425121037] [2021-05-02 23:02:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:03,372 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:03,374 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-05-02 23:02:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:03,469 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:03,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425121037] [2021-05-02 23:02:03,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [425121037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:03,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:03,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:02:03,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937169736] [2021-05-02 23:02:03,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:02:03,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:03,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:02:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:02:03,470 INFO L87 Difference]: Start difference. First operand 164 states and 225 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:03,720 INFO L93 Difference]: Finished difference Result 364 states and 518 transitions. [2021-05-02 23:02:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:02:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2021-05-02 23:02:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:03,721 INFO L225 Difference]: With dead ends: 364 [2021-05-02 23:02:03,721 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 23:02:03,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:02:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 23:02:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2021-05-02 23:02:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 158 states have (on average 1.3417721518987342) internal successors, (212), 158 states have internal predecessors, (212), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 23:02:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 258 transitions. [2021-05-02 23:02:03,731 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 258 transitions. Word has length 64 [2021-05-02 23:02:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:03,731 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 258 transitions. [2021-05-02 23:02:03,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:03,731 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 258 transitions. [2021-05-02 23:02:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:02:03,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:03,732 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:03,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:02:03,732 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:03,733 INFO L82 PathProgramCache]: Analyzing trace with hash -150953283, now seen corresponding path program 6 times [2021-05-02 23:02:03,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:03,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883658892] [2021-05-02 23:02:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:03,737 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:03,738 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-05-02 23:02:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:03,819 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:03,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883658892] [2021-05-02 23:02:03,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [883658892] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:03,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:03,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:02:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903973536] [2021-05-02 23:02:03,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:02:03,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:03,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:02:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:02:03,821 INFO L87 Difference]: Start difference. First operand 187 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:04,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:04,120 INFO L93 Difference]: Finished difference Result 408 states and 583 transitions. [2021-05-02 23:02:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:02:04,121 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2021-05-02 23:02:04,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:04,122 INFO L225 Difference]: With dead ends: 408 [2021-05-02 23:02:04,122 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 23:02:04,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:02:04,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 23:02:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2021-05-02 23:02:04,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 178 states have (on average 1.3426966292134832) internal successors, (239), 178 states have internal predecessors, (239), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 23:02:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 291 transitions. [2021-05-02 23:02:04,132 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 291 transitions. Word has length 71 [2021-05-02 23:02:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:04,133 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 291 transitions. [2021-05-02 23:02:04,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 291 transitions. [2021-05-02 23:02:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:02:04,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:04,134 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:04,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:02:04,134 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:04,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1180638093, now seen corresponding path program 7 times [2021-05-02 23:02:04,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:04,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172558410] [2021-05-02 23:02:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:04,138 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:04,139 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 23:02:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:04,265 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172558410] [2021-05-02 23:02:04,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172558410] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:04,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:04,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:02:04,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349256266] [2021-05-02 23:02:04,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:02:04,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:04,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:02:04,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:02:04,266 INFO L87 Difference]: Start difference. First operand 210 states and 291 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:04,676 INFO L93 Difference]: Finished difference Result 452 states and 648 transitions. [2021-05-02 23:02:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:02:04,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2021-05-02 23:02:04,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:04,678 INFO L225 Difference]: With dead ends: 452 [2021-05-02 23:02:04,678 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 23:02:04,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:02:04,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 23:02:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2021-05-02 23:02:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 198 states have (on average 1.3434343434343434) internal successors, (266), 198 states have internal predecessors, (266), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 23:02:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 324 transitions. [2021-05-02 23:02:04,691 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 324 transitions. Word has length 78 [2021-05-02 23:02:04,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:04,691 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 324 transitions. [2021-05-02 23:02:04,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 324 transitions. [2021-05-02 23:02:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 23:02:04,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:04,692 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:04,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:02:04,692 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:04,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1953261063, now seen corresponding path program 8 times [2021-05-02 23:02:04,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:04,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611170250] [2021-05-02 23:02:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:04,697 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:04,698 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-05-02 23:02:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:04,813 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:04,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611170250] [2021-05-02 23:02:04,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611170250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:04,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:04,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:02:04,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429835150] [2021-05-02 23:02:04,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:02:04,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:02:04,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:02:04,814 INFO L87 Difference]: Start difference. First operand 233 states and 324 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:05,132 INFO L93 Difference]: Finished difference Result 496 states and 713 transitions. [2021-05-02 23:02:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:02:05,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2021-05-02 23:02:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:05,134 INFO L225 Difference]: With dead ends: 496 [2021-05-02 23:02:05,134 INFO L226 Difference]: Without dead ends: 288 [2021-05-02 23:02:05,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:02:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-02 23:02:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 256. [2021-05-02 23:02:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 218 states have internal predecessors, (293), 33 states have call successors, (33), 6 states have call predecessors, (33), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 23:02:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2021-05-02 23:02:05,145 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 85 [2021-05-02 23:02:05,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:05,145 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2021-05-02 23:02:05,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2021-05-02 23:02:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:02:05,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:05,147 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:05,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:02:05,147 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:05,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 9 times [2021-05-02 23:02:05,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:05,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174463187] [2021-05-02 23:02:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:05,151 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:05,153 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:02:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:05,309 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:05,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174463187] [2021-05-02 23:02:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174463187] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:05,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:05,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:02:05,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102792081] [2021-05-02 23:02:05,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:02:05,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:02:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:02:05,310 INFO L87 Difference]: Start difference. First operand 256 states and 357 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:05,713 INFO L93 Difference]: Finished difference Result 540 states and 778 transitions. [2021-05-02 23:02:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:02:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2021-05-02 23:02:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:05,715 INFO L225 Difference]: With dead ends: 540 [2021-05-02 23:02:05,715 INFO L226 Difference]: Without dead ends: 311 [2021-05-02 23:02:05,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:02:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-02 23:02:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 279. [2021-05-02 23:02:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 238 states have (on average 1.3445378151260505) internal successors, (320), 238 states have internal predecessors, (320), 36 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 23:02:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 390 transitions. [2021-05-02 23:02:05,728 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 390 transitions. Word has length 92 [2021-05-02 23:02:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:05,729 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 390 transitions. [2021-05-02 23:02:05,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 390 transitions. [2021-05-02 23:02:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:02:05,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:05,730 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:05,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:02:05,730 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:05,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1117504203, now seen corresponding path program 10 times [2021-05-02 23:02:05,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:05,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132263533] [2021-05-02 23:02:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:05,735 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:05,736 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-05-02 23:02:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:05,860 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:05,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132263533] [2021-05-02 23:02:05,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [132263533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:05,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:05,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:02:05,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903786387] [2021-05-02 23:02:05,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:02:05,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:02:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:02:05,861 INFO L87 Difference]: Start difference. First operand 279 states and 390 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:06,304 INFO L93 Difference]: Finished difference Result 584 states and 843 transitions. [2021-05-02 23:02:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:02:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2021-05-02 23:02:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:06,306 INFO L225 Difference]: With dead ends: 584 [2021-05-02 23:02:06,306 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 23:02:06,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:02:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 23:02:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 302. [2021-05-02 23:02:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 258 states have (on average 1.3449612403100775) internal successors, (347), 258 states have internal predecessors, (347), 39 states have call successors, (39), 6 states have call predecessors, (39), 4 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 23:02:06,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 423 transitions. [2021-05-02 23:02:06,319 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 423 transitions. Word has length 99 [2021-05-02 23:02:06,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:06,319 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 423 transitions. [2021-05-02 23:02:06,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 423 transitions. [2021-05-02 23:02:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 23:02:06,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:06,320 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:06,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:02:06,320 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1433890299, now seen corresponding path program 11 times [2021-05-02 23:02:06,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:06,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122595459] [2021-05-02 23:02:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:06,325 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:06,326 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:06,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:06,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-05-02 23:02:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:06,455 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:06,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122595459] [2021-05-02 23:02:06,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [122595459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:06,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:06,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:02:06,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642484049] [2021-05-02 23:02:06,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:02:06,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:02:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:02:06,456 INFO L87 Difference]: Start difference. First operand 302 states and 423 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:06,934 INFO L93 Difference]: Finished difference Result 628 states and 908 transitions. [2021-05-02 23:02:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:02:06,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 106 [2021-05-02 23:02:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:06,936 INFO L225 Difference]: With dead ends: 628 [2021-05-02 23:02:06,936 INFO L226 Difference]: Without dead ends: 357 [2021-05-02 23:02:06,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:02:06,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-02 23:02:06,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 325. [2021-05-02 23:02:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 278 states have (on average 1.3453237410071943) internal successors, (374), 278 states have internal predecessors, (374), 42 states have call successors, (42), 6 states have call predecessors, (42), 4 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:02:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 456 transitions. [2021-05-02 23:02:06,949 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 456 transitions. Word has length 106 [2021-05-02 23:02:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:06,949 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 456 transitions. [2021-05-02 23:02:06,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 456 transitions. [2021-05-02 23:02:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 23:02:06,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:06,951 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:06,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:02:06,951 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash -464302991, now seen corresponding path program 12 times [2021-05-02 23:02:06,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:06,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804722985] [2021-05-02 23:02:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:06,955 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:06,956 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-05-02 23:02:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:07,109 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:07,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804722985] [2021-05-02 23:02:07,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804722985] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:07,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:07,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:02:07,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39193904] [2021-05-02 23:02:07,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:02:07,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:07,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:02:07,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:02:07,110 INFO L87 Difference]: Start difference. First operand 325 states and 456 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:07,554 INFO L93 Difference]: Finished difference Result 672 states and 973 transitions. [2021-05-02 23:02:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:02:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 113 [2021-05-02 23:02:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:07,556 INFO L225 Difference]: With dead ends: 672 [2021-05-02 23:02:07,556 INFO L226 Difference]: Without dead ends: 380 [2021-05-02 23:02:07,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:02:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-02 23:02:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 348. [2021-05-02 23:02:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 298 states have (on average 1.3456375838926173) internal successors, (401), 298 states have internal predecessors, (401), 45 states have call successors, (45), 6 states have call predecessors, (45), 4 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 23:02:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 489 transitions. [2021-05-02 23:02:07,572 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 489 transitions. Word has length 113 [2021-05-02 23:02:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:07,572 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 489 transitions. [2021-05-02 23:02:07,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 489 transitions. [2021-05-02 23:02:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 23:02:07,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:07,574 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:07,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:02:07,574 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 551870655, now seen corresponding path program 13 times [2021-05-02 23:02:07,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:07,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046669396] [2021-05-02 23:02:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:07,579 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:07,581 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-05-02 23:02:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:07,744 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:07,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046669396] [2021-05-02 23:02:07,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046669396] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:07,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:07,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:02:07,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403150948] [2021-05-02 23:02:07,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:02:07,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:07,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:02:07,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:02:07,745 INFO L87 Difference]: Start difference. First operand 348 states and 489 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:08,272 INFO L93 Difference]: Finished difference Result 716 states and 1038 transitions. [2021-05-02 23:02:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:02:08,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 120 [2021-05-02 23:02:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:08,274 INFO L225 Difference]: With dead ends: 716 [2021-05-02 23:02:08,274 INFO L226 Difference]: Without dead ends: 403 [2021-05-02 23:02:08,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:02:08,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-05-02 23:02:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 371. [2021-05-02 23:02:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 318 states have (on average 1.3459119496855345) internal successors, (428), 318 states have internal predecessors, (428), 48 states have call successors, (48), 6 states have call predecessors, (48), 4 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-05-02 23:02:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 522 transitions. [2021-05-02 23:02:08,291 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 522 transitions. Word has length 120 [2021-05-02 23:02:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:08,291 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 522 transitions. [2021-05-02 23:02:08,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 522 transitions. [2021-05-02 23:02:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 23:02:08,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:08,292 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:08,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:02:08,292 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:08,292 INFO L82 PathProgramCache]: Analyzing trace with hash -37648467, now seen corresponding path program 14 times [2021-05-02 23:02:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:08,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236573681] [2021-05-02 23:02:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:08,297 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:08,298 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:08,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:08,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-05-02 23:02:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:08,508 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:08,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236573681] [2021-05-02 23:02:08,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [236573681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:08,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:08,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:02:08,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719992627] [2021-05-02 23:02:08,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:02:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:02:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:02:08,509 INFO L87 Difference]: Start difference. First operand 371 states and 522 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:09,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:09,056 INFO L93 Difference]: Finished difference Result 760 states and 1103 transitions. [2021-05-02 23:02:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:02:09,056 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 127 [2021-05-02 23:02:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:09,058 INFO L225 Difference]: With dead ends: 760 [2021-05-02 23:02:09,058 INFO L226 Difference]: Without dead ends: 426 [2021-05-02 23:02:09,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:02:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-05-02 23:02:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2021-05-02 23:02:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 338 states have (on average 1.3461538461538463) internal successors, (455), 338 states have internal predecessors, (455), 51 states have call successors, (51), 6 states have call predecessors, (51), 4 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-05-02 23:02:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 555 transitions. [2021-05-02 23:02:09,073 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 555 transitions. Word has length 127 [2021-05-02 23:02:09,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:09,073 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 555 transitions. [2021-05-02 23:02:09,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 555 transitions. [2021-05-02 23:02:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 23:02:09,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:09,075 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:09,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:02:09,075 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash 408078211, now seen corresponding path program 15 times [2021-05-02 23:02:09,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:09,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913726231] [2021-05-02 23:02:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:09,080 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:09,081 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:09,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:09,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-05-02 23:02:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:09,269 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:09,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913726231] [2021-05-02 23:02:09,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1913726231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:09,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:09,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:02:09,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687780333] [2021-05-02 23:02:09,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:02:09,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:09,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:02:09,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:02:09,291 INFO L87 Difference]: Start difference. First operand 394 states and 555 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:09,865 INFO L93 Difference]: Finished difference Result 804 states and 1168 transitions. [2021-05-02 23:02:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:02:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 134 [2021-05-02 23:02:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:09,867 INFO L225 Difference]: With dead ends: 804 [2021-05-02 23:02:09,867 INFO L226 Difference]: Without dead ends: 449 [2021-05-02 23:02:09,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:02:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-02 23:02:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 417. [2021-05-02 23:02:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 358 states have (on average 1.3463687150837989) internal successors, (482), 358 states have internal predecessors, (482), 54 states have call successors, (54), 6 states have call predecessors, (54), 4 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 23:02:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 588 transitions. [2021-05-02 23:02:09,887 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 588 transitions. Word has length 134 [2021-05-02 23:02:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:09,887 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 588 transitions. [2021-05-02 23:02:09,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 588 transitions. [2021-05-02 23:02:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 23:02:09,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:09,888 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:09,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:02:09,888 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash 143634153, now seen corresponding path program 16 times [2021-05-02 23:02:09,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:09,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420016029] [2021-05-02 23:02:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:09,894 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:09,895 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-05-02 23:02:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:10,112 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:10,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420016029] [2021-05-02 23:02:10,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [420016029] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:10,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:10,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:02:10,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473285029] [2021-05-02 23:02:10,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:02:10,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:10,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:02:10,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:02:10,113 INFO L87 Difference]: Start difference. First operand 417 states and 588 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:10,641 INFO L93 Difference]: Finished difference Result 848 states and 1233 transitions. [2021-05-02 23:02:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:02:10,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 141 [2021-05-02 23:02:10,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:10,643 INFO L225 Difference]: With dead ends: 848 [2021-05-02 23:02:10,644 INFO L226 Difference]: Without dead ends: 472 [2021-05-02 23:02:10,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:02:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-02 23:02:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 440. [2021-05-02 23:02:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 378 states have (on average 1.3465608465608465) internal successors, (509), 378 states have internal predecessors, (509), 57 states have call successors, (57), 6 states have call predecessors, (57), 4 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 23:02:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 621 transitions. [2021-05-02 23:02:10,660 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 621 transitions. Word has length 141 [2021-05-02 23:02:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:10,660 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 621 transitions. [2021-05-02 23:02:10,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 621 transitions. [2021-05-02 23:02:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 23:02:10,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:10,662 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:10,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:02:10,662 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:10,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2040554055, now seen corresponding path program 17 times [2021-05-02 23:02:10,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:10,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537356996] [2021-05-02 23:02:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:10,667 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:10,669 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:02:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:10,899 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:10,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537356996] [2021-05-02 23:02:10,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [537356996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:10,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:10,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:02:10,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289966284] [2021-05-02 23:02:10,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:02:10,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:10,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:02:10,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:02:10,900 INFO L87 Difference]: Start difference. First operand 440 states and 621 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:11,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:11,604 INFO L93 Difference]: Finished difference Result 892 states and 1298 transitions. [2021-05-02 23:02:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:02:11,605 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 148 [2021-05-02 23:02:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:11,606 INFO L225 Difference]: With dead ends: 892 [2021-05-02 23:02:11,607 INFO L226 Difference]: Without dead ends: 495 [2021-05-02 23:02:11,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:02:11,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-02 23:02:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 463. [2021-05-02 23:02:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 398 states have (on average 1.3467336683417086) internal successors, (536), 398 states have internal predecessors, (536), 60 states have call successors, (60), 6 states have call predecessors, (60), 4 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 23:02:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 654 transitions. [2021-05-02 23:02:11,624 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 654 transitions. Word has length 148 [2021-05-02 23:02:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:11,624 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 654 transitions. [2021-05-02 23:02:11,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 654 transitions. [2021-05-02 23:02:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 23:02:11,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:11,626 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:11,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:02:11,626 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1629389349, now seen corresponding path program 18 times [2021-05-02 23:02:11,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:11,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50002253] [2021-05-02 23:02:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:11,631 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:11,632 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:11,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:11,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-05-02 23:02:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:11,875 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:11,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50002253] [2021-05-02 23:02:11,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [50002253] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:11,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:11,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:02:11,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645450872] [2021-05-02 23:02:11,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:02:11,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:11,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:02:11,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:02:11,876 INFO L87 Difference]: Start difference. First operand 463 states and 654 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:12,647 INFO L93 Difference]: Finished difference Result 936 states and 1363 transitions. [2021-05-02 23:02:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:02:12,648 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 155 [2021-05-02 23:02:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:12,650 INFO L225 Difference]: With dead ends: 936 [2021-05-02 23:02:12,650 INFO L226 Difference]: Without dead ends: 518 [2021-05-02 23:02:12,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:02:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-02 23:02:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 486. [2021-05-02 23:02:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 418 states have (on average 1.3468899521531101) internal successors, (563), 418 states have internal predecessors, (563), 63 states have call successors, (63), 6 states have call predecessors, (63), 4 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 23:02:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 687 transitions. [2021-05-02 23:02:12,669 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 687 transitions. Word has length 155 [2021-05-02 23:02:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:12,669 INFO L480 AbstractCegarLoop]: Abstraction has 486 states and 687 transitions. [2021-05-02 23:02:12,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 687 transitions. [2021-05-02 23:02:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 23:02:12,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:12,671 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:12,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:02:12,671 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:12,671 INFO L82 PathProgramCache]: Analyzing trace with hash -148049653, now seen corresponding path program 19 times [2021-05-02 23:02:12,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:12,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855447542] [2021-05-02 23:02:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:12,676 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:12,677 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:12,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:12,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-05-02 23:02:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:12,951 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:12,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855447542] [2021-05-02 23:02:12,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [855447542] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:12,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:12,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:02:12,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220342713] [2021-05-02 23:02:12,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:02:12,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:12,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:02:12,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:02:12,952 INFO L87 Difference]: Start difference. First operand 486 states and 687 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:13,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:13,794 INFO L93 Difference]: Finished difference Result 980 states and 1428 transitions. [2021-05-02 23:02:13,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:02:13,795 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2021-05-02 23:02:13,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:13,797 INFO L225 Difference]: With dead ends: 980 [2021-05-02 23:02:13,797 INFO L226 Difference]: Without dead ends: 541 [2021-05-02 23:02:13,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:02:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-05-02 23:02:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 509. [2021-05-02 23:02:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 438 states have (on average 1.3470319634703196) internal successors, (590), 438 states have internal predecessors, (590), 66 states have call successors, (66), 6 states have call predecessors, (66), 4 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-05-02 23:02:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 720 transitions. [2021-05-02 23:02:13,815 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 720 transitions. Word has length 162 [2021-05-02 23:02:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:13,816 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 720 transitions. [2021-05-02 23:02:13,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 720 transitions. [2021-05-02 23:02:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 23:02:13,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:13,817 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:13,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:02:13,818 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:13,818 INFO L82 PathProgramCache]: Analyzing trace with hash 491700577, now seen corresponding path program 20 times [2021-05-02 23:02:13,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:13,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832938738] [2021-05-02 23:02:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:13,822 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:13,823 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:14,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:14,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-05-02 23:02:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:14,079 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:14,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832938738] [2021-05-02 23:02:14,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [832938738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:14,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:14,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:02:14,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102861359] [2021-05-02 23:02:14,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:02:14,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:14,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:02:14,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:02:14,080 INFO L87 Difference]: Start difference. First operand 509 states and 720 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:14,886 INFO L93 Difference]: Finished difference Result 1024 states and 1493 transitions. [2021-05-02 23:02:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:02:14,886 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 169 [2021-05-02 23:02:14,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:14,888 INFO L225 Difference]: With dead ends: 1024 [2021-05-02 23:02:14,889 INFO L226 Difference]: Without dead ends: 564 [2021-05-02 23:02:14,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:02:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-05-02 23:02:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 532. [2021-05-02 23:02:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 458 states have (on average 1.3471615720524017) internal successors, (617), 458 states have internal predecessors, (617), 69 states have call successors, (69), 6 states have call predecessors, (69), 4 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 23:02:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 753 transitions. [2021-05-02 23:02:14,907 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 753 transitions. Word has length 169 [2021-05-02 23:02:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:14,908 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 753 transitions. [2021-05-02 23:02:14,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 753 transitions. [2021-05-02 23:02:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-02 23:02:14,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:14,910 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:14,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:02:14,910 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 21 times [2021-05-02 23:02:14,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:14,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112414861] [2021-05-02 23:02:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:14,914 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:14,915 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-05-02 23:02:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:15,202 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:15,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112414861] [2021-05-02 23:02:15,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112414861] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:15,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:15,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:02:15,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834707905] [2021-05-02 23:02:15,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:02:15,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:15,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:02:15,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:02:15,203 INFO L87 Difference]: Start difference. First operand 532 states and 753 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:16,092 INFO L93 Difference]: Finished difference Result 1068 states and 1558 transitions. [2021-05-02 23:02:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:02:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 176 [2021-05-02 23:02:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:16,095 INFO L225 Difference]: With dead ends: 1068 [2021-05-02 23:02:16,095 INFO L226 Difference]: Without dead ends: 587 [2021-05-02 23:02:16,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:02:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-05-02 23:02:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 555. [2021-05-02 23:02:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 478 states have (on average 1.3472803347280335) internal successors, (644), 478 states have internal predecessors, (644), 72 states have call successors, (72), 6 states have call predecessors, (72), 4 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2021-05-02 23:02:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 786 transitions. [2021-05-02 23:02:16,119 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 786 transitions. Word has length 176 [2021-05-02 23:02:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:16,119 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 786 transitions. [2021-05-02 23:02:16,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 786 transitions. [2021-05-02 23:02:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 23:02:16,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:16,122 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:16,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:02:16,122 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:16,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:16,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1753296029, now seen corresponding path program 22 times [2021-05-02 23:02:16,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:16,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137790711] [2021-05-02 23:02:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:16,127 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:16,128 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:16,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:16,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-05-02 23:02:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:16,446 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:16,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137790711] [2021-05-02 23:02:16,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137790711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:16,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:16,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:02:16,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544953509] [2021-05-02 23:02:16,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:02:16,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:02:16,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:02:16,449 INFO L87 Difference]: Start difference. First operand 555 states and 786 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:17,359 INFO L93 Difference]: Finished difference Result 1112 states and 1623 transitions. [2021-05-02 23:02:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:02:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 183 [2021-05-02 23:02:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:17,361 INFO L225 Difference]: With dead ends: 1112 [2021-05-02 23:02:17,361 INFO L226 Difference]: Without dead ends: 610 [2021-05-02 23:02:17,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:02:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-05-02 23:02:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 578. [2021-05-02 23:02:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 498 states have (on average 1.3473895582329318) internal successors, (671), 498 states have internal predecessors, (671), 75 states have call successors, (75), 6 states have call predecessors, (75), 4 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 23:02:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 819 transitions. [2021-05-02 23:02:17,386 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 819 transitions. Word has length 183 [2021-05-02 23:02:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:17,386 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 819 transitions. [2021-05-02 23:02:17,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 819 transitions. [2021-05-02 23:02:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-02 23:02:17,388 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:17,388 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:17,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:02:17,389 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 788523667, now seen corresponding path program 23 times [2021-05-02 23:02:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:17,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893117692] [2021-05-02 23:02:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:17,393 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:17,394 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:17,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:17,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-05-02 23:02:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:17,746 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:17,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893117692] [2021-05-02 23:02:17,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [893117692] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:17,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:17,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:02:17,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316178999] [2021-05-02 23:02:17,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:02:17,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:17,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:02:17,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:02:17,747 INFO L87 Difference]: Start difference. First operand 578 states and 819 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:18,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:18,655 INFO L93 Difference]: Finished difference Result 1156 states and 1688 transitions. [2021-05-02 23:02:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:02:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 190 [2021-05-02 23:02:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:18,679 INFO L225 Difference]: With dead ends: 1156 [2021-05-02 23:02:18,679 INFO L226 Difference]: Without dead ends: 633 [2021-05-02 23:02:18,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:02:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-05-02 23:02:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 601. [2021-05-02 23:02:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 518 states have (on average 1.3474903474903475) internal successors, (698), 518 states have internal predecessors, (698), 78 states have call successors, (78), 6 states have call predecessors, (78), 4 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2021-05-02 23:02:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 852 transitions. [2021-05-02 23:02:18,718 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 852 transitions. Word has length 190 [2021-05-02 23:02:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:18,718 INFO L480 AbstractCegarLoop]: Abstraction has 601 states and 852 transitions. [2021-05-02 23:02:18,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 852 transitions. [2021-05-02 23:02:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 23:02:18,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:18,720 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:18,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:02:18,720 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash -543783975, now seen corresponding path program 24 times [2021-05-02 23:02:18,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:18,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002365305] [2021-05-02 23:02:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:18,739 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:18,740 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:19,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:19,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-05-02 23:02:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:19,150 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:19,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002365305] [2021-05-02 23:02:19,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002365305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:19,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:19,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:02:19,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405406899] [2021-05-02 23:02:19,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:02:19,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:19,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:02:19,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:02:19,151 INFO L87 Difference]: Start difference. First operand 601 states and 852 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:20,222 INFO L93 Difference]: Finished difference Result 1200 states and 1753 transitions. [2021-05-02 23:02:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:02:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 197 [2021-05-02 23:02:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:20,224 INFO L225 Difference]: With dead ends: 1200 [2021-05-02 23:02:20,224 INFO L226 Difference]: Without dead ends: 656 [2021-05-02 23:02:20,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:02:20,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-05-02 23:02:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 624. [2021-05-02 23:02:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 538 states have (on average 1.3475836431226766) internal successors, (725), 538 states have internal predecessors, (725), 81 states have call successors, (81), 6 states have call predecessors, (81), 4 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 23:02:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 885 transitions. [2021-05-02 23:02:20,248 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 885 transitions. Word has length 197 [2021-05-02 23:02:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:20,248 INFO L480 AbstractCegarLoop]: Abstraction has 624 states and 885 transitions. [2021-05-02 23:02:20,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 885 transitions. [2021-05-02 23:02:20,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 23:02:20,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:20,250 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:20,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:02:20,250 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1485100375, now seen corresponding path program 25 times [2021-05-02 23:02:20,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:20,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289438575] [2021-05-02 23:02:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:20,255 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:20,256 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:20,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:20,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-05-02 23:02:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:20,620 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:20,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289438575] [2021-05-02 23:02:20,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1289438575] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:20,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:20,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:02:20,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714650675] [2021-05-02 23:02:20,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:02:20,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:20,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:02:20,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:02:20,621 INFO L87 Difference]: Start difference. First operand 624 states and 885 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:21,712 INFO L93 Difference]: Finished difference Result 1244 states and 1818 transitions. [2021-05-02 23:02:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:02:21,713 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 204 [2021-05-02 23:02:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:21,715 INFO L225 Difference]: With dead ends: 1244 [2021-05-02 23:02:21,715 INFO L226 Difference]: Without dead ends: 679 [2021-05-02 23:02:21,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 335.6ms TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:02:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-05-02 23:02:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 647. [2021-05-02 23:02:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 558 states have (on average 1.3476702508960574) internal successors, (752), 558 states have internal predecessors, (752), 84 states have call successors, (84), 6 states have call predecessors, (84), 4 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2021-05-02 23:02:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 918 transitions. [2021-05-02 23:02:21,745 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 918 transitions. Word has length 204 [2021-05-02 23:02:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:21,745 INFO L480 AbstractCegarLoop]: Abstraction has 647 states and 918 transitions. [2021-05-02 23:02:21,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 918 transitions. [2021-05-02 23:02:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-05-02 23:02:21,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:21,747 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:21,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:02:21,748 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash -319846635, now seen corresponding path program 26 times [2021-05-02 23:02:21,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:21,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705321886] [2021-05-02 23:02:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:21,753 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:21,754 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:22,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:22,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-05-02 23:02:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:22,232 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:22,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705321886] [2021-05-02 23:02:22,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [705321886] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:22,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:22,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:02:22,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092386236] [2021-05-02 23:02:22,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:02:22,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:02:22,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:02:22,233 INFO L87 Difference]: Start difference. First operand 647 states and 918 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:23,467 INFO L93 Difference]: Finished difference Result 1288 states and 1883 transitions. [2021-05-02 23:02:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:02:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 211 [2021-05-02 23:02:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:23,469 INFO L225 Difference]: With dead ends: 1288 [2021-05-02 23:02:23,469 INFO L226 Difference]: Without dead ends: 702 [2021-05-02 23:02:23,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:02:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-05-02 23:02:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 670. [2021-05-02 23:02:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 578 states have (on average 1.3477508650519032) internal successors, (779), 578 states have internal predecessors, (779), 87 states have call successors, (87), 6 states have call predecessors, (87), 4 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-02 23:02:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 951 transitions. [2021-05-02 23:02:23,514 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 951 transitions. Word has length 211 [2021-05-02 23:02:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:23,514 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 951 transitions. [2021-05-02 23:02:23,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 951 transitions. [2021-05-02 23:02:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-02 23:02:23,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:23,516 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:23,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:02:23,516 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash -993676261, now seen corresponding path program 27 times [2021-05-02 23:02:23,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:23,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367425258] [2021-05-02 23:02:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:23,521 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:23,522 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:23,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:23,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-05-02 23:02:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:23,974 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:23,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367425258] [2021-05-02 23:02:23,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367425258] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:23,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:23,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:02:23,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442938077] [2021-05-02 23:02:23,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:02:23,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:23,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:02:23,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:02:23,976 INFO L87 Difference]: Start difference. First operand 670 states and 951 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:24,903 INFO L93 Difference]: Finished difference Result 1332 states and 1948 transitions. [2021-05-02 23:02:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:02:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 218 [2021-05-02 23:02:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:24,907 INFO L225 Difference]: With dead ends: 1332 [2021-05-02 23:02:24,907 INFO L226 Difference]: Without dead ends: 725 [2021-05-02 23:02:24,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=505, Invalid=685, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:02:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-05-02 23:02:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 693. [2021-05-02 23:02:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 598 states have (on average 1.3478260869565217) internal successors, (806), 598 states have internal predecessors, (806), 90 states have call successors, (90), 6 states have call predecessors, (90), 4 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2021-05-02 23:02:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 984 transitions. [2021-05-02 23:02:24,937 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 984 transitions. Word has length 218 [2021-05-02 23:02:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:24,937 INFO L480 AbstractCegarLoop]: Abstraction has 693 states and 984 transitions. [2021-05-02 23:02:24,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 984 transitions. [2021-05-02 23:02:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 23:02:24,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:24,940 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:24,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:02:24,940 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:24,940 INFO L82 PathProgramCache]: Analyzing trace with hash 611120721, now seen corresponding path program 28 times [2021-05-02 23:02:24,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:24,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829862790] [2021-05-02 23:02:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:24,944 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:24,945 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:25,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:25,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-05-02 23:02:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:25,364 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829862790] [2021-05-02 23:02:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829862790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:25,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:25,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:02:25,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360189860] [2021-05-02 23:02:25,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:02:25,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:25,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:02:25,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:02:25,365 INFO L87 Difference]: Start difference. First operand 693 states and 984 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:26,325 INFO L93 Difference]: Finished difference Result 1376 states and 2013 transitions. [2021-05-02 23:02:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:02:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 225 [2021-05-02 23:02:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:26,328 INFO L225 Difference]: With dead ends: 1376 [2021-05-02 23:02:26,328 INFO L226 Difference]: Without dead ends: 748 [2021-05-02 23:02:26,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:02:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-05-02 23:02:26,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 716. [2021-05-02 23:02:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 618 states have (on average 1.3478964401294498) internal successors, (833), 618 states have internal predecessors, (833), 93 states have call successors, (93), 6 states have call predecessors, (93), 4 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-02 23:02:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1017 transitions. [2021-05-02 23:02:26,360 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1017 transitions. Word has length 225 [2021-05-02 23:02:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:26,361 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1017 transitions. [2021-05-02 23:02:26,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1017 transitions. [2021-05-02 23:02:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-05-02 23:02:26,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:26,363 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:26,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:02:26,364 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:26,364 INFO L82 PathProgramCache]: Analyzing trace with hash 144819935, now seen corresponding path program 29 times [2021-05-02 23:02:26,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:26,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123257601] [2021-05-02 23:02:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:26,369 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:26,370 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2021-05-02 23:02:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:26,826 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:26,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123257601] [2021-05-02 23:02:26,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2123257601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:26,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:26,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:02:26,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866445103] [2021-05-02 23:02:26,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:02:26,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:26,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:02:26,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:02:26,827 INFO L87 Difference]: Start difference. First operand 716 states and 1017 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:27,733 INFO L93 Difference]: Finished difference Result 1420 states and 2078 transitions. [2021-05-02 23:02:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:02:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 232 [2021-05-02 23:02:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:27,736 INFO L225 Difference]: With dead ends: 1420 [2021-05-02 23:02:27,736 INFO L226 Difference]: Without dead ends: 771 [2021-05-02 23:02:27,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=570, Invalid=762, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:02:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-05-02 23:02:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 739. [2021-05-02 23:02:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 638 states have (on average 1.347962382445141) internal successors, (860), 638 states have internal predecessors, (860), 96 states have call successors, (96), 6 states have call predecessors, (96), 4 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-05-02 23:02:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1050 transitions. [2021-05-02 23:02:27,772 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1050 transitions. Word has length 232 [2021-05-02 23:02:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:27,773 INFO L480 AbstractCegarLoop]: Abstraction has 739 states and 1050 transitions. [2021-05-02 23:02:27,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1050 transitions. [2021-05-02 23:02:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-05-02 23:02:27,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:27,775 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:27,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:02:27,775 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1620078195, now seen corresponding path program 30 times [2021-05-02 23:02:27,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:27,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797963288] [2021-05-02 23:02:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:27,780 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:27,781 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:28,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:28,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-05-02 23:02:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:28,276 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:28,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797963288] [2021-05-02 23:02:28,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [797963288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:28,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:28,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:02:28,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883204675] [2021-05-02 23:02:28,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:02:28,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:28,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:02:28,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:02:28,279 INFO L87 Difference]: Start difference. First operand 739 states and 1050 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:29,319 INFO L93 Difference]: Finished difference Result 1464 states and 2143 transitions. [2021-05-02 23:02:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:02:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 239 [2021-05-02 23:02:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:29,322 INFO L225 Difference]: With dead ends: 1464 [2021-05-02 23:02:29,322 INFO L226 Difference]: Without dead ends: 794 [2021-05-02 23:02:29,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=604, Invalid=802, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:02:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-05-02 23:02:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 762. [2021-05-02 23:02:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 658 states have (on average 1.3480243161094225) internal successors, (887), 658 states have internal predecessors, (887), 99 states have call successors, (99), 6 states have call predecessors, (99), 4 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-02 23:02:29,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1083 transitions. [2021-05-02 23:02:29,353 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1083 transitions. Word has length 239 [2021-05-02 23:02:29,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:29,354 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 1083 transitions. [2021-05-02 23:02:29,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1083 transitions. [2021-05-02 23:02:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-02 23:02:29,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:29,356 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:29,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:02:29,356 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:29,356 INFO L82 PathProgramCache]: Analyzing trace with hash 91770275, now seen corresponding path program 31 times [2021-05-02 23:02:29,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:29,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589018454] [2021-05-02 23:02:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:29,360 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,361 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:29,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:29,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-05-02 23:02:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:29,887 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:29,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589018454] [2021-05-02 23:02:29,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1589018454] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:29,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:29,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:02:29,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446067260] [2021-05-02 23:02:29,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:02:29,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:29,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:02:29,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:02:29,889 INFO L87 Difference]: Start difference. First operand 762 states and 1083 transitions. Second operand has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:31,011 INFO L93 Difference]: Finished difference Result 1508 states and 2208 transitions. [2021-05-02 23:02:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:02:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 246 [2021-05-02 23:02:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:31,030 INFO L225 Difference]: With dead ends: 1508 [2021-05-02 23:02:31,030 INFO L226 Difference]: Without dead ends: 817 [2021-05-02 23:02:31,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=639, Invalid=843, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:02:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-05-02 23:02:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 785. [2021-05-02 23:02:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 678 states have (on average 1.3480825958702065) internal successors, (914), 678 states have internal predecessors, (914), 102 states have call successors, (102), 6 states have call predecessors, (102), 4 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-05-02 23:02:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1116 transitions. [2021-05-02 23:02:31,094 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1116 transitions. Word has length 246 [2021-05-02 23:02:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:31,094 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 1116 transitions. [2021-05-02 23:02:31,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1116 transitions. [2021-05-02 23:02:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-05-02 23:02:31,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:31,110 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:31,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:02:31,110 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1490557129, now seen corresponding path program 32 times [2021-05-02 23:02:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:31,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095708790] [2021-05-02 23:02:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:31,115 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:31,116 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:31,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:31,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2021-05-02 23:02:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:31,612 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:31,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095708790] [2021-05-02 23:02:31,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095708790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:31,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:31,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:02:31,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540481957] [2021-05-02 23:02:31,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:02:31,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:31,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:02:31,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:02:31,613 INFO L87 Difference]: Start difference. First operand 785 states and 1116 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:32,486 INFO L93 Difference]: Finished difference Result 1552 states and 2273 transitions. [2021-05-02 23:02:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:02:32,486 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2021-05-02 23:02:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:32,489 INFO L225 Difference]: With dead ends: 1552 [2021-05-02 23:02:32,489 INFO L226 Difference]: Without dead ends: 840 [2021-05-02 23:02:32,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=675, Invalid=885, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:02:32,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-05-02 23:02:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 808. [2021-05-02 23:02:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 698 states have (on average 1.348137535816619) internal successors, (941), 698 states have internal predecessors, (941), 105 states have call successors, (105), 6 states have call predecessors, (105), 4 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-02 23:02:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1149 transitions. [2021-05-02 23:02:32,526 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1149 transitions. Word has length 253 [2021-05-02 23:02:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:32,526 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 1149 transitions. [2021-05-02 23:02:32,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1149 transitions. [2021-05-02 23:02:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-02 23:02:32,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:32,528 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:32,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:02:32,529 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1926723481, now seen corresponding path program 33 times [2021-05-02 23:02:32,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:32,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959059064] [2021-05-02 23:02:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:32,533 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:32,534 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-05-02 23:02:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:33,073 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:33,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959059064] [2021-05-02 23:02:33,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [959059064] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:33,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:33,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:02:33,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367208082] [2021-05-02 23:02:33,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:02:33,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:33,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:02:33,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:02:33,075 INFO L87 Difference]: Start difference. First operand 808 states and 1149 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:34,231 INFO L93 Difference]: Finished difference Result 1596 states and 2338 transitions. [2021-05-02 23:02:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:02:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 260 [2021-05-02 23:02:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:34,234 INFO L225 Difference]: With dead ends: 1596 [2021-05-02 23:02:34,234 INFO L226 Difference]: Without dead ends: 863 [2021-05-02 23:02:34,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 452.6ms TimeCoverageRelationStatistics Valid=712, Invalid=928, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:02:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-05-02 23:02:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 831. [2021-05-02 23:02:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 718 states have (on average 1.3481894150417828) internal successors, (968), 718 states have internal predecessors, (968), 108 states have call successors, (108), 6 states have call predecessors, (108), 4 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2021-05-02 23:02:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1182 transitions. [2021-05-02 23:02:34,272 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1182 transitions. Word has length 260 [2021-05-02 23:02:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:34,272 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1182 transitions. [2021-05-02 23:02:34,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1182 transitions. [2021-05-02 23:02:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-05-02 23:02:34,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:34,274 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:34,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:02:34,275 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1996010491, now seen corresponding path program 34 times [2021-05-02 23:02:34,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:34,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394328266] [2021-05-02 23:02:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:34,279 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:34,280 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:34,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:34,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2021-05-02 23:02:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:34,899 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:34,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394328266] [2021-05-02 23:02:34,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394328266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:34,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:34,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:02:34,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221777694] [2021-05-02 23:02:34,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:02:34,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:34,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:02:34,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:02:34,901 INFO L87 Difference]: Start difference. First operand 831 states and 1182 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:36,093 INFO L93 Difference]: Finished difference Result 1640 states and 2403 transitions. [2021-05-02 23:02:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:02:36,094 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 267 [2021-05-02 23:02:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:36,098 INFO L225 Difference]: With dead ends: 1640 [2021-05-02 23:02:36,098 INFO L226 Difference]: Without dead ends: 886 [2021-05-02 23:02:36,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 553.3ms TimeCoverageRelationStatistics Valid=750, Invalid=972, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:02:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-05-02 23:02:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 854. [2021-05-02 23:02:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 738 states have (on average 1.348238482384824) internal successors, (995), 738 states have internal predecessors, (995), 111 states have call successors, (111), 6 states have call predecessors, (111), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2021-05-02 23:02:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1215 transitions. [2021-05-02 23:02:36,157 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1215 transitions. Word has length 267 [2021-05-02 23:02:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:36,158 INFO L480 AbstractCegarLoop]: Abstraction has 854 states and 1215 transitions. [2021-05-02 23:02:36,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1215 transitions. [2021-05-02 23:02:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-02 23:02:36,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:36,161 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:36,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:02:36,161 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash 101824299, now seen corresponding path program 35 times [2021-05-02 23:02:36,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:36,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307871620] [2021-05-02 23:02:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:36,166 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:36,168 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:36,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:36,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-05-02 23:02:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:36,896 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:36,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307871620] [2021-05-02 23:02:36,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [307871620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:36,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:36,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:02:36,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719005396] [2021-05-02 23:02:36,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:02:36,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:36,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:02:36,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:02:36,897 INFO L87 Difference]: Start difference. First operand 854 states and 1215 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:38,141 INFO L93 Difference]: Finished difference Result 1684 states and 2468 transitions. [2021-05-02 23:02:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:02:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 274 [2021-05-02 23:02:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:38,145 INFO L225 Difference]: With dead ends: 1684 [2021-05-02 23:02:38,145 INFO L226 Difference]: Without dead ends: 909 [2021-05-02 23:02:38,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=789, Invalid=1017, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:02:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-05-02 23:02:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 877. [2021-05-02 23:02:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 758 states have (on average 1.3482849604221636) internal successors, (1022), 758 states have internal predecessors, (1022), 114 states have call successors, (114), 6 states have call predecessors, (114), 4 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2021-05-02 23:02:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1248 transitions. [2021-05-02 23:02:38,202 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1248 transitions. Word has length 274 [2021-05-02 23:02:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:38,203 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 1248 transitions. [2021-05-02 23:02:38,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:38,203 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1248 transitions. [2021-05-02 23:02:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-05-02 23:02:38,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:38,205 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:38,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:02:38,205 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash 31320897, now seen corresponding path program 36 times [2021-05-02 23:02:38,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:38,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207294790] [2021-05-02 23:02:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:38,211 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:38,212 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:38,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:38,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2021-05-02 23:02:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:38,929 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:38,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207294790] [2021-05-02 23:02:38,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1207294790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:38,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:38,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:02:38,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153035931] [2021-05-02 23:02:38,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:02:38,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:38,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:02:38,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:02:38,930 INFO L87 Difference]: Start difference. First operand 877 states and 1248 transitions. Second operand has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:40,217 INFO L93 Difference]: Finished difference Result 1728 states and 2533 transitions. [2021-05-02 23:02:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:02:40,218 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 281 [2021-05-02 23:02:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:40,221 INFO L225 Difference]: With dead ends: 1728 [2021-05-02 23:02:40,221 INFO L226 Difference]: Without dead ends: 932 [2021-05-02 23:02:40,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 672.4ms TimeCoverageRelationStatistics Valid=829, Invalid=1063, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-05-02 23:02:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 900. [2021-05-02 23:02:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 778 states have (on average 1.3483290488431876) internal successors, (1049), 778 states have internal predecessors, (1049), 117 states have call successors, (117), 6 states have call predecessors, (117), 4 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-02 23:02:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1281 transitions. [2021-05-02 23:02:40,265 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1281 transitions. Word has length 281 [2021-05-02 23:02:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:40,265 INFO L480 AbstractCegarLoop]: Abstraction has 900 states and 1281 transitions. [2021-05-02 23:02:40,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1281 transitions. [2021-05-02 23:02:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-05-02 23:02:40,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:40,267 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:40,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:02:40,267 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:40,268 INFO L82 PathProgramCache]: Analyzing trace with hash 252910063, now seen corresponding path program 37 times [2021-05-02 23:02:40,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:40,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869451904] [2021-05-02 23:02:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:40,272 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:40,273 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:40,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:40,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2021-05-02 23:02:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:40,962 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:40,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869451904] [2021-05-02 23:02:40,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869451904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:40,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:40,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:02:40,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395553908] [2021-05-02 23:02:40,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:02:40,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:40,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:02:40,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:02:40,964 INFO L87 Difference]: Start difference. First operand 900 states and 1281 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:42,412 INFO L93 Difference]: Finished difference Result 1772 states and 2598 transitions. [2021-05-02 23:02:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:02:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 288 [2021-05-02 23:02:42,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:42,417 INFO L225 Difference]: With dead ends: 1772 [2021-05-02 23:02:42,417 INFO L226 Difference]: Without dead ends: 955 [2021-05-02 23:02:42,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=870, Invalid=1110, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:02:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-05-02 23:02:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 923. [2021-05-02 23:02:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 798 states have (on average 1.3483709273182958) internal successors, (1076), 798 states have internal predecessors, (1076), 120 states have call successors, (120), 6 states have call predecessors, (120), 4 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2021-05-02 23:02:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1314 transitions. [2021-05-02 23:02:42,480 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1314 transitions. Word has length 288 [2021-05-02 23:02:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:42,480 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 1314 transitions. [2021-05-02 23:02:42,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1314 transitions. [2021-05-02 23:02:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-05-02 23:02:42,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:42,482 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:42,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:02:42,483 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1967344003, now seen corresponding path program 38 times [2021-05-02 23:02:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:42,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920369518] [2021-05-02 23:02:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:42,489 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:42,513 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:43,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:43,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2021-05-02 23:02:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:43,318 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:43,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920369518] [2021-05-02 23:02:43,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [920369518] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:43,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:43,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:02:43,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966261686] [2021-05-02 23:02:43,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:02:43,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:43,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:02:43,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:43,320 INFO L87 Difference]: Start difference. First operand 923 states and 1314 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:45,147 INFO L93 Difference]: Finished difference Result 1816 states and 2663 transitions. [2021-05-02 23:02:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:02:45,148 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 295 [2021-05-02 23:02:45,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:45,151 INFO L225 Difference]: With dead ends: 1816 [2021-05-02 23:02:45,151 INFO L226 Difference]: Without dead ends: 978 [2021-05-02 23:02:45,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=912, Invalid=1158, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:02:45,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-05-02 23:02:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 946. [2021-05-02 23:02:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 818 states have (on average 1.3484107579462103) internal successors, (1103), 818 states have internal predecessors, (1103), 123 states have call successors, (123), 6 states have call predecessors, (123), 4 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2021-05-02 23:02:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1347 transitions. [2021-05-02 23:02:45,218 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1347 transitions. Word has length 295 [2021-05-02 23:02:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:45,218 INFO L480 AbstractCegarLoop]: Abstraction has 946 states and 1347 transitions. [2021-05-02 23:02:45,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1347 transitions. [2021-05-02 23:02:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-05-02 23:02:45,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:45,221 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:45,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:02:45,221 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:45,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash 596373683, now seen corresponding path program 39 times [2021-05-02 23:02:45,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:45,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282216668] [2021-05-02 23:02:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:45,227 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:45,228 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:46,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:46,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2021-05-02 23:02:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:46,108 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:46,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282216668] [2021-05-02 23:02:46,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282216668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:46,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:46,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:02:46,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274883407] [2021-05-02 23:02:46,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:02:46,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:46,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:02:46,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:02:46,110 INFO L87 Difference]: Start difference. First operand 946 states and 1347 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:47,767 INFO L93 Difference]: Finished difference Result 1860 states and 2728 transitions. [2021-05-02 23:02:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:02:47,768 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 302 [2021-05-02 23:02:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:47,771 INFO L225 Difference]: With dead ends: 1860 [2021-05-02 23:02:47,771 INFO L226 Difference]: Without dead ends: 1001 [2021-05-02 23:02:47,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 817.3ms TimeCoverageRelationStatistics Valid=955, Invalid=1207, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:02:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-05-02 23:02:47,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 969. [2021-05-02 23:02:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 838 states have (on average 1.3484486873508352) internal successors, (1130), 838 states have internal predecessors, (1130), 126 states have call successors, (126), 6 states have call predecessors, (126), 4 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2021-05-02 23:02:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1380 transitions. [2021-05-02 23:02:47,838 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1380 transitions. Word has length 302 [2021-05-02 23:02:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:47,839 INFO L480 AbstractCegarLoop]: Abstraction has 969 states and 1380 transitions. [2021-05-02 23:02:47,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1380 transitions. [2021-05-02 23:02:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-05-02 23:02:47,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:47,842 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:47,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:02:47,842 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:47,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1015311801, now seen corresponding path program 40 times [2021-05-02 23:02:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:47,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282164902] [2021-05-02 23:02:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:47,850 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:47,851 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:48,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:48,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2021-05-02 23:02:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:48,762 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:48,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282164902] [2021-05-02 23:02:48,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [282164902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:48,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:48,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:02:48,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196959775] [2021-05-02 23:02:48,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:02:48,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:48,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:02:48,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:02:48,764 INFO L87 Difference]: Start difference. First operand 969 states and 1380 transitions. Second operand has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:50,332 INFO L93 Difference]: Finished difference Result 1904 states and 2793 transitions. [2021-05-02 23:02:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:02:50,332 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 309 [2021-05-02 23:02:50,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:50,335 INFO L225 Difference]: With dead ends: 1904 [2021-05-02 23:02:50,336 INFO L226 Difference]: Without dead ends: 1024 [2021-05-02 23:02:50,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 849.7ms TimeCoverageRelationStatistics Valid=999, Invalid=1257, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:02:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-05-02 23:02:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 992. [2021-05-02 23:02:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 858 states have (on average 1.3484848484848484) internal successors, (1157), 858 states have internal predecessors, (1157), 129 states have call successors, (129), 6 states have call predecessors, (129), 4 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-02 23:02:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1413 transitions. [2021-05-02 23:02:50,392 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1413 transitions. Word has length 309 [2021-05-02 23:02:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:50,392 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1413 transitions. [2021-05-02 23:02:50,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1413 transitions. [2021-05-02 23:02:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-05-02 23:02:50,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:50,395 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:50,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:02:50,395 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1062959991, now seen corresponding path program 41 times [2021-05-02 23:02:50,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:50,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420137672] [2021-05-02 23:02:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:50,399 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:50,400 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:51,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:51,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 301 [2021-05-02 23:02:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:51,321 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:51,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420137672] [2021-05-02 23:02:51,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [420137672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:51,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:51,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:02:51,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426264311] [2021-05-02 23:02:51,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:02:51,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:51,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:02:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:02:51,323 INFO L87 Difference]: Start difference. First operand 992 states and 1413 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:53,251 INFO L93 Difference]: Finished difference Result 1948 states and 2858 transitions. [2021-05-02 23:02:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:02:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 316 [2021-05-02 23:02:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:53,254 INFO L225 Difference]: With dead ends: 1948 [2021-05-02 23:02:53,255 INFO L226 Difference]: Without dead ends: 1047 [2021-05-02 23:02:53,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 847.0ms TimeCoverageRelationStatistics Valid=1044, Invalid=1308, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:02:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-05-02 23:02:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1015. [2021-05-02 23:02:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 878 states have (on average 1.3485193621867881) internal successors, (1184), 878 states have internal predecessors, (1184), 132 states have call successors, (132), 6 states have call predecessors, (132), 4 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2021-05-02 23:02:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1446 transitions. [2021-05-02 23:02:53,309 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1446 transitions. Word has length 316 [2021-05-02 23:02:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:53,309 INFO L480 AbstractCegarLoop]: Abstraction has 1015 states and 1446 transitions. [2021-05-02 23:02:53,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:53,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1446 transitions. [2021-05-02 23:02:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-05-02 23:02:53,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:53,311 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:53,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:02:53,312 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:53,312 INFO L82 PathProgramCache]: Analyzing trace with hash -577384203, now seen corresponding path program 42 times [2021-05-02 23:02:53,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:53,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771009707] [2021-05-02 23:02:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:53,316 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:53,317 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:54,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:54,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2021-05-02 23:02:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:54,241 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:54,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771009707] [2021-05-02 23:02:54,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [771009707] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:54,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:54,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:02:54,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957820399] [2021-05-02 23:02:54,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:02:54,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:54,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:02:54,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:02:54,243 INFO L87 Difference]: Start difference. First operand 1015 states and 1446 transitions. Second operand has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:55,711 INFO L93 Difference]: Finished difference Result 1992 states and 2923 transitions. [2021-05-02 23:02:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:02:55,712 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 323 [2021-05-02 23:02:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:55,715 INFO L225 Difference]: With dead ends: 1992 [2021-05-02 23:02:55,715 INFO L226 Difference]: Without dead ends: 1070 [2021-05-02 23:02:55,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 863.4ms TimeCoverageRelationStatistics Valid=1090, Invalid=1360, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:02:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-05-02 23:02:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1038. [2021-05-02 23:02:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 898 states have (on average 1.3485523385300668) internal successors, (1211), 898 states have internal predecessors, (1211), 135 states have call successors, (135), 6 states have call predecessors, (135), 4 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2021-05-02 23:02:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1479 transitions. [2021-05-02 23:02:55,772 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1479 transitions. Word has length 323 [2021-05-02 23:02:55,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:55,772 INFO L480 AbstractCegarLoop]: Abstraction has 1038 states and 1479 transitions. [2021-05-02 23:02:55,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:55,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1479 transitions. [2021-05-02 23:02:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-05-02 23:02:55,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:55,774 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:55,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:02:55,775 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:55,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:55,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2099185093, now seen corresponding path program 43 times [2021-05-02 23:02:55,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:55,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525553664] [2021-05-02 23:02:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:55,779 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:55,782 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:56,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:56,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-05-02 23:02:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:56,756 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:56,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525553664] [2021-05-02 23:02:56,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1525553664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:56,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:56,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:02:56,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4973627] [2021-05-02 23:02:56,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:02:56,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:02:56,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:02:56,758 INFO L87 Difference]: Start difference. First operand 1038 states and 1479 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:58,836 INFO L93 Difference]: Finished difference Result 2036 states and 2988 transitions. [2021-05-02 23:02:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:02:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 330 [2021-05-02 23:02:58,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:58,839 INFO L225 Difference]: With dead ends: 2036 [2021-05-02 23:02:58,839 INFO L226 Difference]: Without dead ends: 1093 [2021-05-02 23:02:58,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 941.0ms TimeCoverageRelationStatistics Valid=1137, Invalid=1413, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:02:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-05-02 23:02:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1061. [2021-05-02 23:02:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 918 states have (on average 1.3485838779956427) internal successors, (1238), 918 states have internal predecessors, (1238), 138 states have call successors, (138), 6 states have call predecessors, (138), 4 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-02 23:02:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1512 transitions. [2021-05-02 23:02:58,898 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1512 transitions. Word has length 330 [2021-05-02 23:02:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:58,899 INFO L480 AbstractCegarLoop]: Abstraction has 1061 states and 1512 transitions. [2021-05-02 23:02:58,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1512 transitions. [2021-05-02 23:02:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-05-02 23:02:58,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:58,901 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:58,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:02:58,901 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:58,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:58,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1037148209, now seen corresponding path program 44 times [2021-05-02 23:02:58,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:58,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348608899] [2021-05-02 23:02:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:58,905 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:58,906 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2021-05-02 23:02:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:59,914 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:59,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348608899] [2021-05-02 23:02:59,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [348608899] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:59,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:59,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:02:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692226715] [2021-05-02 23:02:59,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:02:59,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:02:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:02:59,916 INFO L87 Difference]: Start difference. First operand 1061 states and 1512 transitions. Second operand has 50 states, 50 states have (on average 2.22) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:01,911 INFO L93 Difference]: Finished difference Result 2080 states and 3053 transitions. [2021-05-02 23:03:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:03:01,912 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 337 [2021-05-02 23:03:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:01,914 INFO L225 Difference]: With dead ends: 2080 [2021-05-02 23:03:01,915 INFO L226 Difference]: Without dead ends: 1116 [2021-05-02 23:03:01,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 965.6ms TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:03:01,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-05-02 23:03:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1084. [2021-05-02 23:03:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 938 states have (on average 1.3486140724946696) internal successors, (1265), 938 states have internal predecessors, (1265), 141 states have call successors, (141), 6 states have call predecessors, (141), 4 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-02 23:03:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1545 transitions. [2021-05-02 23:03:01,976 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1545 transitions. Word has length 337 [2021-05-02 23:03:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:01,977 INFO L480 AbstractCegarLoop]: Abstraction has 1084 states and 1545 transitions. [2021-05-02 23:03:01,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1545 transitions. [2021-05-02 23:03:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-05-02 23:03:01,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:01,979 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:01,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:03:01,979 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:01,980 INFO L82 PathProgramCache]: Analyzing trace with hash -688149249, now seen corresponding path program 45 times [2021-05-02 23:03:01,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:01,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522347771] [2021-05-02 23:03:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:01,984 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:01,985 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:02,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:03,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 329 [2021-05-02 23:03:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:03,008 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:03,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522347771] [2021-05-02 23:03:03,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522347771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:03,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:03,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:03:03,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535754998] [2021-05-02 23:03:03,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:03:03,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:03:03,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:03:03,009 INFO L87 Difference]: Start difference. First operand 1084 states and 1545 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:04,885 INFO L93 Difference]: Finished difference Result 2124 states and 3118 transitions. [2021-05-02 23:03:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:03:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 344 [2021-05-02 23:03:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:04,888 INFO L225 Difference]: With dead ends: 2124 [2021-05-02 23:03:04,888 INFO L226 Difference]: Without dead ends: 1139 [2021-05-02 23:03:04,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 977.3ms TimeCoverageRelationStatistics Valid=1234, Invalid=1522, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:03:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-05-02 23:03:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1107. [2021-05-02 23:03:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 958 states have (on average 1.3486430062630481) internal successors, (1292), 958 states have internal predecessors, (1292), 144 states have call successors, (144), 6 states have call predecessors, (144), 4 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2021-05-02 23:03:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1578 transitions. [2021-05-02 23:03:04,952 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1578 transitions. Word has length 344 [2021-05-02 23:03:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:04,953 INFO L480 AbstractCegarLoop]: Abstraction has 1107 states and 1578 transitions. [2021-05-02 23:03:04,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1578 transitions. [2021-05-02 23:03:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-05-02 23:03:04,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:04,955 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:04,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:03:04,955 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:04,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1835492499, now seen corresponding path program 46 times [2021-05-02 23:03:04,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:04,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623140122] [2021-05-02 23:03:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:04,959 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:04,961 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:06,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:06,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2021-05-02 23:03:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:06,151 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:06,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623140122] [2021-05-02 23:03:06,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [623140122] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:06,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:06,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:03:06,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446592827] [2021-05-02 23:03:06,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:03:06,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:06,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:03:06,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:03:06,153 INFO L87 Difference]: Start difference. First operand 1107 states and 1578 transitions. Second operand has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:08,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:08,292 INFO L93 Difference]: Finished difference Result 2168 states and 3183 transitions. [2021-05-02 23:03:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:03:08,293 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 351 [2021-05-02 23:03:08,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:08,295 INFO L225 Difference]: With dead ends: 2168 [2021-05-02 23:03:08,295 INFO L226 Difference]: Without dead ends: 1162 [2021-05-02 23:03:08,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1146.5ms TimeCoverageRelationStatistics Valid=1284, Invalid=1578, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:03:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-05-02 23:03:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1130. [2021-05-02 23:03:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 978 states have (on average 1.3486707566462168) internal successors, (1319), 978 states have internal predecessors, (1319), 147 states have call successors, (147), 6 states have call predecessors, (147), 4 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2021-05-02 23:03:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1611 transitions. [2021-05-02 23:03:08,363 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1611 transitions. Word has length 351 [2021-05-02 23:03:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:08,364 INFO L480 AbstractCegarLoop]: Abstraction has 1130 states and 1611 transitions. [2021-05-02 23:03:08,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:08,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1611 transitions. [2021-05-02 23:03:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-05-02 23:03:08,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:08,367 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:08,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:03:08,367 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1861561405, now seen corresponding path program 47 times [2021-05-02 23:03:08,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:08,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31924656] [2021-05-02 23:03:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:08,371 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:08,372 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:09,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:09,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2021-05-02 23:03:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:09,497 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:09,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31924656] [2021-05-02 23:03:09,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [31924656] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:09,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:09,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:03:09,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867901761] [2021-05-02 23:03:09,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:03:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:09,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:03:09,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:03:09,499 INFO L87 Difference]: Start difference. First operand 1130 states and 1611 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:11,388 INFO L93 Difference]: Finished difference Result 2212 states and 3248 transitions. [2021-05-02 23:03:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:03:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 358 [2021-05-02 23:03:11,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:11,392 INFO L225 Difference]: With dead ends: 2212 [2021-05-02 23:03:11,392 INFO L226 Difference]: Without dead ends: 1185 [2021-05-02 23:03:11,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1081.2ms TimeCoverageRelationStatistics Valid=1335, Invalid=1635, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:03:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-05-02 23:03:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1153. [2021-05-02 23:03:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 998 states have (on average 1.348697394789579) internal successors, (1346), 998 states have internal predecessors, (1346), 150 states have call successors, (150), 6 states have call predecessors, (150), 4 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2021-05-02 23:03:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1644 transitions. [2021-05-02 23:03:11,498 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1644 transitions. Word has length 358 [2021-05-02 23:03:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:11,498 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1644 transitions. [2021-05-02 23:03:11,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1644 transitions. [2021-05-02 23:03:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-05-02 23:03:11,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:11,501 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:11,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:03:11,502 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:11,502 INFO L82 PathProgramCache]: Analyzing trace with hash -758414679, now seen corresponding path program 48 times [2021-05-02 23:03:11,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:11,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793120716] [2021-05-02 23:03:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:11,506 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:11,507 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:12,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:12,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2021-05-02 23:03:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:12,682 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:12,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793120716] [2021-05-02 23:03:12,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [793120716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:12,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:12,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:03:12,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240954859] [2021-05-02 23:03:12,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:03:12,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:12,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:03:12,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:03:12,684 INFO L87 Difference]: Start difference. First operand 1153 states and 1644 transitions. Second operand has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:14,908 INFO L93 Difference]: Finished difference Result 2256 states and 3313 transitions. [2021-05-02 23:03:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:03:14,908 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 365 [2021-05-02 23:03:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:14,911 INFO L225 Difference]: With dead ends: 2256 [2021-05-02 23:03:14,911 INFO L226 Difference]: Without dead ends: 1208 [2021-05-02 23:03:14,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1125.8ms TimeCoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:03:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-05-02 23:03:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1176. [2021-05-02 23:03:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1018 states have (on average 1.3487229862475443) internal successors, (1373), 1018 states have internal predecessors, (1373), 153 states have call successors, (153), 6 states have call predecessors, (153), 4 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2021-05-02 23:03:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1677 transitions. [2021-05-02 23:03:14,987 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1677 transitions. Word has length 365 [2021-05-02 23:03:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:14,987 INFO L480 AbstractCegarLoop]: Abstraction has 1176 states and 1677 transitions. [2021-05-02 23:03:14,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1677 transitions. [2021-05-02 23:03:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-05-02 23:03:14,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:14,990 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:14,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:03:14,991 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:14,991 INFO L82 PathProgramCache]: Analyzing trace with hash 384675463, now seen corresponding path program 49 times [2021-05-02 23:03:14,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:14,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710386560] [2021-05-02 23:03:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:14,995 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:14,996 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:16,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:16,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2021-05-02 23:03:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:16,245 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:16,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710386560] [2021-05-02 23:03:16,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1710386560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:16,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:16,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:03:16,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358006811] [2021-05-02 23:03:16,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:03:16,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:16,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:03:16,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:03:16,246 INFO L87 Difference]: Start difference. First operand 1176 states and 1677 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:18,542 INFO L93 Difference]: Finished difference Result 2300 states and 3378 transitions. [2021-05-02 23:03:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:03:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 372 [2021-05-02 23:03:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:18,545 INFO L225 Difference]: With dead ends: 2300 [2021-05-02 23:03:18,545 INFO L226 Difference]: Without dead ends: 1231 [2021-05-02 23:03:18,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1196.9ms TimeCoverageRelationStatistics Valid=1440, Invalid=1752, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:03:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-05-02 23:03:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1199. [2021-05-02 23:03:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1038 states have (on average 1.348747591522158) internal successors, (1400), 1038 states have internal predecessors, (1400), 156 states have call successors, (156), 6 states have call predecessors, (156), 4 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2021-05-02 23:03:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1710 transitions. [2021-05-02 23:03:18,623 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1710 transitions. Word has length 372 [2021-05-02 23:03:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:18,623 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 1710 transitions. [2021-05-02 23:03:18,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1710 transitions. [2021-05-02 23:03:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-05-02 23:03:18,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:18,626 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:18,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:03:18,626 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash 315299301, now seen corresponding path program 50 times [2021-05-02 23:03:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:18,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449151045] [2021-05-02 23:03:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:18,630 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:18,631 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:19,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:19,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2021-05-02 23:03:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:19,927 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:19,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449151045] [2021-05-02 23:03:19,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449151045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:19,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:19,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:03:19,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644669197] [2021-05-02 23:03:19,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:03:19,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:19,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:03:19,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:03:19,928 INFO L87 Difference]: Start difference. First operand 1199 states and 1710 transitions. Second operand has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:22,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:22,304 INFO L93 Difference]: Finished difference Result 2344 states and 3443 transitions. [2021-05-02 23:03:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:03:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 379 [2021-05-02 23:03:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:22,307 INFO L225 Difference]: With dead ends: 2344 [2021-05-02 23:03:22,307 INFO L226 Difference]: Without dead ends: 1254 [2021-05-02 23:03:22,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1244.7ms TimeCoverageRelationStatistics Valid=1494, Invalid=1812, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:03:22,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-05-02 23:03:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1222. [2021-05-02 23:03:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1058 states have (on average 1.3487712665406428) internal successors, (1427), 1058 states have internal predecessors, (1427), 159 states have call successors, (159), 6 states have call predecessors, (159), 4 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2021-05-02 23:03:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1743 transitions. [2021-05-02 23:03:22,389 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1743 transitions. Word has length 379 [2021-05-02 23:03:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:22,389 INFO L480 AbstractCegarLoop]: Abstraction has 1222 states and 1743 transitions. [2021-05-02 23:03:22,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1743 transitions. [2021-05-02 23:03:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-05-02 23:03:22,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:22,392 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:22,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:03:22,393 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:22,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2096923317, now seen corresponding path program 51 times [2021-05-02 23:03:22,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:22,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357187750] [2021-05-02 23:03:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:22,397 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:22,398 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:23,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:23,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 371 [2021-05-02 23:03:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:23,795 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:23,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357187750] [2021-05-02 23:03:23,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [357187750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:23,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:23,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:03:23,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338240763] [2021-05-02 23:03:23,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:03:23,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:23,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:03:23,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:03:23,797 INFO L87 Difference]: Start difference. First operand 1222 states and 1743 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:26,200 INFO L93 Difference]: Finished difference Result 2388 states and 3508 transitions. [2021-05-02 23:03:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:03:26,200 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 386 [2021-05-02 23:03:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:26,203 INFO L225 Difference]: With dead ends: 2388 [2021-05-02 23:03:26,203 INFO L226 Difference]: Without dead ends: 1277 [2021-05-02 23:03:26,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1311.1ms TimeCoverageRelationStatistics Valid=1549, Invalid=1873, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:03:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-05-02 23:03:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1245. [2021-05-02 23:03:26,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1078 states have (on average 1.3487940630797774) internal successors, (1454), 1078 states have internal predecessors, (1454), 162 states have call successors, (162), 6 states have call predecessors, (162), 4 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-02 23:03:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1776 transitions. [2021-05-02 23:03:26,291 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1776 transitions. Word has length 386 [2021-05-02 23:03:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:26,291 INFO L480 AbstractCegarLoop]: Abstraction has 1245 states and 1776 transitions. [2021-05-02 23:03:26,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1776 transitions. [2021-05-02 23:03:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-05-02 23:03:26,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:26,295 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:26,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:03:26,295 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash -529001183, now seen corresponding path program 52 times [2021-05-02 23:03:26,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:26,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815546366] [2021-05-02 23:03:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:26,299 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:26,300 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:27,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:27,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2021-05-02 23:03:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:27,711 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:27,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815546366] [2021-05-02 23:03:27,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815546366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:27,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:27,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:03:27,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436973030] [2021-05-02 23:03:27,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:03:27,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:27,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:03:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:03:27,713 INFO L87 Difference]: Start difference. First operand 1245 states and 1776 transitions. Second operand has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:29,747 INFO L93 Difference]: Finished difference Result 2432 states and 3573 transitions. [2021-05-02 23:03:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:03:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 393 [2021-05-02 23:03:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:29,750 INFO L225 Difference]: With dead ends: 2432 [2021-05-02 23:03:29,750 INFO L226 Difference]: Without dead ends: 1300 [2021-05-02 23:03:29,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1353.0ms TimeCoverageRelationStatistics Valid=1605, Invalid=1935, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:03:29,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-05-02 23:03:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1268. [2021-05-02 23:03:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1098 states have (on average 1.348816029143898) internal successors, (1481), 1098 states have internal predecessors, (1481), 165 states have call successors, (165), 6 states have call predecessors, (165), 4 states have return successors, (163), 163 states have call predecessors, (163), 163 states have call successors, (163) [2021-05-02 23:03:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1809 transitions. [2021-05-02 23:03:29,838 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1809 transitions. Word has length 393 [2021-05-02 23:03:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:29,838 INFO L480 AbstractCegarLoop]: Abstraction has 1268 states and 1809 transitions. [2021-05-02 23:03:29,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1809 transitions. [2021-05-02 23:03:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-05-02 23:03:29,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:29,841 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:29,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:03:29,841 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:29,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1210810383, now seen corresponding path program 53 times [2021-05-02 23:03:29,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:29,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184437827] [2021-05-02 23:03:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:29,846 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:29,847 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:31,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:31,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 385 [2021-05-02 23:03:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:31,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:31,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184437827] [2021-05-02 23:03:31,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184437827] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:31,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:31,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:03:31,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150282894] [2021-05-02 23:03:31,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:03:31,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:31,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:03:31,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:03:31,288 INFO L87 Difference]: Start difference. First operand 1268 states and 1809 transitions. Second operand has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:33,435 INFO L93 Difference]: Finished difference Result 2476 states and 3638 transitions. [2021-05-02 23:03:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:03:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 400 [2021-05-02 23:03:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:33,438 INFO L225 Difference]: With dead ends: 2476 [2021-05-02 23:03:33,438 INFO L226 Difference]: Without dead ends: 1323 [2021-05-02 23:03:33,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1358.0ms TimeCoverageRelationStatistics Valid=1662, Invalid=1998, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:03:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-05-02 23:03:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1291. [2021-05-02 23:03:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1118 states have (on average 1.3488372093023255) internal successors, (1508), 1118 states have internal predecessors, (1508), 168 states have call successors, (168), 6 states have call predecessors, (168), 4 states have return successors, (166), 166 states have call predecessors, (166), 166 states have call successors, (166) [2021-05-02 23:03:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1842 transitions. [2021-05-02 23:03:33,529 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1842 transitions. Word has length 400 [2021-05-02 23:03:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:33,529 INFO L480 AbstractCegarLoop]: Abstraction has 1291 states and 1842 transitions. [2021-05-02 23:03:33,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1842 transitions. [2021-05-02 23:03:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-05-02 23:03:33,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:33,532 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:33,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:03:33,532 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1624031139, now seen corresponding path program 54 times [2021-05-02 23:03:33,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:33,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955385453] [2021-05-02 23:03:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:33,536 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:33,537 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:34,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:35,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2021-05-02 23:03:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:35,019 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:35,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955385453] [2021-05-02 23:03:35,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [955385453] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:35,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:35,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:03:35,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235196529] [2021-05-02 23:03:35,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:03:35,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:03:35,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:03:35,021 INFO L87 Difference]: Start difference. First operand 1291 states and 1842 transitions. Second operand has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:37,456 INFO L93 Difference]: Finished difference Result 2520 states and 3703 transitions. [2021-05-02 23:03:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:03:37,457 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 407 [2021-05-02 23:03:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:37,460 INFO L225 Difference]: With dead ends: 2520 [2021-05-02 23:03:37,460 INFO L226 Difference]: Without dead ends: 1346 [2021-05-02 23:03:37,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1417.1ms TimeCoverageRelationStatistics Valid=1720, Invalid=2062, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:03:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-05-02 23:03:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1314. [2021-05-02 23:03:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1138 states have (on average 1.3488576449912126) internal successors, (1535), 1138 states have internal predecessors, (1535), 171 states have call successors, (171), 6 states have call predecessors, (171), 4 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2021-05-02 23:03:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1875 transitions. [2021-05-02 23:03:37,581 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1875 transitions. Word has length 407 [2021-05-02 23:03:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:37,581 INFO L480 AbstractCegarLoop]: Abstraction has 1314 states and 1875 transitions. [2021-05-02 23:03:37,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1875 transitions. [2021-05-02 23:03:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-05-02 23:03:37,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:37,585 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:37,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:03:37,585 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:37,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:37,585 INFO L82 PathProgramCache]: Analyzing trace with hash -708512045, now seen corresponding path program 55 times [2021-05-02 23:03:37,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:37,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260392836] [2021-05-02 23:03:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:37,589 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:37,590 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:39,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:39,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 399 [2021-05-02 23:03:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:39,100 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:39,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260392836] [2021-05-02 23:03:39,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [260392836] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:39,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:39,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:03:39,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794386309] [2021-05-02 23:03:39,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:03:39,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:03:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:03:39,101 INFO L87 Difference]: Start difference. First operand 1314 states and 1875 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:41,753 INFO L93 Difference]: Finished difference Result 2564 states and 3768 transitions. [2021-05-02 23:03:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:03:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 414 [2021-05-02 23:03:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:41,756 INFO L225 Difference]: With dead ends: 2564 [2021-05-02 23:03:41,756 INFO L226 Difference]: Without dead ends: 1369 [2021-05-02 23:03:41,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1421.8ms TimeCoverageRelationStatistics Valid=1779, Invalid=2127, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:03:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-05-02 23:03:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1337. [2021-05-02 23:03:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1158 states have (on average 1.3488773747841105) internal successors, (1562), 1158 states have internal predecessors, (1562), 174 states have call successors, (174), 6 states have call predecessors, (174), 4 states have return successors, (172), 172 states have call predecessors, (172), 172 states have call successors, (172) [2021-05-02 23:03:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1908 transitions. [2021-05-02 23:03:41,924 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1908 transitions. Word has length 414 [2021-05-02 23:03:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:41,924 INFO L480 AbstractCegarLoop]: Abstraction has 1337 states and 1908 transitions. [2021-05-02 23:03:41,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1908 transitions. [2021-05-02 23:03:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-05-02 23:03:41,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:41,928 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:41,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:03:41,928 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash -472033383, now seen corresponding path program 56 times [2021-05-02 23:03:41,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:41,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12599427] [2021-05-02 23:03:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:41,932 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:41,934 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:43,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:43,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2021-05-02 23:03:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:43,508 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:43,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12599427] [2021-05-02 23:03:43,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [12599427] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:43,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:43,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:03:43,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470558371] [2021-05-02 23:03:43,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:03:43,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:03:43,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:03:43,510 INFO L87 Difference]: Start difference. First operand 1337 states and 1908 transitions. Second operand has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:46,217 INFO L93 Difference]: Finished difference Result 2608 states and 3833 transitions. [2021-05-02 23:03:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:03:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 421 [2021-05-02 23:03:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:46,220 INFO L225 Difference]: With dead ends: 2608 [2021-05-02 23:03:46,220 INFO L226 Difference]: Without dead ends: 1392 [2021-05-02 23:03:46,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1511.3ms TimeCoverageRelationStatistics Valid=1839, Invalid=2193, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:03:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-05-02 23:03:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1360. [2021-05-02 23:03:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1178 states have (on average 1.3488964346349746) internal successors, (1589), 1178 states have internal predecessors, (1589), 177 states have call successors, (177), 6 states have call predecessors, (177), 4 states have return successors, (175), 175 states have call predecessors, (175), 175 states have call successors, (175) [2021-05-02 23:03:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1941 transitions. [2021-05-02 23:03:46,322 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1941 transitions. Word has length 421 [2021-05-02 23:03:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:46,322 INFO L480 AbstractCegarLoop]: Abstraction has 1360 states and 1941 transitions. [2021-05-02 23:03:46,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1941 transitions. [2021-05-02 23:03:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-05-02 23:03:46,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:46,325 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:46,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:03:46,325 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:46,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1001333143, now seen corresponding path program 57 times [2021-05-02 23:03:46,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:46,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571176855] [2021-05-02 23:03:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:46,329 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:46,330 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:47,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:48,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2021-05-02 23:03:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:48,023 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:48,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571176855] [2021-05-02 23:03:48,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [571176855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:48,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:48,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:03:48,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632554715] [2021-05-02 23:03:48,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:03:48,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:48,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:03:48,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:03:48,024 INFO L87 Difference]: Start difference. First operand 1360 states and 1941 transitions. Second operand has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:50,468 INFO L93 Difference]: Finished difference Result 2652 states and 3898 transitions. [2021-05-02 23:03:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:03:50,468 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 428 [2021-05-02 23:03:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:50,472 INFO L225 Difference]: With dead ends: 2652 [2021-05-02 23:03:50,472 INFO L226 Difference]: Without dead ends: 1415 [2021-05-02 23:03:50,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1634.2ms TimeCoverageRelationStatistics Valid=1900, Invalid=2260, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:03:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-05-02 23:03:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1383. [2021-05-02 23:03:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1198 states have (on average 1.348914858096828) internal successors, (1616), 1198 states have internal predecessors, (1616), 180 states have call successors, (180), 6 states have call predecessors, (180), 4 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) [2021-05-02 23:03:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1974 transitions. [2021-05-02 23:03:50,587 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1974 transitions. Word has length 428 [2021-05-02 23:03:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:50,587 INFO L480 AbstractCegarLoop]: Abstraction has 1383 states and 1974 transitions. [2021-05-02 23:03:50,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1974 transitions. [2021-05-02 23:03:50,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-05-02 23:03:50,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:50,591 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:50,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:03:50,591 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:50,592 INFO L82 PathProgramCache]: Analyzing trace with hash -791209259, now seen corresponding path program 58 times [2021-05-02 23:03:50,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:50,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992756739] [2021-05-02 23:03:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:50,596 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:50,597 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:52,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:52,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2021-05-02 23:03:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:52,375 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:52,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992756739] [2021-05-02 23:03:52,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [992756739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:52,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:52,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:03:52,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320168289] [2021-05-02 23:03:52,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:03:52,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:52,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:03:52,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:03:52,376 INFO L87 Difference]: Start difference. First operand 1383 states and 1974 transitions. Second operand has 64 states, 64 states have (on average 2.171875) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:54,759 INFO L93 Difference]: Finished difference Result 2696 states and 3963 transitions. [2021-05-02 23:03:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:03:54,760 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 435 [2021-05-02 23:03:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:54,762 INFO L225 Difference]: With dead ends: 2696 [2021-05-02 23:03:54,762 INFO L226 Difference]: Without dead ends: 1438 [2021-05-02 23:03:54,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1713.9ms TimeCoverageRelationStatistics Valid=1962, Invalid=2328, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:03:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-05-02 23:03:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1406. [2021-05-02 23:03:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1218 states have (on average 1.3489326765188834) internal successors, (1643), 1218 states have internal predecessors, (1643), 183 states have call successors, (183), 6 states have call predecessors, (183), 4 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2021-05-02 23:03:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 2007 transitions. [2021-05-02 23:03:54,879 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 2007 transitions. Word has length 435 [2021-05-02 23:03:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:54,879 INFO L480 AbstractCegarLoop]: Abstraction has 1406 states and 2007 transitions. [2021-05-02 23:03:54,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 2007 transitions. [2021-05-02 23:03:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-05-02 23:03:54,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:54,885 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:54,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:03:54,885 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash -834060197, now seen corresponding path program 59 times [2021-05-02 23:03:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:54,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80663464] [2021-05-02 23:03:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:54,889 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:54,895 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:56,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:56,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 427 [2021-05-02 23:03:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:56,723 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:56,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80663464] [2021-05-02 23:03:56,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [80663464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:56,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:56,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:03:56,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184669814] [2021-05-02 23:03:56,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:03:56,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:03:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:03:56,725 INFO L87 Difference]: Start difference. First operand 1406 states and 2007 transitions. Second operand has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:59,765 INFO L93 Difference]: Finished difference Result 2740 states and 4028 transitions. [2021-05-02 23:03:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:03:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 442 [2021-05-02 23:03:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:59,768 INFO L225 Difference]: With dead ends: 2740 [2021-05-02 23:03:59,768 INFO L226 Difference]: Without dead ends: 1461 [2021-05-02 23:03:59,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1748.4ms TimeCoverageRelationStatistics Valid=2025, Invalid=2397, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:03:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-05-02 23:03:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1429. [2021-05-02 23:03:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1238 states have (on average 1.3489499192245558) internal successors, (1670), 1238 states have internal predecessors, (1670), 186 states have call successors, (186), 6 states have call predecessors, (186), 4 states have return successors, (184), 184 states have call predecessors, (184), 184 states have call successors, (184) [2021-05-02 23:03:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 2040 transitions. [2021-05-02 23:03:59,884 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 2040 transitions. Word has length 442 [2021-05-02 23:03:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:59,884 INFO L480 AbstractCegarLoop]: Abstraction has 1429 states and 2040 transitions. [2021-05-02 23:03:59,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 2040 transitions. [2021-05-02 23:03:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-05-02 23:03:59,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:59,887 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:59,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:03:59,888 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:59,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1912687121, now seen corresponding path program 60 times [2021-05-02 23:03:59,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:59,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158946517] [2021-05-02 23:03:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:59,892 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:59,894 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:01,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:01,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2021-05-02 23:04:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:01,822 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:01,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158946517] [2021-05-02 23:04:01,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [158946517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:01,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:01,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:04:01,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140737944] [2021-05-02 23:04:01,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:04:01,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:04:01,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:04:01,824 INFO L87 Difference]: Start difference. First operand 1429 states and 2040 transitions. Second operand has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:05,261 INFO L93 Difference]: Finished difference Result 2784 states and 4093 transitions. [2021-05-02 23:04:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:04:05,262 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 449 [2021-05-02 23:04:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:05,264 INFO L225 Difference]: With dead ends: 2784 [2021-05-02 23:04:05,264 INFO L226 Difference]: Without dead ends: 1484 [2021-05-02 23:04:05,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1781.0ms TimeCoverageRelationStatistics Valid=2089, Invalid=2467, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:04:05,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-05-02 23:04:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1452. [2021-05-02 23:04:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1258 states have (on average 1.348966613672496) internal successors, (1697), 1258 states have internal predecessors, (1697), 189 states have call successors, (189), 6 states have call predecessors, (189), 4 states have return successors, (187), 187 states have call predecessors, (187), 187 states have call successors, (187) [2021-05-02 23:04:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2073 transitions. [2021-05-02 23:04:05,505 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2073 transitions. Word has length 449 [2021-05-02 23:04:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:05,505 INFO L480 AbstractCegarLoop]: Abstraction has 1452 states and 2073 transitions. [2021-05-02 23:04:05,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2073 transitions. [2021-05-02 23:04:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-05-02 23:04:05,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:05,508 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:05,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:04:05,508 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash -898460897, now seen corresponding path program 61 times [2021-05-02 23:04:05,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:05,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177241266] [2021-05-02 23:04:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:05,514 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:05,515 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:07,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:07,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2021-05-02 23:04:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:07,501 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:07,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177241266] [2021-05-02 23:04:07,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [177241266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:07,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:07,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:04:07,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683596821] [2021-05-02 23:04:07,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:04:07,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:04:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:04:07,502 INFO L87 Difference]: Start difference. First operand 1452 states and 2073 transitions. Second operand has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:11,068 INFO L93 Difference]: Finished difference Result 2828 states and 4158 transitions. [2021-05-02 23:04:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:04:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 456 [2021-05-02 23:04:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:11,071 INFO L225 Difference]: With dead ends: 2828 [2021-05-02 23:04:11,071 INFO L226 Difference]: Without dead ends: 1507 [2021-05-02 23:04:11,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1897.5ms TimeCoverageRelationStatistics Valid=2154, Invalid=2538, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:04:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-05-02 23:04:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1475. [2021-05-02 23:04:11,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1278 states have (on average 1.3489827856025038) internal successors, (1724), 1278 states have internal predecessors, (1724), 192 states have call successors, (192), 6 states have call predecessors, (192), 4 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2021-05-02 23:04:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2106 transitions. [2021-05-02 23:04:11,241 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2106 transitions. Word has length 456 [2021-05-02 23:04:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:11,242 INFO L480 AbstractCegarLoop]: Abstraction has 1475 states and 2106 transitions. [2021-05-02 23:04:11,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2106 transitions. [2021-05-02 23:04:11,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-05-02 23:04:11,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:11,245 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:11,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:04:11,245 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash 415016269, now seen corresponding path program 62 times [2021-05-02 23:04:11,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:11,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450642959] [2021-05-02 23:04:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:11,249 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:11,250 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:13,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:13,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2021-05-02 23:04:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:13,213 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:13,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450642959] [2021-05-02 23:04:13,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450642959] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:13,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:13,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:04:13,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881635744] [2021-05-02 23:04:13,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:04:13,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:13,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:04:13,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:04:13,214 INFO L87 Difference]: Start difference. First operand 1475 states and 2106 transitions. Second operand has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:16,174 INFO L93 Difference]: Finished difference Result 2872 states and 4223 transitions. [2021-05-02 23:04:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:04:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 463 [2021-05-02 23:04:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:16,177 INFO L225 Difference]: With dead ends: 2872 [2021-05-02 23:04:16,177 INFO L226 Difference]: Without dead ends: 1530 [2021-05-02 23:04:16,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1892.3ms TimeCoverageRelationStatistics Valid=2220, Invalid=2610, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:04:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-05-02 23:04:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1498. [2021-05-02 23:04:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1298 states have (on average 1.3489984591679507) internal successors, (1751), 1298 states have internal predecessors, (1751), 195 states have call successors, (195), 6 states have call predecessors, (195), 4 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2021-05-02 23:04:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2139 transitions. [2021-05-02 23:04:16,310 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2139 transitions. Word has length 463 [2021-05-02 23:04:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:16,310 INFO L480 AbstractCegarLoop]: Abstraction has 1498 states and 2139 transitions. [2021-05-02 23:04:16,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2139 transitions. [2021-05-02 23:04:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-05-02 23:04:16,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:16,314 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:16,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:04:16,314 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:16,314 INFO L82 PathProgramCache]: Analyzing trace with hash -108373533, now seen corresponding path program 63 times [2021-05-02 23:04:16,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:16,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281339234] [2021-05-02 23:04:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:16,329 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,330 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:18,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:18,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 455 [2021-05-02 23:04:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:18,340 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:18,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281339234] [2021-05-02 23:04:18,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [281339234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:18,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:18,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:04:18,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502989461] [2021-05-02 23:04:18,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:04:18,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:18,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:04:18,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:04:18,342 INFO L87 Difference]: Start difference. First operand 1498 states and 2139 transitions. Second operand has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:21,308 INFO L93 Difference]: Finished difference Result 2916 states and 4288 transitions. [2021-05-02 23:04:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:04:21,309 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 470 [2021-05-02 23:04:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:21,311 INFO L225 Difference]: With dead ends: 2916 [2021-05-02 23:04:21,311 INFO L226 Difference]: Without dead ends: 1553 [2021-05-02 23:04:21,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1870.3ms TimeCoverageRelationStatistics Valid=2287, Invalid=2683, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:04:21,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-05-02 23:04:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1521. [2021-05-02 23:04:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1318 states have (on average 1.3490136570561457) internal successors, (1778), 1318 states have internal predecessors, (1778), 198 states have call successors, (198), 6 states have call predecessors, (198), 4 states have return successors, (196), 196 states have call predecessors, (196), 196 states have call successors, (196) [2021-05-02 23:04:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2172 transitions. [2021-05-02 23:04:21,444 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2172 transitions. Word has length 470 [2021-05-02 23:04:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:21,444 INFO L480 AbstractCegarLoop]: Abstraction has 1521 states and 2172 transitions. [2021-05-02 23:04:21,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2172 transitions. [2021-05-02 23:04:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-05-02 23:04:21,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:21,447 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:21,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:04:21,447 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:21,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1209406327, now seen corresponding path program 64 times [2021-05-02 23:04:21,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:21,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960114865] [2021-05-02 23:04:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:21,451 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:21,452 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:23,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:23,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2021-05-02 23:04:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:23,563 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:23,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960114865] [2021-05-02 23:04:23,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1960114865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:23,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:23,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:04:23,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676880675] [2021-05-02 23:04:23,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:04:23,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:23,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:04:23,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:04:23,564 INFO L87 Difference]: Start difference. First operand 1521 states and 2172 transitions. Second operand has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:26,703 INFO L93 Difference]: Finished difference Result 2960 states and 4353 transitions. [2021-05-02 23:04:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:04:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 477 [2021-05-02 23:04:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:26,706 INFO L225 Difference]: With dead ends: 2960 [2021-05-02 23:04:26,706 INFO L226 Difference]: Without dead ends: 1576 [2021-05-02 23:04:26,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2044.7ms TimeCoverageRelationStatistics Valid=2355, Invalid=2757, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:04:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-05-02 23:04:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1544. [2021-05-02 23:04:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1338 states have (on average 1.3490284005979074) internal successors, (1805), 1338 states have internal predecessors, (1805), 201 states have call successors, (201), 6 states have call predecessors, (201), 4 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2021-05-02 23:04:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2205 transitions. [2021-05-02 23:04:26,849 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2205 transitions. Word has length 477 [2021-05-02 23:04:26,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:26,849 INFO L480 AbstractCegarLoop]: Abstraction has 1544 states and 2205 transitions. [2021-05-02 23:04:26,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:26,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2205 transitions. [2021-05-02 23:04:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-05-02 23:04:26,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:26,852 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:26,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:04:26,853 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1433392295, now seen corresponding path program 65 times [2021-05-02 23:04:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:26,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571611046] [2021-05-02 23:04:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:26,869 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:26,870 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:28,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:28,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 469 [2021-05-02 23:04:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:28,641 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:28,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571611046] [2021-05-02 23:04:28,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571611046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:28,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:28,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:04:28,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295160615] [2021-05-02 23:04:28,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:04:28,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:28,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:04:28,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:04:28,642 INFO L87 Difference]: Start difference. First operand 1544 states and 2205 transitions. Second operand has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:31,735 INFO L93 Difference]: Finished difference Result 3004 states and 4418 transitions. [2021-05-02 23:04:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:04:31,735 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 484 [2021-05-02 23:04:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:31,738 INFO L225 Difference]: With dead ends: 3004 [2021-05-02 23:04:31,738 INFO L226 Difference]: Without dead ends: 1599 [2021-05-02 23:04:31,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1687.0ms TimeCoverageRelationStatistics Valid=2424, Invalid=2832, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:04:31,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-05-02 23:04:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1567. [2021-05-02 23:04:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1358 states have (on average 1.3490427098674522) internal successors, (1832), 1358 states have internal predecessors, (1832), 204 states have call successors, (204), 6 states have call predecessors, (204), 4 states have return successors, (202), 202 states have call predecessors, (202), 202 states have call successors, (202) [2021-05-02 23:04:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2238 transitions. [2021-05-02 23:04:31,935 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2238 transitions. Word has length 484 [2021-05-02 23:04:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:31,935 INFO L480 AbstractCegarLoop]: Abstraction has 1567 states and 2238 transitions. [2021-05-02 23:04:31,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2238 transitions. [2021-05-02 23:04:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-05-02 23:04:31,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:31,939 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:31,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:04:31,939 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1072291781, now seen corresponding path program 66 times [2021-05-02 23:04:31,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:31,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41474322] [2021-05-02 23:04:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:31,943 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:31,944 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:34,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:34,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2021-05-02 23:04:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:34,186 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:34,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41474322] [2021-05-02 23:04:34,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [41474322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:34,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:34,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:04:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71770537] [2021-05-02 23:04:34,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:04:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:04:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:04:34,187 INFO L87 Difference]: Start difference. First operand 1567 states and 2238 transitions. Second operand has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:37,835 INFO L93 Difference]: Finished difference Result 3048 states and 4483 transitions. [2021-05-02 23:04:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:04:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 491 [2021-05-02 23:04:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:37,839 INFO L225 Difference]: With dead ends: 3048 [2021-05-02 23:04:37,839 INFO L226 Difference]: Without dead ends: 1622 [2021-05-02 23:04:37,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2151.9ms TimeCoverageRelationStatistics Valid=2494, Invalid=2908, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:04:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-05-02 23:04:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1590. [2021-05-02 23:04:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1378 states have (on average 1.349056603773585) internal successors, (1859), 1378 states have internal predecessors, (1859), 207 states have call successors, (207), 6 states have call predecessors, (207), 4 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2021-05-02 23:04:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2271 transitions. [2021-05-02 23:04:38,084 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2271 transitions. Word has length 491 [2021-05-02 23:04:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:38,084 INFO L480 AbstractCegarLoop]: Abstraction has 1590 states and 2271 transitions. [2021-05-02 23:04:38,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2271 transitions. [2021-05-02 23:04:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-05-02 23:04:38,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:38,088 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:38,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:04:38,089 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:38,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:38,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1400749205, now seen corresponding path program 67 times [2021-05-02 23:04:38,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:38,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424180097] [2021-05-02 23:04:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:38,094 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:38,095 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:40,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:40,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 483 [2021-05-02 23:04:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:40,431 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:40,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424180097] [2021-05-02 23:04:40,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1424180097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:40,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:40,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:04:40,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182272140] [2021-05-02 23:04:40,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:04:40,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:40,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:04:40,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:04:40,433 INFO L87 Difference]: Start difference. First operand 1590 states and 2271 transitions. Second operand has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:43,947 INFO L93 Difference]: Finished difference Result 3092 states and 4548 transitions. [2021-05-02 23:04:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:04:43,948 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 498 [2021-05-02 23:04:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:43,951 INFO L225 Difference]: With dead ends: 3092 [2021-05-02 23:04:43,951 INFO L226 Difference]: Without dead ends: 1645 [2021-05-02 23:04:43,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2220.9ms TimeCoverageRelationStatistics Valid=2565, Invalid=2985, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:04:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-05-02 23:04:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1613. [2021-05-02 23:04:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1398 states have (on average 1.3490701001430616) internal successors, (1886), 1398 states have internal predecessors, (1886), 210 states have call successors, (210), 6 states have call predecessors, (210), 4 states have return successors, (208), 208 states have call predecessors, (208), 208 states have call successors, (208) [2021-05-02 23:04:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2304 transitions. [2021-05-02 23:04:44,144 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2304 transitions. Word has length 498 [2021-05-02 23:04:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:44,146 INFO L480 AbstractCegarLoop]: Abstraction has 1613 states and 2304 transitions. [2021-05-02 23:04:44,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:44,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2304 transitions. [2021-05-02 23:04:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-05-02 23:04:44,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:44,150 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:44,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:04:44,150 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:44,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash -90358015, now seen corresponding path program 68 times [2021-05-02 23:04:44,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:44,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095918918] [2021-05-02 23:04:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:44,159 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:44,160 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:46,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:46,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2021-05-02 23:04:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:46,632 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:46,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095918918] [2021-05-02 23:04:46,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095918918] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:46,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:46,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:04:46,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800926020] [2021-05-02 23:04:46,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:04:46,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:04:46,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:04:46,634 INFO L87 Difference]: Start difference. First operand 1613 states and 2304 transitions. Second operand has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:50,738 INFO L93 Difference]: Finished difference Result 3136 states and 4613 transitions. [2021-05-02 23:04:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:04:50,739 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 505 [2021-05-02 23:04:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:50,741 INFO L225 Difference]: With dead ends: 3136 [2021-05-02 23:04:50,741 INFO L226 Difference]: Without dead ends: 1668 [2021-05-02 23:04:50,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2312.0ms TimeCoverageRelationStatistics Valid=2637, Invalid=3063, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:04:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-05-02 23:04:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1636. [2021-05-02 23:04:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1418 states have (on average 1.349083215796897) internal successors, (1913), 1418 states have internal predecessors, (1913), 213 states have call successors, (213), 6 states have call predecessors, (213), 4 states have return successors, (211), 211 states have call predecessors, (211), 211 states have call successors, (211) [2021-05-02 23:04:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2337 transitions. [2021-05-02 23:04:50,943 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2337 transitions. Word has length 505 [2021-05-02 23:04:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:50,943 INFO L480 AbstractCegarLoop]: Abstraction has 1636 states and 2337 transitions. [2021-05-02 23:04:50,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2337 transitions. [2021-05-02 23:04:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-05-02 23:04:50,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:50,947 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:50,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:04:50,947 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1168172591, now seen corresponding path program 69 times [2021-05-02 23:04:50,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:50,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325548833] [2021-05-02 23:04:50,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:50,951 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:50,952 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:53,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:53,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 497 [2021-05-02 23:04:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:53,321 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:53,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325548833] [2021-05-02 23:04:53,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325548833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:53,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:53,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:04:53,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891219307] [2021-05-02 23:04:53,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:04:53,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:04:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:04:53,330 INFO L87 Difference]: Start difference. First operand 1636 states and 2337 transitions. Second operand has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:57,256 INFO L93 Difference]: Finished difference Result 3180 states and 4678 transitions. [2021-05-02 23:04:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:04:57,256 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 512 [2021-05-02 23:04:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:57,259 INFO L225 Difference]: With dead ends: 3180 [2021-05-02 23:04:57,259 INFO L226 Difference]: Without dead ends: 1691 [2021-05-02 23:04:57,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2286.6ms TimeCoverageRelationStatistics Valid=2710, Invalid=3142, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:04:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-05-02 23:04:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1659. [2021-05-02 23:04:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1438 states have (on average 1.349095966620306) internal successors, (1940), 1438 states have internal predecessors, (1940), 216 states have call successors, (216), 6 states have call predecessors, (216), 4 states have return successors, (214), 214 states have call predecessors, (214), 214 states have call successors, (214) [2021-05-02 23:04:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2370 transitions. [2021-05-02 23:04:57,485 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2370 transitions. Word has length 512 [2021-05-02 23:04:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:57,485 INFO L480 AbstractCegarLoop]: Abstraction has 1659 states and 2370 transitions. [2021-05-02 23:04:57,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2370 transitions. [2021-05-02 23:04:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-05-02 23:04:57,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:57,489 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:57,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:04:57,489 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash -412825027, now seen corresponding path program 70 times [2021-05-02 23:04:57,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:57,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821743503] [2021-05-02 23:04:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:57,494 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:57,495 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:59,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:00,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2021-05-02 23:05:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:00,002 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:00,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821743503] [2021-05-02 23:05:00,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821743503] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:00,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:00,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:05:00,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043108538] [2021-05-02 23:05:00,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:05:00,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:05:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=2995, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:05:00,003 INFO L87 Difference]: Start difference. First operand 1659 states and 2370 transitions. Second operand has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:04,585 INFO L93 Difference]: Finished difference Result 3224 states and 4743 transitions. [2021-05-02 23:05:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:05:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 519 [2021-05-02 23:05:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:04,589 INFO L225 Difference]: With dead ends: 3224 [2021-05-02 23:05:04,589 INFO L226 Difference]: Without dead ends: 1714 [2021-05-02 23:05:04,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2431.0ms TimeCoverageRelationStatistics Valid=2784, Invalid=3222, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:05:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-05-02 23:05:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1682. [2021-05-02 23:05:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1458 states have (on average 1.3491083676268862) internal successors, (1967), 1458 states have internal predecessors, (1967), 219 states have call successors, (219), 6 states have call predecessors, (219), 4 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2021-05-02 23:05:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2403 transitions. [2021-05-02 23:05:04,881 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2403 transitions. Word has length 519 [2021-05-02 23:05:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:04,881 INFO L480 AbstractCegarLoop]: Abstraction has 1682 states and 2403 transitions. [2021-05-02 23:05:04,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2403 transitions. [2021-05-02 23:05:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-05-02 23:05:04,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:04,886 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:04,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:05:04,886 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:04,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2077557517, now seen corresponding path program 71 times [2021-05-02 23:05:04,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:04,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473568308] [2021-05-02 23:05:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:04,892 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:04,893 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:07,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:07,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 511 [2021-05-02 23:05:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:07,550 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:07,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473568308] [2021-05-02 23:05:07,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473568308] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:07,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:07,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:05:07,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257253427] [2021-05-02 23:05:07,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:05:07,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:07,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:05:07,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:05:07,552 INFO L87 Difference]: Start difference. First operand 1682 states and 2403 transitions. Second operand has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:12,403 INFO L93 Difference]: Finished difference Result 3268 states and 4808 transitions. [2021-05-02 23:05:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:05:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 526 [2021-05-02 23:05:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:12,407 INFO L225 Difference]: With dead ends: 3268 [2021-05-02 23:05:12,407 INFO L226 Difference]: Without dead ends: 1737 [2021-05-02 23:05:12,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2536.7ms TimeCoverageRelationStatistics Valid=2859, Invalid=3303, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:05:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-05-02 23:05:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1705. [2021-05-02 23:05:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1478 states have (on average 1.3491204330175914) internal successors, (1994), 1478 states have internal predecessors, (1994), 222 states have call successors, (222), 6 states have call predecessors, (222), 4 states have return successors, (220), 220 states have call predecessors, (220), 220 states have call successors, (220) [2021-05-02 23:05:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2436 transitions. [2021-05-02 23:05:12,636 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2436 transitions. Word has length 526 [2021-05-02 23:05:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:12,636 INFO L480 AbstractCegarLoop]: Abstraction has 1705 states and 2436 transitions. [2021-05-02 23:05:12,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2436 transitions. [2021-05-02 23:05:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-05-02 23:05:12,640 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:12,640 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:12,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:05:12,641 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:12,641 INFO L82 PathProgramCache]: Analyzing trace with hash 388055417, now seen corresponding path program 72 times [2021-05-02 23:05:12,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:12,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031361453] [2021-05-02 23:05:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:12,645 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:12,646 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:15,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:15,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2021-05-02 23:05:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:15,557 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:15,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031361453] [2021-05-02 23:05:15,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031361453] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:15,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:15,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:05:15,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062984142] [2021-05-02 23:05:15,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:05:15,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:15,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:05:15,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=3152, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:05:15,559 INFO L87 Difference]: Start difference. First operand 1705 states and 2436 transitions. Second operand has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:20,380 INFO L93 Difference]: Finished difference Result 3312 states and 4873 transitions. [2021-05-02 23:05:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:05:20,381 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 533 [2021-05-02 23:05:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:20,384 INFO L225 Difference]: With dead ends: 3312 [2021-05-02 23:05:20,384 INFO L226 Difference]: Without dead ends: 1760 [2021-05-02 23:05:20,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2821.6ms TimeCoverageRelationStatistics Valid=2935, Invalid=3385, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:05:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-05-02 23:05:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1728. [2021-05-02 23:05:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1498 states have (on average 1.34913217623498) internal successors, (2021), 1498 states have internal predecessors, (2021), 225 states have call successors, (225), 6 states have call predecessors, (225), 4 states have return successors, (223), 223 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-02 23:05:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2469 transitions. [2021-05-02 23:05:20,608 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2469 transitions. Word has length 533 [2021-05-02 23:05:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:20,608 INFO L480 AbstractCegarLoop]: Abstraction has 1728 states and 2469 transitions. [2021-05-02 23:05:20,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2469 transitions. [2021-05-02 23:05:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-05-02 23:05:20,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:20,613 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:20,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:05:20,613 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:20,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1946171465, now seen corresponding path program 73 times [2021-05-02 23:05:20,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:20,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166389967] [2021-05-02 23:05:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:20,618 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:20,619 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:23,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:23,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 525 [2021-05-02 23:05:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:23,548 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:23,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166389967] [2021-05-02 23:05:23,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [166389967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:23,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:23,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:05:23,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665237266] [2021-05-02 23:05:23,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:05:23,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:23,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:05:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:05:23,550 INFO L87 Difference]: Start difference. First operand 1728 states and 2469 transitions. Second operand has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:27,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:27,821 INFO L93 Difference]: Finished difference Result 3356 states and 4938 transitions. [2021-05-02 23:05:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:05:27,822 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 540 [2021-05-02 23:05:27,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:27,825 INFO L225 Difference]: With dead ends: 3356 [2021-05-02 23:05:27,825 INFO L226 Difference]: Without dead ends: 1783 [2021-05-02 23:05:27,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2831.7ms TimeCoverageRelationStatistics Valid=3012, Invalid=3468, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:05:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-05-02 23:05:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1751. [2021-05-02 23:05:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1518 states have (on average 1.3491436100131753) internal successors, (2048), 1518 states have internal predecessors, (2048), 228 states have call successors, (228), 6 states have call predecessors, (228), 4 states have return successors, (226), 226 states have call predecessors, (226), 226 states have call successors, (226) [2021-05-02 23:05:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2502 transitions. [2021-05-02 23:05:28,055 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2502 transitions. Word has length 540 [2021-05-02 23:05:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:28,055 INFO L480 AbstractCegarLoop]: Abstraction has 1751 states and 2502 transitions. [2021-05-02 23:05:28,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2502 transitions. [2021-05-02 23:05:28,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2021-05-02 23:05:28,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:28,060 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:28,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:05:28,060 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:28,060 INFO L82 PathProgramCache]: Analyzing trace with hash 137585845, now seen corresponding path program 74 times [2021-05-02 23:05:28,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:28,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472923703] [2021-05-02 23:05:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:28,065 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:28,066 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:30,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:30,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2021-05-02 23:05:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:30,830 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:30,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472923703] [2021-05-02 23:05:30,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472923703] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:30,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:30,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:05:30,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031457364] [2021-05-02 23:05:30,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:05:30,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:05:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=3313, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:05:30,831 INFO L87 Difference]: Start difference. First operand 1751 states and 2502 transitions. Second operand has 80 states, 80 states have (on average 2.1375) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:36,086 INFO L93 Difference]: Finished difference Result 3400 states and 5003 transitions. [2021-05-02 23:05:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:05:36,087 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 547 [2021-05-02 23:05:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:36,090 INFO L225 Difference]: With dead ends: 3400 [2021-05-02 23:05:36,090 INFO L226 Difference]: Without dead ends: 1806 [2021-05-02 23:05:36,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2662.2ms TimeCoverageRelationStatistics Valid=3090, Invalid=3552, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:05:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-05-02 23:05:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1774. [2021-05-02 23:05:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1538 states have (on average 1.349154746423927) internal successors, (2075), 1538 states have internal predecessors, (2075), 231 states have call successors, (231), 6 states have call predecessors, (231), 4 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2021-05-02 23:05:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2535 transitions. [2021-05-02 23:05:36,386 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2535 transitions. Word has length 547 [2021-05-02 23:05:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:36,386 INFO L480 AbstractCegarLoop]: Abstraction has 1774 states and 2535 transitions. [2021-05-02 23:05:36,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2535 transitions. [2021-05-02 23:05:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-05-02 23:05:36,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:36,390 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:36,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:05:36,391 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash -444692869, now seen corresponding path program 75 times [2021-05-02 23:05:36,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:36,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145184863] [2021-05-02 23:05:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:36,395 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:36,397 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:39,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:39,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 539 [2021-05-02 23:05:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:39,506 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:39,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145184863] [2021-05-02 23:05:39,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145184863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:39,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:39,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:05:39,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671541523] [2021-05-02 23:05:39,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:05:39,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:39,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:05:39,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3085, Invalid=3395, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:05:39,508 INFO L87 Difference]: Start difference. First operand 1774 states and 2535 transitions. Second operand has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:44,185 INFO L93 Difference]: Finished difference Result 3444 states and 5068 transitions. [2021-05-02 23:05:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:05:44,185 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 554 [2021-05-02 23:05:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:44,189 INFO L225 Difference]: With dead ends: 3444 [2021-05-02 23:05:44,189 INFO L226 Difference]: Without dead ends: 1829 [2021-05-02 23:05:44,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3012.9ms TimeCoverageRelationStatistics Valid=3169, Invalid=3637, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:05:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-05-02 23:05:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1797. [2021-05-02 23:05:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1558 states have (on average 1.3491655969191272) internal successors, (2102), 1558 states have internal predecessors, (2102), 234 states have call successors, (234), 6 states have call predecessors, (234), 4 states have return successors, (232), 232 states have call predecessors, (232), 232 states have call successors, (232) [2021-05-02 23:05:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2568 transitions. [2021-05-02 23:05:44,465 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2568 transitions. Word has length 554 [2021-05-02 23:05:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:44,465 INFO L480 AbstractCegarLoop]: Abstraction has 1797 states and 2568 transitions. [2021-05-02 23:05:44,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2568 transitions. [2021-05-02 23:05:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2021-05-02 23:05:44,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:44,470 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:44,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:05:44,470 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash 41677809, now seen corresponding path program 76 times [2021-05-02 23:05:44,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:44,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314090763] [2021-05-02 23:05:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:44,475 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:44,476 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:47,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:47,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2021-05-02 23:05:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:47,659 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:47,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314090763] [2021-05-02 23:05:47,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314090763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:47,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:47,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:05:47,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693343835] [2021-05-02 23:05:47,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:05:47,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:47,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:05:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=3478, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:05:47,661 INFO L87 Difference]: Start difference. First operand 1797 states and 2568 transitions. Second operand has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:53,595 INFO L93 Difference]: Finished difference Result 3488 states and 5133 transitions. [2021-05-02 23:05:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:05:53,596 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 561 [2021-05-02 23:05:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:53,600 INFO L225 Difference]: With dead ends: 3488 [2021-05-02 23:05:53,600 INFO L226 Difference]: Without dead ends: 1852 [2021-05-02 23:05:53,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 3070.6ms TimeCoverageRelationStatistics Valid=3249, Invalid=3723, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:05:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-05-02 23:05:53,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1820. [2021-05-02 23:05:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1578 states have (on average 1.3491761723700888) internal successors, (2129), 1578 states have internal predecessors, (2129), 237 states have call successors, (237), 6 states have call predecessors, (237), 4 states have return successors, (235), 235 states have call predecessors, (235), 235 states have call successors, (235) [2021-05-02 23:05:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2601 transitions. [2021-05-02 23:05:53,914 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2601 transitions. Word has length 561 [2021-05-02 23:05:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:53,914 INFO L480 AbstractCegarLoop]: Abstraction has 1820 states and 2601 transitions. [2021-05-02 23:05:53,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2601 transitions. [2021-05-02 23:05:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-05-02 23:05:53,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:53,918 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:53,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:05:53,918 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash 562460991, now seen corresponding path program 77 times [2021-05-02 23:05:53,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:53,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044411841] [2021-05-02 23:05:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:53,924 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:53,925 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:57,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:57,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 553 [2021-05-02 23:05:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:57,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:57,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044411841] [2021-05-02 23:05:57,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044411841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:57,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:57,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:05:57,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971806553] [2021-05-02 23:05:57,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:05:57,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:05:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:05:57,263 INFO L87 Difference]: Start difference. First operand 1820 states and 2601 transitions. Second operand has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:02,893 INFO L93 Difference]: Finished difference Result 3532 states and 5198 transitions. [2021-05-02 23:06:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:06:02,894 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 568 [2021-05-02 23:06:02,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:02,897 INFO L225 Difference]: With dead ends: 3532 [2021-05-02 23:06:02,897 INFO L226 Difference]: Without dead ends: 1875 [2021-05-02 23:06:02,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3210.4ms TimeCoverageRelationStatistics Valid=3330, Invalid=3810, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:06:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-05-02 23:06:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1843. [2021-05-02 23:06:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1598 states have (on average 1.3491864831038798) internal successors, (2156), 1598 states have internal predecessors, (2156), 240 states have call successors, (240), 6 states have call predecessors, (240), 4 states have return successors, (238), 238 states have call predecessors, (238), 238 states have call successors, (238) [2021-05-02 23:06:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2634 transitions. [2021-05-02 23:06:03,194 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2634 transitions. Word has length 568 [2021-05-02 23:06:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:03,194 INFO L480 AbstractCegarLoop]: Abstraction has 1843 states and 2634 transitions. [2021-05-02 23:06:03,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2634 transitions. [2021-05-02 23:06:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-05-02 23:06:03,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:03,199 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:03,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:06:03,199 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1935388461, now seen corresponding path program 78 times [2021-05-02 23:06:03,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:03,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126723902] [2021-05-02 23:06:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:03,204 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:03,205 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:06,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:06,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2021-05-02 23:06:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:06,459 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:06,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126723902] [2021-05-02 23:06:06,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126723902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:06,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:06,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:06:06,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414387085] [2021-05-02 23:06:06,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:06:06,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:06,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:06:06,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=3647, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:06:06,460 INFO L87 Difference]: Start difference. First operand 1843 states and 2634 transitions. Second operand has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:11,164 INFO L93 Difference]: Finished difference Result 3576 states and 5263 transitions. [2021-05-02 23:06:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:06:11,165 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 575 [2021-05-02 23:06:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:11,168 INFO L225 Difference]: With dead ends: 3576 [2021-05-02 23:06:11,168 INFO L226 Difference]: Without dead ends: 1898 [2021-05-02 23:06:11,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3146.7ms TimeCoverageRelationStatistics Valid=3412, Invalid=3898, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:06:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-05-02 23:06:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1866. [2021-05-02 23:06:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1618 states have (on average 1.3491965389369591) internal successors, (2183), 1618 states have internal predecessors, (2183), 243 states have call successors, (243), 6 states have call predecessors, (243), 4 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2021-05-02 23:06:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2667 transitions. [2021-05-02 23:06:11,425 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2667 transitions. Word has length 575 [2021-05-02 23:06:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:11,425 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 2667 transitions. [2021-05-02 23:06:11,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2667 transitions. [2021-05-02 23:06:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-05-02 23:06:11,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:11,431 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:11,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:06:11,431 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2104942595, now seen corresponding path program 79 times [2021-05-02 23:06:11,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:11,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894059859] [2021-05-02 23:06:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:11,435 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:11,437 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:14,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:14,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 567 [2021-05-02 23:06:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:14,778 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:14,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894059859] [2021-05-02 23:06:14,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [894059859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:14,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:14,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:06:14,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928232750] [2021-05-02 23:06:14,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:06:14,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:14,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:06:14,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:06:14,779 INFO L87 Difference]: Start difference. First operand 1866 states and 2667 transitions. Second operand has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:20,217 INFO L93 Difference]: Finished difference Result 3620 states and 5328 transitions. [2021-05-02 23:06:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:06:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 582 [2021-05-02 23:06:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:20,221 INFO L225 Difference]: With dead ends: 3620 [2021-05-02 23:06:20,221 INFO L226 Difference]: Without dead ends: 1921 [2021-05-02 23:06:20,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 3240.0ms TimeCoverageRelationStatistics Valid=3495, Invalid=3987, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:06:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2021-05-02 23:06:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1889. [2021-05-02 23:06:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1638 states have (on average 1.3492063492063493) internal successors, (2210), 1638 states have internal predecessors, (2210), 246 states have call successors, (246), 6 states have call predecessors, (246), 4 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2021-05-02 23:06:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2700 transitions. [2021-05-02 23:06:20,484 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2700 transitions. Word has length 582 [2021-05-02 23:06:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:20,484 INFO L480 AbstractCegarLoop]: Abstraction has 1889 states and 2700 transitions. [2021-05-02 23:06:20,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2700 transitions. [2021-05-02 23:06:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2021-05-02 23:06:20,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:20,489 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:20,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:06:20,489 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1236489833, now seen corresponding path program 80 times [2021-05-02 23:06:20,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:20,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150143892] [2021-05-02 23:06:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:20,494 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:20,495 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:23,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:23,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2021-05-02 23:06:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:23,933 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:23,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150143892] [2021-05-02 23:06:23,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [150143892] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:23,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:23,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:06:23,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276753006] [2021-05-02 23:06:23,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:06:23,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:06:23,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=3820, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:06:23,935 INFO L87 Difference]: Start difference. First operand 1889 states and 2700 transitions. Second operand has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:30,608 INFO L93 Difference]: Finished difference Result 3664 states and 5393 transitions. [2021-05-02 23:06:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:06:30,609 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 589 [2021-05-02 23:06:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:30,612 INFO L225 Difference]: With dead ends: 3664 [2021-05-02 23:06:30,612 INFO L226 Difference]: Without dead ends: 1944 [2021-05-02 23:06:30,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3313.9ms TimeCoverageRelationStatistics Valid=3579, Invalid=4077, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:06:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-05-02 23:06:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1912. [2021-05-02 23:06:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1658 states have (on average 1.3492159227985525) internal successors, (2237), 1658 states have internal predecessors, (2237), 249 states have call successors, (249), 6 states have call predecessors, (249), 4 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-05-02 23:06:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2733 transitions. [2021-05-02 23:06:30,863 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2733 transitions. Word has length 589 [2021-05-02 23:06:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:30,864 INFO L480 AbstractCegarLoop]: Abstraction has 1912 states and 2733 transitions. [2021-05-02 23:06:30,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2733 transitions. [2021-05-02 23:06:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-05-02 23:06:30,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:30,868 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:30,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:06:30,868 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2026964281, now seen corresponding path program 81 times [2021-05-02 23:06:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:30,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270345963] [2021-05-02 23:06:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:30,873 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:30,874 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:34,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:34,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 581 [2021-05-02 23:06:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:34,565 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:34,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270345963] [2021-05-02 23:06:34,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [270345963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:34,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:34,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:06:34,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715911314] [2021-05-02 23:06:34,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:06:34,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:34,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:06:34,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3574, Invalid=3908, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:06:34,568 INFO L87 Difference]: Start difference. First operand 1912 states and 2733 transitions. Second operand has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:40,777 INFO L93 Difference]: Finished difference Result 3708 states and 5458 transitions. [2021-05-02 23:06:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:06:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 596 [2021-05-02 23:06:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:40,781 INFO L225 Difference]: With dead ends: 3708 [2021-05-02 23:06:40,781 INFO L226 Difference]: Without dead ends: 1967 [2021-05-02 23:06:40,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3586.0ms TimeCoverageRelationStatistics Valid=3664, Invalid=4168, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:06:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-05-02 23:06:41,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1935. [2021-05-02 23:06:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1678 states have (on average 1.3492252681764005) internal successors, (2264), 1678 states have internal predecessors, (2264), 252 states have call successors, (252), 6 states have call predecessors, (252), 4 states have return successors, (250), 250 states have call predecessors, (250), 250 states have call successors, (250) [2021-05-02 23:06:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2766 transitions. [2021-05-02 23:06:41,033 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2766 transitions. Word has length 596 [2021-05-02 23:06:41,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:41,033 INFO L480 AbstractCegarLoop]: Abstraction has 1935 states and 2766 transitions. [2021-05-02 23:06:41,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2766 transitions. [2021-05-02 23:06:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2021-05-02 23:06:41,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:41,038 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:41,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:06:41,039 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:41,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:41,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1373874597, now seen corresponding path program 82 times [2021-05-02 23:06:41,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:41,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339243220] [2021-05-02 23:06:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:41,043 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:41,044 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:44,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:44,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2021-05-02 23:06:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:44,541 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:44,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339243220] [2021-05-02 23:06:44,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [339243220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:44,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:44,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:06:44,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966272249] [2021-05-02 23:06:44,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:06:44,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:06:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=3997, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:06:44,543 INFO L87 Difference]: Start difference. First operand 1935 states and 2766 transitions. Second operand has 88 states, 88 states have (on average 2.125) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:50,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:50,574 INFO L93 Difference]: Finished difference Result 3752 states and 5523 transitions. [2021-05-02 23:06:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:06:50,574 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.125) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 603 [2021-05-02 23:06:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:50,578 INFO L225 Difference]: With dead ends: 3752 [2021-05-02 23:06:50,578 INFO L226 Difference]: Without dead ends: 1990 [2021-05-02 23:06:50,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3383.5ms TimeCoverageRelationStatistics Valid=3750, Invalid=4260, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:06:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-05-02 23:06:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1958. [2021-05-02 23:06:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1698 states have (on average 1.3492343934040048) internal successors, (2291), 1698 states have internal predecessors, (2291), 255 states have call successors, (255), 6 states have call predecessors, (255), 4 states have return successors, (253), 253 states have call predecessors, (253), 253 states have call successors, (253) [2021-05-02 23:06:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2799 transitions. [2021-05-02 23:06:50,846 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2799 transitions. Word has length 603 [2021-05-02 23:06:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:50,846 INFO L480 AbstractCegarLoop]: Abstraction has 1958 states and 2799 transitions. [2021-05-02 23:06:50,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.125) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2799 transitions. [2021-05-02 23:06:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2021-05-02 23:06:50,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:50,851 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:50,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:06:50,851 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:50,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1056044661, now seen corresponding path program 83 times [2021-05-02 23:06:50,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:50,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493930597] [2021-05-02 23:06:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:50,856 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:50,857 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:54,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:54,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2021-05-02 23:06:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:54,475 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:54,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493930597] [2021-05-02 23:06:54,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493930597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:54,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:54,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:06:54,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587550206] [2021-05-02 23:06:54,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:06:54,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:54,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:06:54,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:06:54,477 INFO L87 Difference]: Start difference. First operand 1958 states and 2799 transitions. Second operand has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:00,538 INFO L93 Difference]: Finished difference Result 3796 states and 5588 transitions. [2021-05-02 23:07:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:07:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 610 [2021-05-02 23:07:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:00,542 INFO L225 Difference]: With dead ends: 3796 [2021-05-02 23:07:00,542 INFO L226 Difference]: Without dead ends: 2013 [2021-05-02 23:07:00,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 3511.0ms TimeCoverageRelationStatistics Valid=3837, Invalid=4353, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:07:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2021-05-02 23:07:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1981. [2021-05-02 23:07:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1718 states have (on average 1.3492433061699651) internal successors, (2318), 1718 states have internal predecessors, (2318), 258 states have call successors, (258), 6 states have call predecessors, (258), 4 states have return successors, (256), 256 states have call predecessors, (256), 256 states have call successors, (256) [2021-05-02 23:07:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2832 transitions. [2021-05-02 23:07:00,817 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2832 transitions. Word has length 610 [2021-05-02 23:07:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:00,817 INFO L480 AbstractCegarLoop]: Abstraction has 1981 states and 2832 transitions. [2021-05-02 23:07:00,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2832 transitions. [2021-05-02 23:07:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-05-02 23:07:00,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:00,822 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:00,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:07:00,822 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:00,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1848809247, now seen corresponding path program 84 times [2021-05-02 23:07:00,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:00,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764792214] [2021-05-02 23:07:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:00,832 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:00,833 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:04,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:04,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2021-05-02 23:07:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:04,195 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:04,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764792214] [2021-05-02 23:07:04,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [764792214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:04,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:04,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:07:04,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827612340] [2021-05-02 23:07:04,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:07:04,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:04,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:07:04,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=4178, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:07:04,198 INFO L87 Difference]: Start difference. First operand 1981 states and 2832 transitions. Second operand has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:10,782 INFO L93 Difference]: Finished difference Result 3840 states and 5653 transitions. [2021-05-02 23:07:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:07:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 617 [2021-05-02 23:07:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:10,787 INFO L225 Difference]: With dead ends: 3840 [2021-05-02 23:07:10,787 INFO L226 Difference]: Without dead ends: 2036 [2021-05-02 23:07:10,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 3246.2ms TimeCoverageRelationStatistics Valid=3925, Invalid=4447, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:07:10,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-05-02 23:07:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 2004. [2021-05-02 23:07:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 1738 states have (on average 1.3492520138089759) internal successors, (2345), 1738 states have internal predecessors, (2345), 261 states have call successors, (261), 6 states have call predecessors, (261), 4 states have return successors, (259), 259 states have call predecessors, (259), 259 states have call successors, (259) [2021-05-02 23:07:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2865 transitions. [2021-05-02 23:07:11,129 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2865 transitions. Word has length 617 [2021-05-02 23:07:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:11,129 INFO L480 AbstractCegarLoop]: Abstraction has 2004 states and 2865 transitions. [2021-05-02 23:07:11,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2865 transitions. [2021-05-02 23:07:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2021-05-02 23:07:11,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:11,134 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:11,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:07:11,134 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1173572687, now seen corresponding path program 85 times [2021-05-02 23:07:11,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:11,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394892250] [2021-05-02 23:07:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:11,139 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:11,140 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:14,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:15,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 609 [2021-05-02 23:07:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:15,007 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:15,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394892250] [2021-05-02 23:07:15,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394892250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:15,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:15,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:07:15,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343970205] [2021-05-02 23:07:15,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:07:15,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:15,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:07:15,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:07:15,011 INFO L87 Difference]: Start difference. First operand 2004 states and 2865 transitions. Second operand has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:22,590 INFO L93 Difference]: Finished difference Result 3884 states and 5718 transitions. [2021-05-02 23:07:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:07:22,590 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 624 [2021-05-02 23:07:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:22,594 INFO L225 Difference]: With dead ends: 3884 [2021-05-02 23:07:22,594 INFO L226 Difference]: Without dead ends: 2059 [2021-05-02 23:07:22,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3666.9ms TimeCoverageRelationStatistics Valid=4014, Invalid=4542, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:07:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-05-02 23:07:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 2027. [2021-05-02 23:07:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 1758 states have (on average 1.3492605233219568) internal successors, (2372), 1758 states have internal predecessors, (2372), 264 states have call successors, (264), 6 states have call predecessors, (264), 4 states have return successors, (262), 262 states have call predecessors, (262), 262 states have call successors, (262) [2021-05-02 23:07:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2898 transitions. [2021-05-02 23:07:22,888 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2898 transitions. Word has length 624 [2021-05-02 23:07:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:22,889 INFO L480 AbstractCegarLoop]: Abstraction has 2027 states and 2898 transitions. [2021-05-02 23:07:22,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2898 transitions. [2021-05-02 23:07:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2021-05-02 23:07:22,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:22,894 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:22,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:07:22,894 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:22,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1529785315, now seen corresponding path program 86 times [2021-05-02 23:07:22,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:22,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526899356] [2021-05-02 23:07:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:22,902 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:22,903 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:26,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:26,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2021-05-02 23:07:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:26,802 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:26,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526899356] [2021-05-02 23:07:26,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [526899356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:26,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:26,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:07:26,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99843493] [2021-05-02 23:07:26,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:07:26,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:26,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:07:26,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=4363, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:07:26,804 INFO L87 Difference]: Start difference. First operand 2027 states and 2898 transitions. Second operand has 92 states, 92 states have (on average 2.119565217391304) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:33,936 INFO L93 Difference]: Finished difference Result 3928 states and 5783 transitions. [2021-05-02 23:07:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:07:33,937 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.119565217391304) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 631 [2021-05-02 23:07:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:33,941 INFO L225 Difference]: With dead ends: 3928 [2021-05-02 23:07:33,941 INFO L226 Difference]: Without dead ends: 2082 [2021-05-02 23:07:33,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3715.4ms TimeCoverageRelationStatistics Valid=4104, Invalid=4638, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:07:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-05-02 23:07:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2050. [2021-05-02 23:07:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1778 states have (on average 1.3492688413948257) internal successors, (2399), 1778 states have internal predecessors, (2399), 267 states have call successors, (267), 6 states have call predecessors, (267), 4 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2021-05-02 23:07:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 2931 transitions. [2021-05-02 23:07:34,247 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 2931 transitions. Word has length 631 [2021-05-02 23:07:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:34,247 INFO L480 AbstractCegarLoop]: Abstraction has 2050 states and 2931 transitions. [2021-05-02 23:07:34,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.119565217391304) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 2931 transitions. [2021-05-02 23:07:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2021-05-02 23:07:34,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:34,253 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:34,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:07:34,253 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1832780563, now seen corresponding path program 87 times [2021-05-02 23:07:34,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:34,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747303437] [2021-05-02 23:07:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:34,258 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:34,259 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:38,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:38,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 623 [2021-05-02 23:07:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:38,326 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:38,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747303437] [2021-05-02 23:07:38,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [747303437] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:38,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:38,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:07:38,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133994017] [2021-05-02 23:07:38,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:07:38,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:38,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:07:38,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=4457, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:07:38,352 INFO L87 Difference]: Start difference. First operand 2050 states and 2931 transitions. Second operand has 93 states, 93 states have (on average 2.118279569892473) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:44,754 INFO L93 Difference]: Finished difference Result 3972 states and 5848 transitions. [2021-05-02 23:07:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:07:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.118279569892473) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 638 [2021-05-02 23:07:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:44,759 INFO L225 Difference]: With dead ends: 3972 [2021-05-02 23:07:44,759 INFO L226 Difference]: Without dead ends: 2105 [2021-05-02 23:07:44,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3926.6ms TimeCoverageRelationStatistics Valid=4195, Invalid=4735, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:07:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-05-02 23:07:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2073. [2021-05-02 23:07:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 1798 states have (on average 1.3492769744160178) internal successors, (2426), 1798 states have internal predecessors, (2426), 270 states have call successors, (270), 6 states have call predecessors, (270), 4 states have return successors, (268), 268 states have call predecessors, (268), 268 states have call successors, (268) [2021-05-02 23:07:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2964 transitions. [2021-05-02 23:07:45,076 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2964 transitions. Word has length 638 [2021-05-02 23:07:45,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:45,076 INFO L480 AbstractCegarLoop]: Abstraction has 2073 states and 2964 transitions. [2021-05-02 23:07:45,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.118279569892473) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2964 transitions. [2021-05-02 23:07:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2021-05-02 23:07:45,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:45,082 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:45,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:07:45,082 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:45,082 INFO L82 PathProgramCache]: Analyzing trace with hash 399518553, now seen corresponding path program 88 times [2021-05-02 23:07:45,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:45,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971847807] [2021-05-02 23:07:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:45,087 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:45,088 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:48,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:48,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2021-05-02 23:07:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:48,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:48,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971847807] [2021-05-02 23:07:48,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971847807] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:48,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:48,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:07:48,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424438976] [2021-05-02 23:07:48,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:07:48,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:07:48,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=4552, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:07:48,921 INFO L87 Difference]: Start difference. First operand 2073 states and 2964 transitions. Second operand has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:59,262 INFO L93 Difference]: Finished difference Result 4016 states and 5913 transitions. [2021-05-02 23:07:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:07:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 645 [2021-05-02 23:07:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:59,267 INFO L225 Difference]: With dead ends: 4016 [2021-05-02 23:07:59,267 INFO L226 Difference]: Without dead ends: 2128 [2021-05-02 23:07:59,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 3690.9ms TimeCoverageRelationStatistics Valid=4287, Invalid=4833, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:07:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2021-05-02 23:07:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2096. [2021-05-02 23:07:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 1818 states have (on average 1.3492849284928492) internal successors, (2453), 1818 states have internal predecessors, (2453), 273 states have call successors, (273), 6 states have call predecessors, (273), 4 states have return successors, (271), 271 states have call predecessors, (271), 271 states have call successors, (271) [2021-05-02 23:07:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2997 transitions. [2021-05-02 23:07:59,626 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2997 transitions. Word has length 645 [2021-05-02 23:07:59,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:59,626 INFO L480 AbstractCegarLoop]: Abstraction has 2096 states and 2997 transitions. [2021-05-02 23:07:59,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:07:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2997 transitions. [2021-05-02 23:07:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2021-05-02 23:07:59,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:59,633 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:59,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:07:59,633 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:59,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:59,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1858956759, now seen corresponding path program 89 times [2021-05-02 23:07:59,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:59,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25755182] [2021-05-02 23:07:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:59,639 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:59,640 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:03,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:03,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 637 [2021-05-02 23:08:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:03,634 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:03,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25755182] [2021-05-02 23:08:03,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [25755182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:03,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:03,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:08:03,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199767966] [2021-05-02 23:08:03,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:08:03,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:03,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:08:03,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:08:03,637 INFO L87 Difference]: Start difference. First operand 2096 states and 2997 transitions. Second operand has 95 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:08:13,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:13,707 INFO L93 Difference]: Finished difference Result 4060 states and 5978 transitions. [2021-05-02 23:08:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:08:13,707 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 652 [2021-05-02 23:08:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:13,712 INFO L225 Difference]: With dead ends: 4060 [2021-05-02 23:08:13,712 INFO L226 Difference]: Without dead ends: 2151 [2021-05-02 23:08:13,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3769.1ms TimeCoverageRelationStatistics Valid=4380, Invalid=4932, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:08:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-05-02 23:08:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2119. [2021-05-02 23:08:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 1838 states have (on average 1.3492927094668117) internal successors, (2480), 1838 states have internal predecessors, (2480), 276 states have call successors, (276), 6 states have call predecessors, (276), 4 states have return successors, (274), 274 states have call predecessors, (274), 274 states have call successors, (274) [2021-05-02 23:08:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3030 transitions. [2021-05-02 23:08:14,100 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3030 transitions. Word has length 652 [2021-05-02 23:08:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:14,100 INFO L480 AbstractCegarLoop]: Abstraction has 2119 states and 3030 transitions. [2021-05-02 23:08:14,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:08:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3030 transitions. [2021-05-02 23:08:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2021-05-02 23:08:14,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:14,106 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:14,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:08:14,106 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash -987058539, now seen corresponding path program 90 times [2021-05-02 23:08:14,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:14,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245228870] [2021-05-02 23:08:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:14,112 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:14,114 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:18,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:18,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 644 [2021-05-02 23:08:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:18,343 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:18,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245228870] [2021-05-02 23:08:18,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [245228870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:18,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:18,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:08:18,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221122474] [2021-05-02 23:08:18,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:08:18,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:18,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:08:18,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=4745, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:08:18,346 INFO L87 Difference]: Start difference. First operand 2119 states and 3030 transitions. Second operand has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:08:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:25,237 INFO L93 Difference]: Finished difference Result 4104 states and 6043 transitions. [2021-05-02 23:08:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:08:25,238 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 659 [2021-05-02 23:08:25,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:25,243 INFO L225 Difference]: With dead ends: 4104 [2021-05-02 23:08:25,243 INFO L226 Difference]: Without dead ends: 2174 [2021-05-02 23:08:25,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4088.1ms TimeCoverageRelationStatistics Valid=4474, Invalid=5032, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:08:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-05-02 23:08:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2142. [2021-05-02 23:08:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 1858 states have (on average 1.3493003229278795) internal successors, (2507), 1858 states have internal predecessors, (2507), 279 states have call successors, (279), 6 states have call predecessors, (279), 4 states have return successors, (277), 277 states have call predecessors, (277), 277 states have call successors, (277) [2021-05-02 23:08:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 3063 transitions. [2021-05-02 23:08:25,652 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 3063 transitions. Word has length 659 [2021-05-02 23:08:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:25,652 INFO L480 AbstractCegarLoop]: Abstraction has 2142 states and 3063 transitions. [2021-05-02 23:08:25,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:08:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 3063 transitions. [2021-05-02 23:08:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 667 [2021-05-02 23:08:25,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:25,658 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:25,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:08:25,658 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:25,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:25,658 INFO L82 PathProgramCache]: Analyzing trace with hash 117492891, now seen corresponding path program 91 times [2021-05-02 23:08:25,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:25,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140995287] [2021-05-02 23:08:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:25,663 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:25,664 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:29,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:29,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 651 [2021-05-02 23:08:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:29,896 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:29,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140995287] [2021-05-02 23:08:29,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [140995287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:29,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:29,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:08:29,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784267860] [2021-05-02 23:08:29,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:08:29,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:29,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:08:29,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:08:29,898 INFO L87 Difference]: Start difference. First operand 2142 states and 3063 transitions. Second operand has 97 states, 97 states have (on average 2.11340206185567) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:08:38,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:38,772 INFO L93 Difference]: Finished difference Result 4148 states and 6108 transitions. [2021-05-02 23:08:38,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 23:08:38,772 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.11340206185567) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 666 [2021-05-02 23:08:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:38,776 INFO L225 Difference]: With dead ends: 4148 [2021-05-02 23:08:38,776 INFO L226 Difference]: Without dead ends: 2197 [2021-05-02 23:08:38,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4089.1ms TimeCoverageRelationStatistics Valid=4569, Invalid=5133, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:08:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-05-02 23:08:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2165. [2021-05-02 23:08:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 1878 states have (on average 1.349307774227902) internal successors, (2534), 1878 states have internal predecessors, (2534), 282 states have call successors, (282), 6 states have call predecessors, (282), 4 states have return successors, (280), 280 states have call predecessors, (280), 280 states have call successors, (280) [2021-05-02 23:08:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 3096 transitions. [2021-05-02 23:08:39,154 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 3096 transitions. Word has length 666 [2021-05-02 23:08:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:39,155 INFO L480 AbstractCegarLoop]: Abstraction has 2165 states and 3096 transitions. [2021-05-02 23:08:39,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.11340206185567) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:08:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 3096 transitions. [2021-05-02 23:08:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2021-05-02 23:08:39,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:39,161 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:39,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:08:39,161 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:39,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:39,162 INFO L82 PathProgramCache]: Analyzing trace with hash 817995217, now seen corresponding path program 92 times [2021-05-02 23:08:39,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:39,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607163090] [2021-05-02 23:08:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:39,167 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:39,169 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:43,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:43,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 658 [2021-05-02 23:08:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:43,353 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:43,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607163090] [2021-05-02 23:08:43,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607163090] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:43,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:43,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:08:43,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165496323] [2021-05-02 23:08:43,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:08:43,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:43,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:08:43,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=4942, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:08:43,355 INFO L87 Difference]: Start difference. First operand 2165 states and 3096 transitions. Second operand has 98 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:08:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:50,604 INFO L93 Difference]: Finished difference Result 4192 states and 6173 transitions. [2021-05-02 23:08:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 23:08:50,605 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 673 [2021-05-02 23:08:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:50,610 INFO L225 Difference]: With dead ends: 4192 [2021-05-02 23:08:50,610 INFO L226 Difference]: Without dead ends: 2220 [2021-05-02 23:08:50,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 4028.3ms TimeCoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:08:50,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-05-02 23:08:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2188. [2021-05-02 23:08:50,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 1898 states have (on average 1.3493150684931507) internal successors, (2561), 1898 states have internal predecessors, (2561), 285 states have call successors, (285), 6 states have call predecessors, (285), 4 states have return successors, (283), 283 states have call predecessors, (283), 283 states have call successors, (283) [2021-05-02 23:08:50,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 3129 transitions. [2021-05-02 23:08:50,984 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 3129 transitions. Word has length 673 [2021-05-02 23:08:50,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:50,984 INFO L480 AbstractCegarLoop]: Abstraction has 2188 states and 3129 transitions. [2021-05-02 23:08:50,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:08:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 3129 transitions. [2021-05-02 23:08:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2021-05-02 23:08:50,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:50,990 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:50,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:08:50,991 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash 448225119, now seen corresponding path program 93 times [2021-05-02 23:08:50,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:50,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847012172] [2021-05-02 23:08:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:50,996 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:50,997 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:55,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:55,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 665 [2021-05-02 23:08:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:55,359 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:55,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847012172] [2021-05-02 23:08:55,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1847012172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:55,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:55,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:08:55,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443044691] [2021-05-02 23:08:55,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:08:55,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:55,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:08:55,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4660, Invalid=5042, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:08:55,362 INFO L87 Difference]: Start difference. First operand 2188 states and 3129 transitions. Second operand has 99 states, 99 states have (on average 2.111111111111111) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:06,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:06,261 INFO L93 Difference]: Finished difference Result 4236 states and 6238 transitions. [2021-05-02 23:09:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 23:09:06,263 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.111111111111111) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 680 [2021-05-02 23:09:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:06,269 INFO L225 Difference]: With dead ends: 4236 [2021-05-02 23:09:06,269 INFO L226 Difference]: Without dead ends: 2243 [2021-05-02 23:09:06,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 4206.9ms TimeCoverageRelationStatistics Valid=4762, Invalid=5338, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:09:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2021-05-02 23:09:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 2211. [2021-05-02 23:09:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 1918 states have (on average 1.3493222106360792) internal successors, (2588), 1918 states have internal predecessors, (2588), 288 states have call successors, (288), 6 states have call predecessors, (288), 4 states have return successors, (286), 286 states have call predecessors, (286), 286 states have call successors, (286) [2021-05-02 23:09:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3162 transitions. [2021-05-02 23:09:06,735 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3162 transitions. Word has length 680 [2021-05-02 23:09:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:06,735 INFO L480 AbstractCegarLoop]: Abstraction has 2211 states and 3162 transitions. [2021-05-02 23:09:06,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.111111111111111) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3162 transitions. [2021-05-02 23:09:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2021-05-02 23:09:06,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:06,744 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:06,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:09:06,744 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash -470435571, now seen corresponding path program 94 times [2021-05-02 23:09:06,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:06,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471059256] [2021-05-02 23:09:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:06,755 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:06,757 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:11,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:11,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 672 [2021-05-02 23:09:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:09:11,752 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:11,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471059256] [2021-05-02 23:09:11,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [471059256] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:11,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:11,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:09:11,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412844927] [2021-05-02 23:09:11,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:09:11,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:11,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:09:11,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=5143, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:09:11,755 INFO L87 Difference]: Start difference. First operand 2211 states and 3162 transitions. Second operand has 100 states, 100 states have (on average 2.11) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:20,236 INFO L93 Difference]: Finished difference Result 4280 states and 6303 transitions. [2021-05-02 23:09:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 23:09:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.11) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 687 [2021-05-02 23:09:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:20,242 INFO L225 Difference]: With dead ends: 4280 [2021-05-02 23:09:20,242 INFO L226 Difference]: Without dead ends: 2266 [2021-05-02 23:09:20,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 4738.1ms TimeCoverageRelationStatistics Valid=4860, Invalid=5442, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:09:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-05-02 23:09:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2234. [2021-05-02 23:09:20,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 1938 states have (on average 1.349329205366357) internal successors, (2615), 1938 states have internal predecessors, (2615), 291 states have call successors, (291), 6 states have call predecessors, (291), 4 states have return successors, (289), 289 states have call predecessors, (289), 289 states have call successors, (289) [2021-05-02 23:09:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 3195 transitions. [2021-05-02 23:09:20,716 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 3195 transitions. Word has length 687 [2021-05-02 23:09:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:20,716 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 3195 transitions. [2021-05-02 23:09:20,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.11) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 3195 transitions. [2021-05-02 23:09:20,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2021-05-02 23:09:20,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:20,723 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:20,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:09:20,723 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:20,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:20,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1531995683, now seen corresponding path program 95 times [2021-05-02 23:09:20,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:20,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569074292] [2021-05-02 23:09:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:20,742 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:20,744 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:25,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:25,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 679 [2021-05-02 23:09:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:09:25,244 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:25,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569074292] [2021-05-02 23:09:25,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [569074292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:25,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:25,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-02 23:09:25,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211506829] [2021-05-02 23:09:25,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 23:09:25,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:25,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 23:09:25,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:09:25,246 INFO L87 Difference]: Start difference. First operand 2234 states and 3195 transitions. Second operand has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:36,287 INFO L93 Difference]: Finished difference Result 4324 states and 6368 transitions. [2021-05-02 23:09:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 23:09:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 694 [2021-05-02 23:09:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:36,293 INFO L225 Difference]: With dead ends: 4324 [2021-05-02 23:09:36,293 INFO L226 Difference]: Without dead ends: 2289 [2021-05-02 23:09:36,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 4208.3ms TimeCoverageRelationStatistics Valid=4959, Invalid=5547, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:09:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-05-02 23:09:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2257. [2021-05-02 23:09:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 1958 states have (on average 1.3493360572012258) internal successors, (2642), 1958 states have internal predecessors, (2642), 294 states have call successors, (294), 6 states have call predecessors, (294), 4 states have return successors, (292), 292 states have call predecessors, (292), 292 states have call successors, (292) [2021-05-02 23:09:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3228 transitions. [2021-05-02 23:09:36,758 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3228 transitions. Word has length 694 [2021-05-02 23:09:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:36,758 INFO L480 AbstractCegarLoop]: Abstraction has 2257 states and 3228 transitions. [2021-05-02 23:09:36,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3228 transitions. [2021-05-02 23:09:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2021-05-02 23:09:36,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:36,769 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:36,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:09:36,769 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash -911753143, now seen corresponding path program 96 times [2021-05-02 23:09:36,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:36,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870140588] [2021-05-02 23:09:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:36,778 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:36,779 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:41,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:41,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2021-05-02 23:09:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:09:41,738 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:41,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870140588] [2021-05-02 23:09:41,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [870140588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:41,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:41,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-02 23:09:41,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768670398] [2021-05-02 23:09:41,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 23:09:41,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:41,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 23:09:41,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=5348, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:09:41,741 INFO L87 Difference]: Start difference. First operand 2257 states and 3228 transitions. Second operand has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:51,718 INFO L93 Difference]: Finished difference Result 4368 states and 6433 transitions. [2021-05-02 23:09:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 23:09:51,719 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 701 [2021-05-02 23:09:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:51,723 INFO L225 Difference]: With dead ends: 4368 [2021-05-02 23:09:51,723 INFO L226 Difference]: Without dead ends: 2312 [2021-05-02 23:09:51,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 4688.8ms TimeCoverageRelationStatistics Valid=5059, Invalid=5653, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:09:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-05-02 23:09:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2280. [2021-05-02 23:09:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 1978 states have (on average 1.3493427704752274) internal successors, (2669), 1978 states have internal predecessors, (2669), 297 states have call successors, (297), 6 states have call predecessors, (297), 4 states have return successors, (295), 295 states have call predecessors, (295), 295 states have call successors, (295) [2021-05-02 23:09:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 3261 transitions. [2021-05-02 23:09:52,191 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 3261 transitions. Word has length 701 [2021-05-02 23:09:52,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:52,192 INFO L480 AbstractCegarLoop]: Abstraction has 2280 states and 3261 transitions. [2021-05-02 23:09:52,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 3261 transitions. [2021-05-02 23:09:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2021-05-02 23:09:52,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:52,198 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:52,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:09:52,198 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash -357883673, now seen corresponding path program 97 times [2021-05-02 23:09:52,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:52,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438423261] [2021-05-02 23:09:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:52,212 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:52,214 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:56,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:56,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 693 [2021-05-02 23:09:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:09:56,893 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:56,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438423261] [2021-05-02 23:09:56,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438423261] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:56,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:56,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-02 23:09:56,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035795931] [2021-05-02 23:09:56,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 23:09:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 23:09:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:09:56,896 INFO L87 Difference]: Start difference. First operand 2280 states and 3261 transitions. Second operand has 103 states, 103 states have (on average 2.1067961165048543) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:07,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:10:07,690 INFO L93 Difference]: Finished difference Result 4412 states and 6498 transitions. [2021-05-02 23:10:07,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 23:10:07,691 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1067961165048543) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 708 [2021-05-02 23:10:07,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:10:07,698 INFO L225 Difference]: With dead ends: 4412 [2021-05-02 23:10:07,698 INFO L226 Difference]: Without dead ends: 2335 [2021-05-02 23:10:07,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 4473.3ms TimeCoverageRelationStatistics Valid=5160, Invalid=5760, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:10:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-05-02 23:10:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 2303. [2021-05-02 23:10:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 1998 states have (on average 1.3493493493493494) internal successors, (2696), 1998 states have internal predecessors, (2696), 300 states have call successors, (300), 6 states have call predecessors, (300), 4 states have return successors, (298), 298 states have call predecessors, (298), 298 states have call successors, (298) [2021-05-02 23:10:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 3294 transitions. [2021-05-02 23:10:08,320 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 3294 transitions. Word has length 708 [2021-05-02 23:10:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:10:08,320 INFO L480 AbstractCegarLoop]: Abstraction has 2303 states and 3294 transitions. [2021-05-02 23:10:08,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.1067961165048543) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 3294 transitions. [2021-05-02 23:10:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2021-05-02 23:10:08,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:10:08,329 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:10:08,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:10:08,329 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:10:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:10:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1976011899, now seen corresponding path program 98 times [2021-05-02 23:10:08,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:10:08,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089365347] [2021-05-02 23:10:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:10:08,336 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:10:08,338 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:10:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:14,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:10:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:14,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2021-05-02 23:10:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:10:14,094 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:14,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089365347] [2021-05-02 23:10:14,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089365347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:14,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:14,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-02 23:10:14,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482319289] [2021-05-02 23:10:14,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 23:10:14,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:14,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 23:10:14,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=5557, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:10:14,098 INFO L87 Difference]: Start difference. First operand 2303 states and 3294 transitions. Second operand has 104 states, 104 states have (on average 2.105769230769231) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:10:26,861 INFO L93 Difference]: Finished difference Result 4456 states and 6563 transitions. [2021-05-02 23:10:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 23:10:26,862 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.105769230769231) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 715 [2021-05-02 23:10:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:10:26,867 INFO L225 Difference]: With dead ends: 4456 [2021-05-02 23:10:26,867 INFO L226 Difference]: Without dead ends: 2358 [2021-05-02 23:10:26,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 5533.1ms TimeCoverageRelationStatistics Valid=5262, Invalid=5868, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:10:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-05-02 23:10:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2326. [2021-05-02 23:10:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2018 states have (on average 1.3493557978196233) internal successors, (2723), 2018 states have internal predecessors, (2723), 303 states have call successors, (303), 6 states have call predecessors, (303), 4 states have return successors, (301), 301 states have call predecessors, (301), 301 states have call successors, (301) [2021-05-02 23:10:27,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3327 transitions. [2021-05-02 23:10:27,449 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3327 transitions. Word has length 715 [2021-05-02 23:10:27,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:10:27,449 INFO L480 AbstractCegarLoop]: Abstraction has 2326 states and 3327 transitions. [2021-05-02 23:10:27,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.105769230769231) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:27,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3327 transitions. [2021-05-02 23:10:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2021-05-02 23:10:27,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:10:27,457 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:10:27,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-02 23:10:27,457 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:10:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:10:27,457 INFO L82 PathProgramCache]: Analyzing trace with hash -14233685, now seen corresponding path program 99 times [2021-05-02 23:10:27,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:10:27,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422458328] [2021-05-02 23:10:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:10:27,464 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:10:27,466 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:10:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:32,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:10:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:32,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 707 [2021-05-02 23:10:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:10:32,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:32,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422458328] [2021-05-02 23:10:32,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [422458328] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:32,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:32,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-02 23:10:32,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102399537] [2021-05-02 23:10:32,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 23:10:32,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:32,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 23:10:32,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:10:32,675 INFO L87 Difference]: Start difference. First operand 2326 states and 3327 transitions. Second operand has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:10:43,202 INFO L93 Difference]: Finished difference Result 4500 states and 6628 transitions. [2021-05-02 23:10:43,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-02 23:10:43,203 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 722 [2021-05-02 23:10:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:10:43,208 INFO L225 Difference]: With dead ends: 4500 [2021-05-02 23:10:43,208 INFO L226 Difference]: Without dead ends: 2381 [2021-05-02 23:10:43,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 5013.9ms TimeCoverageRelationStatistics Valid=5365, Invalid=5977, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:10:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-05-02 23:10:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2349. [2021-05-02 23:10:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2038 states have (on average 1.3493621197252208) internal successors, (2750), 2038 states have internal predecessors, (2750), 306 states have call successors, (306), 6 states have call predecessors, (306), 4 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2021-05-02 23:10:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3360 transitions. [2021-05-02 23:10:43,816 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3360 transitions. Word has length 722 [2021-05-02 23:10:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:10:43,817 INFO L480 AbstractCegarLoop]: Abstraction has 2349 states and 3360 transitions. [2021-05-02 23:10:43,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3360 transitions. [2021-05-02 23:10:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2021-05-02 23:10:43,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:10:43,824 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:10:43,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:10:43,825 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:10:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:10:43,825 INFO L82 PathProgramCache]: Analyzing trace with hash -410479935, now seen corresponding path program 100 times [2021-05-02 23:10:43,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:10:43,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698912172] [2021-05-02 23:10:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:10:43,830 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:10:43,831 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:10:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:49,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:10:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:49,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 714 [2021-05-02 23:10:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:10:49,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:49,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698912172] [2021-05-02 23:10:49,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1698912172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:49,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:49,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-02 23:10:49,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893744529] [2021-05-02 23:10:49,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 23:10:49,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:49,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 23:10:49,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5360, Invalid=5770, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:10:49,236 INFO L87 Difference]: Start difference. First operand 2349 states and 3360 transitions. Second operand has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:11:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:11:00,673 INFO L93 Difference]: Finished difference Result 4544 states and 6693 transitions. [2021-05-02 23:11:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 23:11:00,673 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 729 [2021-05-02 23:11:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:11:00,680 INFO L225 Difference]: With dead ends: 4544 [2021-05-02 23:11:00,680 INFO L226 Difference]: Without dead ends: 2404 [2021-05-02 23:11:00,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5203.6ms TimeCoverageRelationStatistics Valid=5469, Invalid=6087, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:11:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-05-02 23:11:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2372. [2021-05-02 23:11:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2058 states have (on average 1.3493683187560739) internal successors, (2777), 2058 states have internal predecessors, (2777), 309 states have call successors, (309), 6 states have call predecessors, (309), 4 states have return successors, (307), 307 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 23:11:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3393 transitions. [2021-05-02 23:11:01,286 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3393 transitions. Word has length 729 [2021-05-02 23:11:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:11:01,286 INFO L480 AbstractCegarLoop]: Abstraction has 2372 states and 3393 transitions. [2021-05-02 23:11:01,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:11:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3393 transitions. [2021-05-02 23:11:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2021-05-02 23:11:01,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:11:01,293 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:11:01,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:11:01,293 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:11:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:11:01,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2019380625, now seen corresponding path program 101 times [2021-05-02 23:11:01,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:11:01,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760082715] [2021-05-02 23:11:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:11:01,299 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:01,301 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:11:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:06,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:11:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:06,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 721 [2021-05-02 23:11:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:11:06,807 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:11:06,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760082715] [2021-05-02 23:11:06,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760082715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:11:06,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:11:06,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-02 23:11:06,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825326805] [2021-05-02 23:11:06,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-02 23:11:06,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:11:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-02 23:11:06,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5464, Invalid=5878, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:11:06,809 INFO L87 Difference]: Start difference. First operand 2372 states and 3393 transitions. Second operand has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:11:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:11:20,831 INFO L93 Difference]: Finished difference Result 4588 states and 6758 transitions. [2021-05-02 23:11:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-02 23:11:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 736 [2021-05-02 23:11:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:11:20,839 INFO L225 Difference]: With dead ends: 4588 [2021-05-02 23:11:20,839 INFO L226 Difference]: Without dead ends: 2427 [2021-05-02 23:11:20,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5331.2ms TimeCoverageRelationStatistics Valid=5574, Invalid=6198, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:11:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-05-02 23:11:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2395. [2021-05-02 23:11:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2078 states have (on average 1.3493743984600577) internal successors, (2804), 2078 states have internal predecessors, (2804), 312 states have call successors, (312), 6 states have call predecessors, (312), 4 states have return successors, (310), 310 states have call predecessors, (310), 310 states have call successors, (310) [2021-05-02 23:11:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 3426 transitions. [2021-05-02 23:11:21,547 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 3426 transitions. Word has length 736 [2021-05-02 23:11:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:11:21,547 INFO L480 AbstractCegarLoop]: Abstraction has 2395 states and 3426 transitions. [2021-05-02 23:11:21,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:11:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 3426 transitions. [2021-05-02 23:11:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2021-05-02 23:11:21,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:11:21,554 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:11:21,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-02 23:11:21,555 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:11:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:11:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash 418962941, now seen corresponding path program 102 times [2021-05-02 23:11:21,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:11:21,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397893863] [2021-05-02 23:11:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:11:21,561 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:21,563 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:11:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:30,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:11:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:30,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 728 [2021-05-02 23:11:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:11:30,312 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:11:30,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397893863] [2021-05-02 23:11:30,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [397893863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:11:30,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:11:30,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-02 23:11:30,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828454557] [2021-05-02 23:11:30,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 23:11:30,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:11:30,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 23:11:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5569, Invalid=5987, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:11:30,316 INFO L87 Difference]: Start difference. First operand 2395 states and 3426 transitions. Second operand has 108 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:11:42,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:11:42,534 INFO L93 Difference]: Finished difference Result 4632 states and 6823 transitions. [2021-05-02 23:11:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 23:11:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 743 [2021-05-02 23:11:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:11:42,539 INFO L225 Difference]: With dead ends: 4632 [2021-05-02 23:11:42,539 INFO L226 Difference]: Without dead ends: 2450 [2021-05-02 23:11:42,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 8528.1ms TimeCoverageRelationStatistics Valid=5680, Invalid=6310, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:11:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-05-02 23:11:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2418. [2021-05-02 23:11:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2098 states have (on average 1.3493803622497618) internal successors, (2831), 2098 states have internal predecessors, (2831), 315 states have call successors, (315), 6 states have call predecessors, (315), 4 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2021-05-02 23:11:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3459 transitions. [2021-05-02 23:11:43,195 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3459 transitions. Word has length 743 [2021-05-02 23:11:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:11:43,195 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 3459 transitions. [2021-05-02 23:11:43,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:11:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3459 transitions. [2021-05-02 23:11:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2021-05-02 23:11:43,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:11:43,206 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:11:43,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:11:43,206 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:11:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:11:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash -813823693, now seen corresponding path program 103 times [2021-05-02 23:11:43,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:11:43,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811963780] [2021-05-02 23:11:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:11:43,214 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:43,215 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:11:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:48,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:11:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:48,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 735 [2021-05-02 23:11:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:11:48,481 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:11:48,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811963780] [2021-05-02 23:11:48,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811963780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:11:48,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:11:48,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-02 23:11:48,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697168889] [2021-05-02 23:11:48,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-02 23:11:48,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:11:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-02 23:11:48,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5675, Invalid=6097, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:11:48,485 INFO L87 Difference]: Start difference. First operand 2418 states and 3459 transitions. Second operand has 109 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:11:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:11:59,259 INFO L93 Difference]: Finished difference Result 4676 states and 6888 transitions. [2021-05-02 23:11:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 23:11:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 750 [2021-05-02 23:11:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:11:59,268 INFO L225 Difference]: With dead ends: 4676 [2021-05-02 23:11:59,269 INFO L226 Difference]: Without dead ends: 2473 [2021-05-02 23:11:59,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 5036.4ms TimeCoverageRelationStatistics Valid=5787, Invalid=6423, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:11:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-05-02 23:12:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2441. [2021-05-02 23:12:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2118 states have (on average 1.3493862134088763) internal successors, (2858), 2118 states have internal predecessors, (2858), 318 states have call successors, (318), 6 states have call predecessors, (318), 4 states have return successors, (316), 316 states have call predecessors, (316), 316 states have call successors, (316) [2021-05-02 23:12:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 3492 transitions. [2021-05-02 23:12:00,046 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 3492 transitions. Word has length 750 [2021-05-02 23:12:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:12:00,046 INFO L480 AbstractCegarLoop]: Abstraction has 2441 states and 3492 transitions. [2021-05-02 23:12:00,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:12:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 3492 transitions. [2021-05-02 23:12:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2021-05-02 23:12:00,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:12:00,065 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:12:00,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:12:00,065 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:12:00,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:12:00,066 INFO L82 PathProgramCache]: Analyzing trace with hash 661263673, now seen corresponding path program 104 times [2021-05-02 23:12:00,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:12:00,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428835510] [2021-05-02 23:12:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:12:00,075 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:12:00,077 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:12:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:07,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:12:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:07,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 742 [2021-05-02 23:12:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:12:07,638 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:12:07,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428835510] [2021-05-02 23:12:07,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1428835510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:12:07,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:12:07,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-02 23:12:07,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342930812] [2021-05-02 23:12:07,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 23:12:07,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:12:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 23:12:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5782, Invalid=6208, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:12:07,641 INFO L87 Difference]: Start difference. First operand 2441 states and 3492 transitions. Second operand has 110 states, 110 states have (on average 2.1) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:12:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:12:19,562 INFO L93 Difference]: Finished difference Result 4720 states and 6953 transitions. [2021-05-02 23:12:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 23:12:19,563 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.1) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 757 [2021-05-02 23:12:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:12:19,568 INFO L225 Difference]: With dead ends: 4720 [2021-05-02 23:12:19,568 INFO L226 Difference]: Without dead ends: 2496 [2021-05-02 23:12:19,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 7259.8ms TimeCoverageRelationStatistics Valid=5895, Invalid=6537, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:12:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-05-02 23:12:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2464. [2021-05-02 23:12:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2138 states have (on average 1.3493919550982227) internal successors, (2885), 2138 states have internal predecessors, (2885), 321 states have call successors, (321), 6 states have call predecessors, (321), 4 states have return successors, (319), 319 states have call predecessors, (319), 319 states have call successors, (319) [2021-05-02 23:12:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 3525 transitions. [2021-05-02 23:12:20,099 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 3525 transitions. Word has length 757 [2021-05-02 23:12:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:12:20,100 INFO L480 AbstractCegarLoop]: Abstraction has 2464 states and 3525 transitions. [2021-05-02 23:12:20,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.1) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:12:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 3525 transitions. [2021-05-02 23:12:20,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2021-05-02 23:12:20,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:12:20,107 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:12:20,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:12:20,107 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:12:20,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:12:20,108 INFO L82 PathProgramCache]: Analyzing trace with hash 580391927, now seen corresponding path program 105 times [2021-05-02 23:12:20,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:12:20,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143716893] [2021-05-02 23:12:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:12:20,113 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:12:20,115 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:12:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:29,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:12:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:29,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 749 [2021-05-02 23:12:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:12:29,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:12:29,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143716893] [2021-05-02 23:12:29,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2143716893] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:12:29,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:12:29,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-02 23:12:29,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486420029] [2021-05-02 23:12:29,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 23:12:29,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:12:29,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 23:12:29,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5890, Invalid=6320, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:12:29,270 INFO L87 Difference]: Start difference. First operand 2464 states and 3525 transitions. Second operand has 111 states, 111 states have (on average 2.099099099099099) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:12:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:12:42,021 INFO L93 Difference]: Finished difference Result 4764 states and 7018 transitions. [2021-05-02 23:12:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-02 23:12:42,022 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.099099099099099) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 764 [2021-05-02 23:12:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:12:42,028 INFO L225 Difference]: With dead ends: 4764 [2021-05-02 23:12:42,028 INFO L226 Difference]: Without dead ends: 2519 [2021-05-02 23:12:42,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 8903.3ms TimeCoverageRelationStatistics Valid=6004, Invalid=6652, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:12:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-05-02 23:12:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2487. [2021-05-02 23:12:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2158 states have (on average 1.3493975903614457) internal successors, (2912), 2158 states have internal predecessors, (2912), 324 states have call successors, (324), 6 states have call predecessors, (324), 4 states have return successors, (322), 322 states have call predecessors, (322), 322 states have call successors, (322) [2021-05-02 23:12:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3558 transitions. [2021-05-02 23:12:42,767 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3558 transitions. Word has length 764 [2021-05-02 23:12:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:12:42,767 INFO L480 AbstractCegarLoop]: Abstraction has 2487 states and 3558 transitions. [2021-05-02 23:12:42,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.099099099099099) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:12:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3558 transitions. [2021-05-02 23:12:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2021-05-02 23:12:42,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:12:42,775 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:12:42,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:12:42,776 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:12:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:12:42,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1228732533, now seen corresponding path program 106 times [2021-05-02 23:12:42,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:12:42,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503138990] [2021-05-02 23:12:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:12:42,781 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:12:42,783 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:12:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:51,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:12:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:51,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-05-02 23:12:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:12:51,172 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:12:51,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503138990] [2021-05-02 23:12:51,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503138990] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:12:51,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:12:51,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-02 23:12:51,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85177172] [2021-05-02 23:12:51,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 23:12:51,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:12:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 23:12:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5999, Invalid=6433, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:12:51,174 INFO L87 Difference]: Start difference. First operand 2487 states and 3558 transitions. Second operand has 112 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:13:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:13:06,606 INFO L93 Difference]: Finished difference Result 4808 states and 7083 transitions. [2021-05-02 23:13:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 23:13:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 771 [2021-05-02 23:13:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:13:06,613 INFO L225 Difference]: With dead ends: 4808 [2021-05-02 23:13:06,613 INFO L226 Difference]: Without dead ends: 2542 [2021-05-02 23:13:06,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 8124.8ms TimeCoverageRelationStatistics Valid=6114, Invalid=6768, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:13:06,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-05-02 23:13:07,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2510. [2021-05-02 23:13:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2178 states have (on average 1.3494031221303948) internal successors, (2939), 2178 states have internal predecessors, (2939), 327 states have call successors, (327), 6 states have call predecessors, (327), 4 states have return successors, (325), 325 states have call predecessors, (325), 325 states have call successors, (325) [2021-05-02 23:13:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 3591 transitions. [2021-05-02 23:13:07,371 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 3591 transitions. Word has length 771 [2021-05-02 23:13:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:13:07,371 INFO L480 AbstractCegarLoop]: Abstraction has 2510 states and 3591 transitions. [2021-05-02 23:13:07,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:13:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 3591 transitions. [2021-05-02 23:13:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2021-05-02 23:13:07,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:13:07,381 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:13:07,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:13:07,381 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:13:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:13:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1901073083, now seen corresponding path program 107 times [2021-05-02 23:13:07,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:13:07,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018392793] [2021-05-02 23:13:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:13:07,388 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:07,391 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:13:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:15,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:13:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:15,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 763 [2021-05-02 23:13:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:13:15,399 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:13:15,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018392793] [2021-05-02 23:13:15,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1018392793] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:13:15,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:13:15,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-02 23:13:15,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943787326] [2021-05-02 23:13:15,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-02 23:13:15,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:13:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-02 23:13:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6109, Invalid=6547, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:13:15,402 INFO L87 Difference]: Start difference. First operand 2510 states and 3591 transitions. Second operand has 113 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:13:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:13:35,903 INFO L93 Difference]: Finished difference Result 4852 states and 7148 transitions. [2021-05-02 23:13:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-02 23:13:35,904 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 778 [2021-05-02 23:13:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:13:35,911 INFO L225 Difference]: With dead ends: 4852 [2021-05-02 23:13:35,911 INFO L226 Difference]: Without dead ends: 2565 [2021-05-02 23:13:35,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 7755.9ms TimeCoverageRelationStatistics Valid=6225, Invalid=6885, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:13:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-05-02 23:13:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2533. [2021-05-02 23:13:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2533 states, 2198 states have (on average 1.3494085532302094) internal successors, (2966), 2198 states have internal predecessors, (2966), 330 states have call successors, (330), 6 states have call predecessors, (330), 4 states have return successors, (328), 328 states have call predecessors, (328), 328 states have call successors, (328) [2021-05-02 23:13:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 3624 transitions. [2021-05-02 23:13:36,594 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 3624 transitions. Word has length 778 [2021-05-02 23:13:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:13:36,594 INFO L480 AbstractCegarLoop]: Abstraction has 2533 states and 3624 transitions. [2021-05-02 23:13:36,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:13:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 3624 transitions. [2021-05-02 23:13:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-05-02 23:13:36,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:13:36,603 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:13:36,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-02 23:13:36,603 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:13:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:13:36,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1045579697, now seen corresponding path program 108 times [2021-05-02 23:13:36,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:13:36,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188453493] [2021-05-02 23:13:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:13:36,612 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:36,614 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:13:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:42,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:13:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:42,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 770 [2021-05-02 23:13:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:13:42,521 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:13:42,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188453493] [2021-05-02 23:13:42,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1188453493] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:13:42,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:13:42,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-02 23:13:42,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891379643] [2021-05-02 23:13:42,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 23:13:42,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:13:42,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 23:13:42,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6220, Invalid=6662, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:13:42,526 INFO L87 Difference]: Start difference. First operand 2533 states and 3624 transitions. Second operand has 114 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:13:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:13:56,885 INFO L93 Difference]: Finished difference Result 4896 states and 7213 transitions. [2021-05-02 23:13:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 23:13:56,886 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 785 [2021-05-02 23:13:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:13:56,892 INFO L225 Difference]: With dead ends: 4896 [2021-05-02 23:13:56,892 INFO L226 Difference]: Without dead ends: 2588 [2021-05-02 23:13:56,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 5651.7ms TimeCoverageRelationStatistics Valid=6337, Invalid=7003, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:13:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-05-02 23:13:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2556. [2021-05-02 23:13:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2218 states have (on average 1.3494138863841298) internal successors, (2993), 2218 states have internal predecessors, (2993), 333 states have call successors, (333), 6 states have call predecessors, (333), 4 states have return successors, (331), 331 states have call predecessors, (331), 331 states have call successors, (331) [2021-05-02 23:13:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 3657 transitions. [2021-05-02 23:13:57,575 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 3657 transitions. Word has length 785 [2021-05-02 23:13:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:13:57,575 INFO L480 AbstractCegarLoop]: Abstraction has 2556 states and 3657 transitions. [2021-05-02 23:13:57,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:13:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 3657 transitions. [2021-05-02 23:13:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2021-05-02 23:13:57,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:13:57,584 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:13:57,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:13:57,585 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:13:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:13:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash -192592513, now seen corresponding path program 109 times [2021-05-02 23:13:57,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:13:57,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975496138] [2021-05-02 23:13:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:13:57,607 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:57,611 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:13:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:03,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:14:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:03,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 777 [2021-05-02 23:14:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:14:04,001 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:14:04,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975496138] [2021-05-02 23:14:04,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975496138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:14:04,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:14:04,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-02 23:14:04,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126358238] [2021-05-02 23:14:04,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-02 23:14:04,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:14:04,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-02 23:14:04,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6332, Invalid=6778, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:14:04,005 INFO L87 Difference]: Start difference. First operand 2556 states and 3657 transitions. Second operand has 115 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:14:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:14:20,860 INFO L93 Difference]: Finished difference Result 4940 states and 7278 transitions. [2021-05-02 23:14:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-02 23:14:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 792 [2021-05-02 23:14:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:14:20,867 INFO L225 Difference]: With dead ends: 4940 [2021-05-02 23:14:20,867 INFO L226 Difference]: Without dead ends: 2611 [2021-05-02 23:14:20,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 6132.5ms TimeCoverageRelationStatistics Valid=6450, Invalid=7122, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:14:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-05-02 23:14:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2579. [2021-05-02 23:14:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2238 states have (on average 1.3494191242180518) internal successors, (3020), 2238 states have internal predecessors, (3020), 336 states have call successors, (336), 6 states have call predecessors, (336), 4 states have return successors, (334), 334 states have call predecessors, (334), 334 states have call successors, (334) [2021-05-02 23:14:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 3690 transitions. [2021-05-02 23:14:21,580 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 3690 transitions. Word has length 792 [2021-05-02 23:14:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:14:21,580 INFO L480 AbstractCegarLoop]: Abstraction has 2579 states and 3690 transitions. [2021-05-02 23:14:21,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:14:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 3690 transitions. [2021-05-02 23:14:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2021-05-02 23:14:21,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:14:21,588 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:14:21,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:14:21,589 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:14:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:14:21,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1408580883, now seen corresponding path program 110 times [2021-05-02 23:14:21,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:14:21,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122366048] [2021-05-02 23:14:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:14:21,594 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:21,596 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:14:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:28,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:14:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:28,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 784 [2021-05-02 23:14:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:14:28,132 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:14:28,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122366048] [2021-05-02 23:14:28,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [122366048] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:14:28,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:14:28,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-02 23:14:28,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130823610] [2021-05-02 23:14:28,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 23:14:28,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:14:28,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 23:14:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6445, Invalid=6895, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:14:28,149 INFO L87 Difference]: Start difference. First operand 2579 states and 3690 transitions. Second operand has 116 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:14:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:14:42,137 INFO L93 Difference]: Finished difference Result 4984 states and 7343 transitions. [2021-05-02 23:14:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 23:14:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 799 [2021-05-02 23:14:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:14:42,144 INFO L225 Difference]: With dead ends: 4984 [2021-05-02 23:14:42,145 INFO L226 Difference]: Without dead ends: 2634 [2021-05-02 23:14:42,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 6324.6ms TimeCoverageRelationStatistics Valid=6564, Invalid=7242, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:14:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-05-02 23:14:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2602. [2021-05-02 23:14:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2258 states have (on average 1.3494242692648362) internal successors, (3047), 2258 states have internal predecessors, (3047), 339 states have call successors, (339), 6 states have call predecessors, (339), 4 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-05-02 23:14:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 3723 transitions. [2021-05-02 23:14:42,847 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 3723 transitions. Word has length 799 [2021-05-02 23:14:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:14:42,847 INFO L480 AbstractCegarLoop]: Abstraction has 2602 states and 3723 transitions. [2021-05-02 23:14:42,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:14:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 3723 transitions. [2021-05-02 23:14:42,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2021-05-02 23:14:42,855 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:14:42,856 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:14:42,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-02 23:14:42,856 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:14:42,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:14:42,856 INFO L82 PathProgramCache]: Analyzing trace with hash -778638269, now seen corresponding path program 111 times [2021-05-02 23:14:42,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:14:42,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330856215] [2021-05-02 23:14:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:14:42,862 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:42,864 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:14:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:49,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:14:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:49,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 791 [2021-05-02 23:14:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:14:49,487 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:14:49,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330856215] [2021-05-02 23:14:49,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330856215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:14:49,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:14:49,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-02 23:14:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058327698] [2021-05-02 23:14:49,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-02 23:14:49,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:14:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-02 23:14:49,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6559, Invalid=7013, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:14:49,491 INFO L87 Difference]: Start difference. First operand 2602 states and 3723 transitions. Second operand has 117 states, 117 states have (on average 2.094017094017094) internal successors, (245), 115 states have internal predecessors, (245), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:15:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:07,995 INFO L93 Difference]: Finished difference Result 5028 states and 7408 transitions. [2021-05-02 23:15:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-02 23:15:07,996 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.094017094017094) internal successors, (245), 115 states have internal predecessors, (245), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 806 [2021-05-02 23:15:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:08,008 INFO L225 Difference]: With dead ends: 5028 [2021-05-02 23:15:08,008 INFO L226 Difference]: Without dead ends: 2657 [2021-05-02 23:15:08,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 6361.1ms TimeCoverageRelationStatistics Valid=6679, Invalid=7363, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:15:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-05-02 23:15:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2625. [2021-05-02 23:15:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2278 states have (on average 1.3494293239683934) internal successors, (3074), 2278 states have internal predecessors, (3074), 342 states have call successors, (342), 6 states have call predecessors, (342), 4 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2021-05-02 23:15:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3756 transitions. [2021-05-02 23:15:08,929 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3756 transitions. Word has length 806 [2021-05-02 23:15:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:08,930 INFO L480 AbstractCegarLoop]: Abstraction has 2625 states and 3756 transitions. [2021-05-02 23:15:08,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.094017094017094) internal successors, (245), 115 states have internal predecessors, (245), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:15:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3756 transitions. [2021-05-02 23:15:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2021-05-02 23:15:08,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:08,939 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:08,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-02 23:15:08,940 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2034706985, now seen corresponding path program 112 times [2021-05-02 23:15:08,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:08,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039647262] [2021-05-02 23:15:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:08,955 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:08,957 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:16,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 798 [2021-05-02 23:15:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:16,580 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:16,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039647262] [2021-05-02 23:15:16,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2039647262] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:16,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:16,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-02 23:15:16,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886052177] [2021-05-02 23:15:16,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 23:15:16,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:16,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 23:15:16,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6674, Invalid=7132, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:15:16,583 INFO L87 Difference]: Start difference. First operand 2625 states and 3756 transitions. Second operand has 118 states, 118 states have (on average 2.093220338983051) internal successors, (247), 116 states have internal predecessors, (247), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:15:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:32,377 INFO L93 Difference]: Finished difference Result 5072 states and 7473 transitions. [2021-05-02 23:15:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 23:15:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.093220338983051) internal successors, (247), 116 states have internal predecessors, (247), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 813 [2021-05-02 23:15:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:32,384 INFO L225 Difference]: With dead ends: 5072 [2021-05-02 23:15:32,385 INFO L226 Difference]: Without dead ends: 2680 [2021-05-02 23:15:32,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 7330.1ms TimeCoverageRelationStatistics Valid=6795, Invalid=7485, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:15:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-05-02 23:15:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2648. [2021-05-02 23:15:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2298 states have (on average 1.3494342906875545) internal successors, (3101), 2298 states have internal predecessors, (3101), 345 states have call successors, (345), 6 states have call predecessors, (345), 4 states have return successors, (343), 343 states have call predecessors, (343), 343 states have call successors, (343) [2021-05-02 23:15:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 3789 transitions. [2021-05-02 23:15:33,241 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 3789 transitions. Word has length 813 [2021-05-02 23:15:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:33,242 INFO L480 AbstractCegarLoop]: Abstraction has 2648 states and 3789 transitions. [2021-05-02 23:15:33,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.093220338983051) internal successors, (247), 116 states have internal predecessors, (247), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:15:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 3789 transitions. [2021-05-02 23:15:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2021-05-02 23:15:33,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:33,252 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:33,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-02 23:15:33,252 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1100724473, now seen corresponding path program 113 times [2021-05-02 23:15:33,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:33,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803128357] [2021-05-02 23:15:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:33,271 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:33,272 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:40,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:40,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 805 [2021-05-02 23:15:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:40,789 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:40,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803128357] [2021-05-02 23:15:40,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803128357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:40,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:40,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-02 23:15:40,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686220705] [2021-05-02 23:15:40,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-02 23:15:40,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:40,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-02 23:15:40,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6790, Invalid=7252, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:15:40,792 INFO L87 Difference]: Start difference. First operand 2648 states and 3789 transitions. Second operand has 119 states, 119 states have (on average 2.092436974789916) internal successors, (249), 117 states have internal predecessors, (249), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:15:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:59,876 INFO L93 Difference]: Finished difference Result 5116 states and 7538 transitions. [2021-05-02 23:15:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 23:15:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.092436974789916) internal successors, (249), 117 states have internal predecessors, (249), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 820 [2021-05-02 23:15:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:59,883 INFO L225 Difference]: With dead ends: 5116 [2021-05-02 23:15:59,883 INFO L226 Difference]: Without dead ends: 2703 [2021-05-02 23:15:59,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 7277.3ms TimeCoverageRelationStatistics Valid=6912, Invalid=7608, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:15:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-05-02 23:16:00,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2671. [2021-05-02 23:16:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2318 states have (on average 1.3494391716997411) internal successors, (3128), 2318 states have internal predecessors, (3128), 348 states have call successors, (348), 6 states have call predecessors, (348), 4 states have return successors, (346), 346 states have call predecessors, (346), 346 states have call successors, (346) [2021-05-02 23:16:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3822 transitions. [2021-05-02 23:16:00,548 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3822 transitions. Word has length 820 [2021-05-02 23:16:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:00,548 INFO L480 AbstractCegarLoop]: Abstraction has 2671 states and 3822 transitions. [2021-05-02 23:16:00,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.092436974789916) internal successors, (249), 117 states have internal predecessors, (249), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:16:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3822 transitions. [2021-05-02 23:16:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2021-05-02 23:16:00,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:00,556 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:00,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-02 23:16:00,557 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash 711474533, now seen corresponding path program 114 times [2021-05-02 23:16:00,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:00,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157766203] [2021-05-02 23:16:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:00,563 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:00,564 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 812 [2021-05-02 23:16:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:08,787 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:08,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157766203] [2021-05-02 23:16:08,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157766203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:08,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:08,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-02 23:16:08,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475680663] [2021-05-02 23:16:08,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 23:16:08,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:08,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 23:16:08,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6907, Invalid=7373, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:16:08,789 INFO L87 Difference]: Start difference. First operand 2671 states and 3822 transitions. Second operand has 120 states, 120 states have (on average 2.091666666666667) internal successors, (251), 118 states have internal predecessors, (251), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)