/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/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:01:10,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:01:10,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:01:10,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 17:01:10,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 17:01:10,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 17:01:10,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 17:01:10,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 17:01:10,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 17:01:10,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 17:01:10,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 17:01:10,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 17:01:10,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:01:10,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:01:10,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:01:10,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:01:10,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:01:10,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:01:10,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:01:10,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:01:10,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:01:10,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:01:10,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:01:10,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:01:10,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 17:01:10,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 17:01:10,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 17:01:10,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 17:01:10,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 17:01:10,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 17:01:10,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 17:01:10,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 17:01:10,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 17:01:10,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 17:01:10,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 17:01:10,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 17:01:10,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 17:01:10,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 17:01:10,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:01:10,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:01:10,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:01:10,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:01:10,173 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:01:10,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:01:10,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:01:10,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:01:10,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:01:10,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:01:10,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:01:10,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:01:10,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:01:10,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:01:10,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:01:10,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:01:10,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:01:10,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:01:10,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:01:10,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:01:10,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:01:10,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:01:10,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:10,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:01:10,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:01:10,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:01:10,177 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:01:10,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:01:10,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:01:10,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:01:10,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:01:10,405 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:01:10,405 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:01:10,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2022-01-31 17:01:10,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beef51c9a/1ad429c601c5458481a47c7007701c72/FLAGfe9b965ff [2022-01-31 17:01:10,879 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:01:10,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i [2022-01-31 17:01:10,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beef51c9a/1ad429c601c5458481a47c7007701c72/FLAGfe9b965ff [2022-01-31 17:01:10,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beef51c9a/1ad429c601c5458481a47c7007701c72 [2022-01-31 17:01:10,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:01:10,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:01:10,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:10,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:01:10,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:01:10,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:10" (1/1) ... [2022-01-31 17:01:10,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a24c278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:10, skipping insertion in model container [2022-01-31 17:01:10,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:10" (1/1) ... [2022-01-31 17:01:10,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:01:10,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:01:11,158 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i[980,993] [2022-01-31 17:01:11,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:11,280 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:01:11,290 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i[980,993] [2022-01-31 17:01:11,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:11,334 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:01:11,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11 WrapperNode [2022-01-31 17:01:11,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:11,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:01:11,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:01:11,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:01:11,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:01:11,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:01:11,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:01:11,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:01:11,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:11,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:01:11,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:01:11,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:01:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:01:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:01:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 17:01:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:01:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:01:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2022-01-31 17:01:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2022-01-31 17:01:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2022-01-31 17:01:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2022-01-31 17:01:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2022-01-31 17:01:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure select [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure random [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2022-01-31 17:01:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2022-01-31 17:01:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2022-01-31 17:01:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2022-01-31 17:01:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2022-01-31 17:01:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure system [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure div [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2022-01-31 17:01:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2022-01-31 17:01:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:01:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:01:11,647 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:01:11,649 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:01:11,861 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:01:11,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:01:11,867 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 17:01:11,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:11 BoogieIcfgContainer [2022-01-31 17:01:11,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:01:11,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:01:11,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:01:11,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:01:11,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:01:10" (1/3) ... [2022-01-31 17:01:11,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5757ca19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:11, skipping insertion in model container [2022-01-31 17:01:11,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (2/3) ... [2022-01-31 17:01:11,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5757ca19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:11, skipping insertion in model container [2022-01-31 17:01:11,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:11" (3/3) ... [2022-01-31 17:01:11,882 INFO L111 eAbstractionObserver]: Analyzing ICFG relax-2.i [2022-01-31 17:01:11,887 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:01:11,887 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:01:11,922 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:01:11,927 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:01:11,928 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:01:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 17:01:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:01:11,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:11,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:11,950 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash -852113428, now seen corresponding path program 1 times [2022-01-31 17:01:11,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:11,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125092499] [2022-01-31 17:01:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:11,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 17:01:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125092499] [2022-01-31 17:01:12,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125092499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:12,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26591244] [2022-01-31 17:01:12,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:12,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:12,262 INFO L87 Difference]: Start difference. First operand has 58 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,471 INFO L93 Difference]: Finished difference Result 111 states and 168 transitions. [2022-01-31 17:01:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-31 17:01:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,479 INFO L225 Difference]: With dead ends: 111 [2022-01-31 17:01:12,479 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 17:01:12,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:12,486 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 59 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 85 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:12,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 17:01:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 17:01:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.380952380952381) internal successors, (58), 43 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 17:01:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2022-01-31 17:01:12,525 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 19 [2022-01-31 17:01:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,526 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2022-01-31 17:01:12,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2022-01-31 17:01:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 17:01:12,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:01:12,529 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,530 INFO L85 PathProgramCache]: Analyzing trace with hash -231440874, now seen corresponding path program 1 times [2022-01-31 17:01:12,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649229177] [2022-01-31 17:01:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 17:01:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649229177] [2022-01-31 17:01:12,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [649229177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:01:12,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395509502] [2022-01-31 17:01:12,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:01:12,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:01:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:12,667 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,968 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2022-01-31 17:01:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:01:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 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 21 [2022-01-31 17:01:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,972 INFO L225 Difference]: With dead ends: 104 [2022-01-31 17:01:12,973 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 17:01:12,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:12,977 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 78 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 17:01:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-01-31 17:01:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.36) internal successors, (68), 51 states have internal predecessors, (68), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 17:01:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2022-01-31 17:01:12,992 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 21 [2022-01-31 17:01:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,992 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2022-01-31 17:01:12,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2022-01-31 17:01:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 17:01:12,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:01:12,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,994 INFO L85 PathProgramCache]: Analyzing trace with hash -471785876, now seen corresponding path program 1 times [2022-01-31 17:01:12,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793404330] [2022-01-31 17:01:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 17:01:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,141 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793404330] [2022-01-31 17:01:13,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [793404330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:01:13,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190484642] [2022-01-31 17:01:13,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:01:13,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:01:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:13,149 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,418 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2022-01-31 17:01:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:01:13,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 17:01:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,420 INFO L225 Difference]: With dead ends: 82 [2022-01-31 17:01:13,420 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 17:01:13,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:13,421 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 75 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 17:01:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-01-31 17:01:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 55 states have internal predecessors, (73), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 17:01:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-01-31 17:01:13,432 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 22 [2022-01-31 17:01:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,433 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-01-31 17:01:13,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-01-31 17:01:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 17:01:13,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:01:13,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1324419852, now seen corresponding path program 1 times [2022-01-31 17:01:13,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086638904] [2022-01-31 17:01:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,445 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,445 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,448 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 17:01:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,617 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086638904] [2022-01-31 17:01:13,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086638904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:13,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586167750] [2022-01-31 17:01:13,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:13,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:13,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:13,619 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,253 INFO L93 Difference]: Finished difference Result 152 states and 214 transitions. [2022-01-31 17:01:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:01:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 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 23 [2022-01-31 17:01:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,255 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:01:14,255 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 17:01:14,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:01:14,256 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 402 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 79 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 17:01:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 80. [2022-01-31 17:01:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 64 states have internal predecessors, (84), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-01-31 17:01:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2022-01-31 17:01:14,298 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 23 [2022-01-31 17:01:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,299 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2022-01-31 17:01:14,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2022-01-31 17:01:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 17:01:14,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:01:14,300 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 150061058, now seen corresponding path program 1 times [2022-01-31 17:01:14,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625400591] [2022-01-31 17:01:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 17:01:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625400591] [2022-01-31 17:01:14,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [625400591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:14,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961721960] [2022-01-31 17:01:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:14,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:14,377 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,505 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2022-01-31 17:01:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:14,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 17:01:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,507 INFO L225 Difference]: With dead ends: 92 [2022-01-31 17:01:14,507 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:01:14,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:14,510 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 53 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 77 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:01:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-01-31 17:01:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 53 states have internal predecessors, (68), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 17:01:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2022-01-31 17:01:14,561 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 24 [2022-01-31 17:01:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,561 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2022-01-31 17:01:14,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2022-01-31 17:01:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 17:01:14,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:01:14,562 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,562 INFO L85 PathProgramCache]: Analyzing trace with hash 3757132, now seen corresponding path program 1 times [2022-01-31 17:01:14,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898169784] [2022-01-31 17:01:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,564 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 17:01:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898169784] [2022-01-31 17:01:14,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [898169784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:01:14,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453984238] [2022-01-31 17:01:14,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:01:14,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:01:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:14,695 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,236 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-01-31 17:01:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-01-31 17:01:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,237 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:01:15,237 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 17:01:15,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:15,238 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 201 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 84 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 17:01:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 68. [2022-01-31 17:01:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 53 states have internal predecessors, (67), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 17:01:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-01-31 17:01:15,259 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 24 [2022-01-31 17:01:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,259 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-01-31 17:01:15,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-01-31 17:01:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:01:15,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:01:15,260 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2021354514, now seen corresponding path program 1 times [2022-01-31 17:01:15,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565980136] [2022-01-31 17:01:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:01:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:15,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565980136] [2022-01-31 17:01:15,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [565980136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:01:15,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784442511] [2022-01-31 17:01:15,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:01:15,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:01:15,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:15,472 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,248 INFO L93 Difference]: Finished difference Result 169 states and 240 transitions. [2022-01-31 17:01:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:01:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-01-31 17:01:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,249 INFO L225 Difference]: With dead ends: 169 [2022-01-31 17:01:16,249 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 17:01:16,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:16,250 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 223 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 118 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:01:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 17:01:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 78. [2022-01-31 17:01:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 63 states have internal predecessors, (78), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (16), 8 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-31 17:01:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 105 transitions. [2022-01-31 17:01:16,278 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 105 transitions. Word has length 25 [2022-01-31 17:01:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,278 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 105 transitions. [2022-01-31 17:01:16,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 105 transitions. [2022-01-31 17:01:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:01:16,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:01:16,279 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash 589769810, now seen corresponding path program 2 times [2022-01-31 17:01:16,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202871038] [2022-01-31 17:01:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,284 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:01:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:16,442 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202871038] [2022-01-31 17:01:16,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1202871038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:01:16,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6074859] [2022-01-31 17:01:16,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:01:16,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:01:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:16,443 INFO L87 Difference]: Start difference. First operand 78 states and 105 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,882 INFO L93 Difference]: Finished difference Result 146 states and 207 transitions. [2022-01-31 17:01:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-01-31 17:01:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,884 INFO L225 Difference]: With dead ends: 146 [2022-01-31 17:01:16,884 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 17:01:16,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:01:16,885 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 109 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 17:01:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 79. [2022-01-31 17:01:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 64 states have internal predecessors, (79), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (16), 8 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-31 17:01:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2022-01-31 17:01:16,915 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 25 [2022-01-31 17:01:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,916 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2022-01-31 17:01:16,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2022-01-31 17:01:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 17:01:16,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:01:16,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1155502753, now seen corresponding path program 1 times [2022-01-31 17:01:16,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768145353] [2022-01-31 17:01:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,920 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 17:01:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:16,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768145353] [2022-01-31 17:01:16,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1768145353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:16,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836270752] [2022-01-31 17:01:16,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:16,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:16,951 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:17,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,037 INFO L93 Difference]: Finished difference Result 103 states and 142 transitions. [2022-01-31 17:01:17,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:17,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 17:01:17,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,038 INFO L225 Difference]: With dead ends: 103 [2022-01-31 17:01:17,038 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 17:01:17,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:17,039 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 68 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 67 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:17,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 17:01:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-01-31 17:01:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 66 states have internal predecessors, (83), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2022-01-31 17:01:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2022-01-31 17:01:17,067 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 26 [2022-01-31 17:01:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,067 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2022-01-31 17:01:17,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2022-01-31 17:01:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:01:17,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:01:17,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash 814310040, now seen corresponding path program 1 times [2022-01-31 17:01:17,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007672019] [2022-01-31 17:01:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,070 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,070 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 17:01:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:17,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007672019] [2022-01-31 17:01:17,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007672019] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:17,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941968695] [2022-01-31 17:01:17,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:17,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:17,099 INFO L87 Difference]: Start difference. First operand 81 states and 108 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,224 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2022-01-31 17:01:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:17,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-01-31 17:01:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,226 INFO L225 Difference]: With dead ends: 99 [2022-01-31 17:01:17,226 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 17:01:17,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:17,226 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 68 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:17,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 17:01:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-01-31 17:01:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 67 states have internal predecessors, (84), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2022-01-31 17:01:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2022-01-31 17:01:17,261 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 27 [2022-01-31 17:01:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,262 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2022-01-31 17:01:17,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2022-01-31 17:01:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:01:17,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:01:17,263 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash 380015536, now seen corresponding path program 2 times [2022-01-31 17:01:17,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005811259] [2022-01-31 17:01:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,265 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,265 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,267 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:17,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005811259] [2022-01-31 17:01:17,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1005811259] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:01:17,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385380288] [2022-01-31 17:01:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:01:17,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:01:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:17,468 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:18,079 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2022-01-31 17:01:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:01:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-01-31 17:01:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:18,080 INFO L225 Difference]: With dead ends: 165 [2022-01-31 17:01:18,080 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 17:01:18,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:18,081 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 297 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:18,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 114 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 17:01:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2022-01-31 17:01:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 62 states have internal predecessors, (78), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-01-31 17:01:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2022-01-31 17:01:18,106 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 27 [2022-01-31 17:01:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:18,107 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2022-01-31 17:01:18,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2022-01-31 17:01:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 17:01:18,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:18,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:18,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:01:18,108 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash -923471890, now seen corresponding path program 1 times [2022-01-31 17:01:18,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159544107] [2022-01-31 17:01:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:18,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:18,109 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:18,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:18,111 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:01:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:18,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:18,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159544107] [2022-01-31 17:01:18,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [159544107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:18,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:18,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:01:18,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926338302] [2022-01-31 17:01:18,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:18,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:01:18,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:01:18,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:18,409 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,457 INFO L93 Difference]: Finished difference Result 180 states and 257 transitions. [2022-01-31 17:01:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:01:19,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-01-31 17:01:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,459 INFO L225 Difference]: With dead ends: 180 [2022-01-31 17:01:19,459 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 17:01:19,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:01:19,460 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 337 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 118 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:01:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 17:01:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 91. [2022-01-31 17:01:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.352112676056338) internal successors, (96), 76 states have internal predecessors, (96), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (16), 8 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-31 17:01:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2022-01-31 17:01:19,493 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 28 [2022-01-31 17:01:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,493 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2022-01-31 17:01:19,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2022-01-31 17:01:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 17:01:19,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:19,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:01:19,494 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,494 INFO L85 PathProgramCache]: Analyzing trace with hash -238139474, now seen corresponding path program 1 times [2022-01-31 17:01:19,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102345662] [2022-01-31 17:01:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,496 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:01:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:19,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102345662] [2022-01-31 17:01:19,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102345662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:19,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826580826] [2022-01-31 17:01:19,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:19,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:19,610 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,941 INFO L93 Difference]: Finished difference Result 145 states and 197 transitions. [2022-01-31 17:01:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:19,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-01-31 17:01:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,942 INFO L225 Difference]: With dead ends: 145 [2022-01-31 17:01:19,943 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 17:01:19,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:19,943 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 153 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 76 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 17:01:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2022-01-31 17:01:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.323076923076923) internal successors, (86), 68 states have internal predecessors, (86), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-31 17:01:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2022-01-31 17:01:19,975 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 28 [2022-01-31 17:01:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,975 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2022-01-31 17:01:19,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2022-01-31 17:01:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 17:01:19,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:19,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:01:19,976 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash 149699472, now seen corresponding path program 2 times [2022-01-31 17:01:19,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790168372] [2022-01-31 17:01:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,977 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,977 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,979 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:20,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:20,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790168372] [2022-01-31 17:01:20,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [790168372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:20,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:20,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:01:20,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994417751] [2022-01-31 17:01:20,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:20,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:01:20,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:01:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:20,300 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:21,244 INFO L93 Difference]: Finished difference Result 147 states and 202 transitions. [2022-01-31 17:01:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:01:21,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-01-31 17:01:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:21,246 INFO L225 Difference]: With dead ends: 147 [2022-01-31 17:01:21,246 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 17:01:21,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:01:21,246 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 315 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:21,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 125 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:01:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 17:01:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 68. [2022-01-31 17:01:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 17:01:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-01-31 17:01:21,277 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 30 [2022-01-31 17:01:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:21,277 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-01-31 17:01:21,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-01-31 17:01:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 17:01:21,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:21,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:21,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:01:21,278 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:21,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1223836212, now seen corresponding path program 1 times [2022-01-31 17:01:21,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:21,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508994270] [2022-01-31 17:01:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:21,279 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:21,279 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:21,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:21,281 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:01:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:21,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508994270] [2022-01-31 17:01:21,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508994270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:21,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:21,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:01:21,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766722050] [2022-01-31 17:01:21,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:21,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:01:21,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:01:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:21,354 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:21,829 INFO L93 Difference]: Finished difference Result 136 states and 177 transitions. [2022-01-31 17:01:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:21,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (4), 3 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 32 [2022-01-31 17:01:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:21,831 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:01:21,831 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 17:01:21,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:21,835 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 179 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:21,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 84 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 17:01:21,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 85. [2022-01-31 17:01:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 17:01:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2022-01-31 17:01:21,878 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 32 [2022-01-31 17:01:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:21,878 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2022-01-31 17:01:21,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2022-01-31 17:01:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 17:01:21,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:21,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:21,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:01:21,879 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:21,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1221989170, now seen corresponding path program 1 times [2022-01-31 17:01:21,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:21,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898207815] [2022-01-31 17:01:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:21,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:21,881 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:21,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:21,883 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:01:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:21,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898207815] [2022-01-31 17:01:21,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1898207815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:21,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:21,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:01:21,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66683830] [2022-01-31 17:01:21,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:21,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:01:21,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:01:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:01:21,984 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:22,211 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2022-01-31 17:01:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:01:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (4), 3 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 32 [2022-01-31 17:01:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:22,212 INFO L225 Difference]: With dead ends: 102 [2022-01-31 17:01:22,212 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 17:01:22,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:22,213 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 123 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:22,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 58 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:22,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 17:01:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-01-31 17:01:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 70 states have internal predecessors, (90), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 17:01:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-01-31 17:01:22,259 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 32 [2022-01-31 17:01:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:22,259 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-01-31 17:01:22,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-01-31 17:01:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:01:22,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:22,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:22,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:01:22,260 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:22,260 INFO L85 PathProgramCache]: Analyzing trace with hash -807226004, now seen corresponding path program 1 times [2022-01-31 17:01:22,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:22,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790310721] [2022-01-31 17:01:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:22,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:22,261 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:22,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:22,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:01:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:22,479 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:22,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790310721] [2022-01-31 17:01:22,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790310721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:22,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:22,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:01:22,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29277868] [2022-01-31 17:01:22,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:22,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:01:22,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:01:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:22,481 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:23,305 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2022-01-31 17:01:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:01:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-01-31 17:01:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:23,307 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:01:23,307 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 17:01:23,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:01:23,307 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 217 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:23,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 84 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 17:01:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 89. [2022-01-31 17:01:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 72 states have internal predecessors, (91), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-01-31 17:01:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2022-01-31 17:01:23,366 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 35 [2022-01-31 17:01:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:23,366 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2022-01-31 17:01:23,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2022-01-31 17:01:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 17:01:23,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:23,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:23,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:01:23,367 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash -152048949, now seen corresponding path program 1 times [2022-01-31 17:01:23,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731701928] [2022-01-31 17:01:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:23,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:23,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:23,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:23,370 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:01:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:23,515 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731701928] [2022-01-31 17:01:23,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [731701928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:23,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:23,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:01:23,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286941676] [2022-01-31 17:01:23,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:23,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:01:23,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:01:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:23,517 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:24,117 INFO L93 Difference]: Finished difference Result 194 states and 261 transitions. [2022-01-31 17:01:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:01:24,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-01-31 17:01:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:24,119 INFO L225 Difference]: With dead ends: 194 [2022-01-31 17:01:24,119 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 17:01:24,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:01:24,119 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 171 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:24,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 104 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 17:01:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2022-01-31 17:01:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 90 states have internal predecessors, (111), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2022-01-31 17:01:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2022-01-31 17:01:24,200 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 36 [2022-01-31 17:01:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:24,200 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2022-01-31 17:01:24,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2022-01-31 17:01:24,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:01:24,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:24,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:24,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:01:24,201 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1738497848, now seen corresponding path program 1 times [2022-01-31 17:01:24,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:24,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149441979] [2022-01-31 17:01:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:24,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:24,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:24,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:24,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:24,257 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:24,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149441979] [2022-01-31 17:01:24,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1149441979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:24,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:24,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:01:24,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333368480] [2022-01-31 17:01:24,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:24,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:01:24,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:24,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:01:24,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:01:24,258 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:24,558 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2022-01-31 17:01:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:01:24,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-01-31 17:01:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:24,559 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:01:24,559 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 17:01:24,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:01:24,560 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:24,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 99 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 17:01:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-01-31 17:01:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 109 states have internal predecessors, (141), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2022-01-31 17:01:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 170 transitions. [2022-01-31 17:01:24,641 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 170 transitions. Word has length 37 [2022-01-31 17:01:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:24,641 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 170 transitions. [2022-01-31 17:01:24,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 170 transitions. [2022-01-31 17:01:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:01:24,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:24,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:24,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:01:24,642 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:24,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1736650806, now seen corresponding path program 2 times [2022-01-31 17:01:24,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:24,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499602800] [2022-01-31 17:01:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:24,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:24,644 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:24,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:24,645 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:24,756 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499602800] [2022-01-31 17:01:24,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [499602800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:24,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:24,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:24,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231144203] [2022-01-31 17:01:24,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:24,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:24,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:24,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:24,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:24,758 INFO L87 Difference]: Start difference. First operand 126 states and 170 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:25,374 INFO L93 Difference]: Finished difference Result 169 states and 228 transitions. [2022-01-31 17:01:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:25,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (4), 3 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 37 [2022-01-31 17:01:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:25,385 INFO L225 Difference]: With dead ends: 169 [2022-01-31 17:01:25,385 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 17:01:25,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:25,386 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 188 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:25,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 123 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 17:01:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 131. [2022-01-31 17:01:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 114 states have internal predecessors, (148), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2022-01-31 17:01:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 177 transitions. [2022-01-31 17:01:25,474 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 177 transitions. Word has length 37 [2022-01-31 17:01:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:25,475 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 177 transitions. [2022-01-31 17:01:25,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 177 transitions. [2022-01-31 17:01:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:01:25,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:25,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:25,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:01:25,476 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:25,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:25,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1747122822, now seen corresponding path program 1 times [2022-01-31 17:01:25,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:25,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222569227] [2022-01-31 17:01:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:25,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:25,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:25,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:25,479 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:25,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:25,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222569227] [2022-01-31 17:01:25,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222569227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:25,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:25,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:01:25,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533797718] [2022-01-31 17:01:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:25,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:01:25,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:01:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:25,786 INFO L87 Difference]: Start difference. First operand 131 states and 177 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:26,489 INFO L93 Difference]: Finished difference Result 232 states and 326 transitions. [2022-01-31 17:01:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:01:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-01-31 17:01:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:26,499 INFO L225 Difference]: With dead ends: 232 [2022-01-31 17:01:26,499 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 17:01:26,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:01:26,500 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 150 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:26,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 102 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 17:01:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 148. [2022-01-31 17:01:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 124 states have (on average 1.346774193548387) internal successors, (167), 129 states have internal predecessors, (167), 12 states have call successors, (12), 6 states have call predecessors, (12), 11 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-31 17:01:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 199 transitions. [2022-01-31 17:01:26,602 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 199 transitions. Word has length 37 [2022-01-31 17:01:26,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:26,602 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 199 transitions. [2022-01-31 17:01:26,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 199 transitions. [2022-01-31 17:01:26,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 17:01:26,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:26,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:26,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:01:26,603 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:26,603 INFO L85 PathProgramCache]: Analyzing trace with hash 800748653, now seen corresponding path program 2 times [2022-01-31 17:01:26,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514997387] [2022-01-31 17:01:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:26,605 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:26,605 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:26,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:26,606 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:26,917 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514997387] [2022-01-31 17:01:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [514997387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:26,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:26,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:01:26,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330913897] [2022-01-31 17:01:26,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:26,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:01:26,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:01:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:01:26,918 INFO L87 Difference]: Start difference. First operand 148 states and 199 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:28,648 INFO L93 Difference]: Finished difference Result 368 states and 518 transitions. [2022-01-31 17:01:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:01:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-01-31 17:01:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:28,651 INFO L225 Difference]: With dead ends: 368 [2022-01-31 17:01:28,651 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 17:01:28,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:01:28,652 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 314 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:28,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 157 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:01:28,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 17:01:28,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 153. [2022-01-31 17:01:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 129 states have (on average 1.3333333333333333) internal successors, (172), 134 states have internal predecessors, (172), 12 states have call successors, (12), 6 states have call predecessors, (12), 11 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-31 17:01:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 204 transitions. [2022-01-31 17:01:28,796 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 204 transitions. Word has length 38 [2022-01-31 17:01:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:28,796 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 204 transitions. [2022-01-31 17:01:28,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 204 transitions. [2022-01-31 17:01:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 17:01:28,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:28,797 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:28,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:01:28,797 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1240873514, now seen corresponding path program 1 times [2022-01-31 17:01:28,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:28,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044633569] [2022-01-31 17:01:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:28,799 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:28,799 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:28,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:28,800 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:01:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 17:01:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:28,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:28,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044633569] [2022-01-31 17:01:28,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044633569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:28,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:28,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:01:28,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681577854] [2022-01-31 17:01:28,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:28,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:01:28,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:01:28,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:28,878 INFO L87 Difference]: Start difference. First operand 153 states and 204 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:29,290 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2022-01-31 17:01:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-01-31 17:01:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:29,292 INFO L225 Difference]: With dead ends: 193 [2022-01-31 17:01:29,292 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 17:01:29,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:29,292 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 140 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:29,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 82 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 17:01:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2022-01-31 17:01:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 129 states have (on average 1.3333333333333333) internal successors, (172), 134 states have internal predecessors, (172), 10 states have call successors, (10), 6 states have call predecessors, (10), 11 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-31 17:01:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-01-31 17:01:29,424 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 40 [2022-01-31 17:01:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:29,424 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-01-31 17:01:29,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-01-31 17:01:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 17:01:29,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:29,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:29,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:01:29,425 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:29,426 INFO L85 PathProgramCache]: Analyzing trace with hash -60624402, now seen corresponding path program 2 times [2022-01-31 17:01:29,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:29,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018805715] [2022-01-31 17:01:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:29,427 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:29,427 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:29,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:29,428 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:29,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:29,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018805715] [2022-01-31 17:01:29,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2018805715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:29,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:29,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:01:29,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106330439] [2022-01-31 17:01:29,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:29,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:01:29,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:01:29,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:29,486 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:29,849 INFO L93 Difference]: Finished difference Result 171 states and 223 transitions. [2022-01-31 17:01:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-01-31 17:01:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:29,850 INFO L225 Difference]: With dead ends: 171 [2022-01-31 17:01:29,850 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 17:01:29,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:29,850 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 90 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:29,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 107 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 17:01:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2022-01-31 17:01:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 135 states have (on average 1.3333333333333333) internal successors, (180), 140 states have internal predecessors, (180), 10 states have call successors, (10), 6 states have call predecessors, (10), 11 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-31 17:01:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2022-01-31 17:01:29,972 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 40 [2022-01-31 17:01:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:29,972 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2022-01-31 17:01:29,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2022-01-31 17:01:29,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 17:01:29,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:29,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:29,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:01:29,973 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:29,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash -868123986, now seen corresponding path program 1 times [2022-01-31 17:01:29,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:29,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935055046] [2022-01-31 17:01:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:29,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:29,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:29,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:29,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:30,202 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935055046] [2022-01-31 17:01:30,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [935055046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:30,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:30,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:01:30,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259493158] [2022-01-31 17:01:30,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:30,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:01:30,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:30,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:01:30,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:30,203 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:31,236 INFO L93 Difference]: Finished difference Result 310 states and 425 transitions. [2022-01-31 17:01:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:01:31,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-01-31 17:01:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:31,237 INFO L225 Difference]: With dead ends: 310 [2022-01-31 17:01:31,237 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 17:01:31,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:01:31,238 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 315 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:31,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 114 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:31,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 17:01:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 170. [2022-01-31 17:01:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 152 states have internal predecessors, (197), 10 states have call successors, (10), 6 states have call predecessors, (10), 11 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-31 17:01:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 223 transitions. [2022-01-31 17:01:31,390 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 223 transitions. Word has length 40 [2022-01-31 17:01:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:31,390 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 223 transitions. [2022-01-31 17:01:31,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 223 transitions. [2022-01-31 17:01:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:01:31,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:31,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:31,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:01:31,391 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash -625250517, now seen corresponding path program 1 times [2022-01-31 17:01:31,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:31,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196639812] [2022-01-31 17:01:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:31,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:31,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:31,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:31,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:31,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196639812] [2022-01-31 17:01:31,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [196639812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:31,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:31,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:01:31,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002389275] [2022-01-31 17:01:31,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:31,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:01:31,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:31,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:01:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:01:31,463 INFO L87 Difference]: Start difference. First operand 170 states and 223 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:31,804 INFO L93 Difference]: Finished difference Result 179 states and 231 transitions. [2022-01-31 17:01:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:01:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (4), 3 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 41 [2022-01-31 17:01:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:31,805 INFO L225 Difference]: With dead ends: 179 [2022-01-31 17:01:31,805 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 17:01:31,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:31,805 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 75 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:31,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 91 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 17:01:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2022-01-31 17:01:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 113 states have (on average 1.336283185840708) internal successors, (151), 116 states have internal predecessors, (151), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-31 17:01:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2022-01-31 17:01:31,907 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 41 [2022-01-31 17:01:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:31,907 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2022-01-31 17:01:31,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2022-01-31 17:01:31,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:01:31,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:31,908 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:31,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:01:31,908 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash 637814536, now seen corresponding path program 3 times [2022-01-31 17:01:31,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:31,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592077509] [2022-01-31 17:01:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:31,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:31,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:31,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:31,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:31,980 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:31,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592077509] [2022-01-31 17:01:31,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [592077509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:31,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:31,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:31,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363537449] [2022-01-31 17:01:31,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:31,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:31,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:31,981 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:32,381 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2022-01-31 17:01:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:01:32,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-01-31 17:01:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:32,383 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:01:32,383 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 17:01:32,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:01:32,384 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 89 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:32,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 114 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 17:01:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-01-31 17:01:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 119 states have (on average 1.3361344537815125) internal successors, (159), 122 states have internal predecessors, (159), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-31 17:01:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2022-01-31 17:01:32,489 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 43 [2022-01-31 17:01:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:32,489 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2022-01-31 17:01:32,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2022-01-31 17:01:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:01:32,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:32,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:32,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:01:32,490 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:32,490 INFO L85 PathProgramCache]: Analyzing trace with hash 375638793, now seen corresponding path program 2 times [2022-01-31 17:01:32,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:32,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534929002] [2022-01-31 17:01:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:32,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:32,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:32,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:32,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:32,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:32,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:01:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:32,890 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:32,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534929002] [2022-01-31 17:01:32,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [534929002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:32,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:32,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:01:32,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707261434] [2022-01-31 17:01:32,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:32,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:01:32,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:01:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:32,892 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:34,119 INFO L93 Difference]: Finished difference Result 228 states and 304 transitions. [2022-01-31 17:01:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:01:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-01-31 17:01:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:34,120 INFO L225 Difference]: With dead ends: 228 [2022-01-31 17:01:34,121 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 17:01:34,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:01:34,121 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 158 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:34,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 131 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:01:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 17:01:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2022-01-31 17:01:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.3383458646616542) internal successors, (178), 136 states have internal predecessors, (178), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-01-31 17:01:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2022-01-31 17:01:34,244 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 43 [2022-01-31 17:01:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:34,245 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2022-01-31 17:01:34,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2022-01-31 17:01:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 17:01:34,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:34,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:34,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:01:34,245 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:34,246 INFO L85 PathProgramCache]: Analyzing trace with hash -961708998, now seen corresponding path program 1 times [2022-01-31 17:01:34,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:34,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522874076] [2022-01-31 17:01:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:34,247 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:34,247 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:34,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:34,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:01:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:34,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:34,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522874076] [2022-01-31 17:01:34,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [522874076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:34,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:34,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:01:34,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346144882] [2022-01-31 17:01:34,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:34,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:01:34,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:34,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:01:34,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:34,774 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:39,850 INFO L93 Difference]: Finished difference Result 313 states and 415 transitions. [2022-01-31 17:01:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:01:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-01-31 17:01:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:39,852 INFO L225 Difference]: With dead ends: 313 [2022-01-31 17:01:39,852 INFO L226 Difference]: Without dead ends: 305 [2022-01-31 17:01:39,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:01:39,853 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 361 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:39,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 147 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:01:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-31 17:01:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 187. [2022-01-31 17:01:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 164 states have (on average 1.3414634146341464) internal successors, (220), 168 states have internal predecessors, (220), 9 states have call successors, (9), 6 states have call predecessors, (9), 13 states have return successors, (16), 12 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-31 17:01:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 245 transitions. [2022-01-31 17:01:40,037 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 245 transitions. Word has length 45 [2022-01-31 17:01:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:40,037 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 245 transitions. [2022-01-31 17:01:40,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 245 transitions. [2022-01-31 17:01:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 17:01:40,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:40,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:40,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:01:40,038 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash -896665108, now seen corresponding path program 1 times [2022-01-31 17:01:40,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:40,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631122638] [2022-01-31 17:01:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:40,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:40,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:40,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:40,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:01:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:40,150 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:40,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631122638] [2022-01-31 17:01:40,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [631122638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:40,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:40,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:40,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59589621] [2022-01-31 17:01:40,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:40,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:40,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:40,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:40,152 INFO L87 Difference]: Start difference. First operand 187 states and 245 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:41,030 INFO L93 Difference]: Finished difference Result 369 states and 496 transitions. [2022-01-31 17:01:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:41,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (4), 3 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 45 [2022-01-31 17:01:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:41,031 INFO L225 Difference]: With dead ends: 369 [2022-01-31 17:01:41,031 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 17:01:41,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:41,032 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 205 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:41,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 101 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 17:01:41,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 237. [2022-01-31 17:01:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 212 states have (on average 1.3254716981132075) internal successors, (281), 213 states have internal predecessors, (281), 11 states have call successors, (11), 6 states have call predecessors, (11), 13 states have return successors, (22), 17 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-31 17:01:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2022-01-31 17:01:41,272 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 45 [2022-01-31 17:01:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:41,272 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2022-01-31 17:01:41,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:41,272 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2022-01-31 17:01:41,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 17:01:41,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:41,273 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:41,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:01:41,273 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1284332626, now seen corresponding path program 4 times [2022-01-31 17:01:41,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:41,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413230990] [2022-01-31 17:01:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:41,275 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:41,275 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:41,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:41,278 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:41,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:41,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:41,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:41,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413230990] [2022-01-31 17:01:41,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413230990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:41,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:41,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:01:41,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511760889] [2022-01-31 17:01:41,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:41,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:01:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:01:41,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:41,384 INFO L87 Difference]: Start difference. First operand 237 states and 314 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:41,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:41,992 INFO L93 Difference]: Finished difference Result 266 states and 352 transitions. [2022-01-31 17:01:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:41,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-01-31 17:01:41,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:41,994 INFO L225 Difference]: With dead ends: 266 [2022-01-31 17:01:41,994 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 17:01:41,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:41,995 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 92 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:41,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 121 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 17:01:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 246. [2022-01-31 17:01:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 221 states have (on average 1.3257918552036199) internal successors, (293), 222 states have internal predecessors, (293), 11 states have call successors, (11), 6 states have call predecessors, (11), 13 states have return successors, (22), 17 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-31 17:01:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 326 transitions. [2022-01-31 17:01:42,240 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 326 transitions. Word has length 46 [2022-01-31 17:01:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:42,240 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 326 transitions. [2022-01-31 17:01:42,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 326 transitions. [2022-01-31 17:01:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 17:01:42,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:42,246 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:42,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:01:42,246 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:42,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1284317345, now seen corresponding path program 1 times [2022-01-31 17:01:42,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:42,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925330034] [2022-01-31 17:01:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:42,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:42,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:42,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:42,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:01:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:42,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:42,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925330034] [2022-01-31 17:01:42,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [925330034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:42,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:42,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:01:42,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506518945] [2022-01-31 17:01:42,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:42,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:01:42,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:01:42,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:42,419 INFO L87 Difference]: Start difference. First operand 246 states and 326 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:43,218 INFO L93 Difference]: Finished difference Result 371 states and 492 transitions. [2022-01-31 17:01:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:01:43,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-01-31 17:01:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:43,220 INFO L225 Difference]: With dead ends: 371 [2022-01-31 17:01:43,220 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 17:01:43,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:01:43,223 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 223 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:43,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 98 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 17:01:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 235. [2022-01-31 17:01:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 208 states have (on average 1.3269230769230769) internal successors, (276), 213 states have internal predecessors, (276), 11 states have call successors, (11), 6 states have call predecessors, (11), 15 states have return successors, (22), 15 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-31 17:01:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 309 transitions. [2022-01-31 17:01:43,460 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 309 transitions. Word has length 46 [2022-01-31 17:01:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:43,460 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 309 transitions. [2022-01-31 17:01:43,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 309 transitions. [2022-01-31 17:01:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:01:43,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:43,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:43,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:01:43,461 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash 13186762, now seen corresponding path program 2 times [2022-01-31 17:01:43,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:43,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275721736] [2022-01-31 17:01:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:43,463 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:43,463 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:43,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:43,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:43,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:43,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:01:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:43,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:43,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275721736] [2022-01-31 17:01:43,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1275721736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:43,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:43,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:01:43,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866760651] [2022-01-31 17:01:43,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:43,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:01:43,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:43,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:01:43,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:43,764 INFO L87 Difference]: Start difference. First operand 235 states and 309 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:44,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:44,907 INFO L93 Difference]: Finished difference Result 364 states and 491 transitions. [2022-01-31 17:01:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:01:44,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-01-31 17:01:44,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:44,911 INFO L225 Difference]: With dead ends: 364 [2022-01-31 17:01:44,911 INFO L226 Difference]: Without dead ends: 315 [2022-01-31 17:01:44,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:01:44,912 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 137 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:44,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 138 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:01:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-01-31 17:01:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 245. [2022-01-31 17:01:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 217 states have (on average 1.327188940092166) internal successors, (288), 222 states have internal predecessors, (288), 11 states have call successors, (11), 6 states have call predecessors, (11), 16 states have return successors, (23), 16 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-31 17:01:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 322 transitions. [2022-01-31 17:01:45,163 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 322 transitions. Word has length 47 [2022-01-31 17:01:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:45,163 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 322 transitions. [2022-01-31 17:01:45,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 322 transitions. [2022-01-31 17:01:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 17:01:45,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:45,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:45,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:01:45,164 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:45,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:45,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1151286849, now seen corresponding path program 2 times [2022-01-31 17:01:45,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:45,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087524477] [2022-01-31 17:01:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:45,166 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:45,166 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:45,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:45,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:45,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:45,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:01:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:45,290 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:45,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087524477] [2022-01-31 17:01:45,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087524477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:45,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:45,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:01:45,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947612423] [2022-01-31 17:01:45,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:45,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:01:45,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:45,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:01:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:45,291 INFO L87 Difference]: Start difference. First operand 245 states and 322 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:46,314 INFO L93 Difference]: Finished difference Result 346 states and 459 transitions. [2022-01-31 17:01:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:01:46,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (4), 3 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 48 [2022-01-31 17:01:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:46,316 INFO L225 Difference]: With dead ends: 346 [2022-01-31 17:01:46,316 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 17:01:46,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:46,317 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 155 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:46,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 149 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 17:01:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 251. [2022-01-31 17:01:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 223 states have (on average 1.3318385650224216) internal successors, (297), 228 states have internal predecessors, (297), 11 states have call successors, (11), 6 states have call predecessors, (11), 16 states have return successors, (23), 16 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-31 17:01:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 331 transitions. [2022-01-31 17:01:46,569 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 331 transitions. Word has length 48 [2022-01-31 17:01:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:46,570 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 331 transitions. [2022-01-31 17:01:46,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 331 transitions. [2022-01-31 17:01:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 17:01:46,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:46,571 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:46,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:01:46,571 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:46,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:46,571 INFO L85 PathProgramCache]: Analyzing trace with hash 828521800, now seen corresponding path program 5 times [2022-01-31 17:01:46,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:46,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519592596] [2022-01-31 17:01:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:46,572 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:46,572 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:46,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:46,574 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:46,676 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:46,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519592596] [2022-01-31 17:01:46,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519592596] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:46,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:46,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:01:46,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178282391] [2022-01-31 17:01:46,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:46,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:01:46,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:46,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:01:46,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:46,677 INFO L87 Difference]: Start difference. First operand 251 states and 331 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:47,378 INFO L93 Difference]: Finished difference Result 279 states and 368 transitions. [2022-01-31 17:01:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:01:47,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-01-31 17:01:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:47,380 INFO L225 Difference]: With dead ends: 279 [2022-01-31 17:01:47,380 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 17:01:47,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:01:47,380 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 96 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:47,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 128 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 17:01:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 260. [2022-01-31 17:01:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 232 states have (on average 1.331896551724138) internal successors, (309), 237 states have internal predecessors, (309), 11 states have call successors, (11), 6 states have call predecessors, (11), 16 states have return successors, (23), 16 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-31 17:01:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 343 transitions. [2022-01-31 17:01:47,650 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 343 transitions. Word has length 49 [2022-01-31 17:01:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:47,651 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 343 transitions. [2022-01-31 17:01:47,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:01:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 343 transitions. [2022-01-31 17:01:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:01:47,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:47,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:47,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:01:47,652 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1651221761, now seen corresponding path program 1 times [2022-01-31 17:01:47,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000815895] [2022-01-31 17:01:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:47,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:47,661 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:47,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:47,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 17:01:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 17:01:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:47,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:47,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000815895] [2022-01-31 17:01:47,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000815895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:47,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:47,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:01:47,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399066536] [2022-01-31 17:01:47,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:47,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:01:47,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:01:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:47,790 INFO L87 Difference]: Start difference. First operand 260 states and 343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 17:01:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:48,415 INFO L93 Difference]: Finished difference Result 318 states and 420 transitions. [2022-01-31 17:01:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:01:48,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-01-31 17:01:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:48,417 INFO L225 Difference]: With dead ends: 318 [2022-01-31 17:01:48,417 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 17:01:48,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:48,417 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 99 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:48,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 87 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 17:01:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 266. [2022-01-31 17:01:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 237 states have (on average 1.3291139240506329) internal successors, (315), 242 states have internal predecessors, (315), 12 states have call successors, (12), 6 states have call predecessors, (12), 16 states have return successors, (24), 17 states have call predecessors, (24), 10 states have call successors, (24) [2022-01-31 17:01:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 351 transitions. [2022-01-31 17:01:48,699 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 351 transitions. Word has length 51 [2022-01-31 17:01:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:48,699 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 351 transitions. [2022-01-31 17:01:48,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 17:01:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 351 transitions. [2022-01-31 17:01:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:01:48,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:48,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:48,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:01:48,700 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash -37721981, now seen corresponding path program 1 times [2022-01-31 17:01:48,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:48,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940304416] [2022-01-31 17:01:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:48,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:48,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:48,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:48,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 17:01:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 17:01:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:48,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:48,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940304416] [2022-01-31 17:01:48,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [940304416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:48,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:48,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:01:48,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7764253] [2022-01-31 17:01:48,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:48,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:01:48,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:01:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:01:48,801 INFO L87 Difference]: Start difference. First operand 266 states and 351 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 17:01:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:49,305 INFO L93 Difference]: Finished difference Result 305 states and 401 transitions. [2022-01-31 17:01:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:01:49,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-01-31 17:01:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:49,306 INFO L225 Difference]: With dead ends: 305 [2022-01-31 17:01:49,306 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 17:01:49,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:49,307 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:49,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 77 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 17:01:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 265. [2022-01-31 17:01:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 236 states have (on average 1.3305084745762712) internal successors, (314), 241 states have internal predecessors, (314), 12 states have call successors, (12), 6 states have call predecessors, (12), 16 states have return successors, (24), 17 states have call predecessors, (24), 10 states have call successors, (24) [2022-01-31 17:01:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 350 transitions. [2022-01-31 17:01:49,583 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 350 transitions. Word has length 51 [2022-01-31 17:01:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:49,583 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 350 transitions. [2022-01-31 17:01:49,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 17:01:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 350 transitions. [2022-01-31 17:01:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 17:01:49,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:49,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:49,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:01:49,584 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash 330269069, now seen corresponding path program 1 times [2022-01-31 17:01:49,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:49,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704384728] [2022-01-31 17:01:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:49,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:49,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:49,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:49,587 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:01:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 17:01:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 17:01:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:49,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:49,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704384728] [2022-01-31 17:01:49,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [704384728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:49,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:49,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:49,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221460354] [2022-01-31 17:01:49,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:49,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:49,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:49,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:49,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:49,683 INFO L87 Difference]: Start difference. First operand 265 states and 350 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:01:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:50,360 INFO L93 Difference]: Finished difference Result 337 states and 441 transitions. [2022-01-31 17:01:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:50,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 52 [2022-01-31 17:01:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:50,362 INFO L225 Difference]: With dead ends: 337 [2022-01-31 17:01:50,362 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 17:01:50,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:50,362 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:50,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 77 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 17:01:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 262. [2022-01-31 17:01:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 234 states have (on average 1.3333333333333333) internal successors, (312), 238 states have internal predecessors, (312), 12 states have call successors, (12), 6 states have call predecessors, (12), 15 states have return successors, (21), 17 states have call predecessors, (21), 10 states have call successors, (21) [2022-01-31 17:01:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 345 transitions. [2022-01-31 17:01:50,642 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 345 transitions. Word has length 52 [2022-01-31 17:01:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:50,642 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 345 transitions. [2022-01-31 17:01:50,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:01:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 345 transitions. [2022-01-31 17:01:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 17:01:50,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:50,643 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:50,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:01:50,643 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1929145678, now seen corresponding path program 3 times [2022-01-31 17:01:50,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:50,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248553372] [2022-01-31 17:01:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:50,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:50,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:50,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:50,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:50,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:50,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:01:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:51,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:51,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248553372] [2022-01-31 17:01:51,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248553372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:51,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:51,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:01:51,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354030832] [2022-01-31 17:01:51,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:51,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:01:51,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:01:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:01:51,209 INFO L87 Difference]: Start difference. First operand 262 states and 345 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:53,978 INFO L93 Difference]: Finished difference Result 637 states and 870 transitions. [2022-01-31 17:01:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:01:53,979 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-01-31 17:01:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:53,981 INFO L225 Difference]: With dead ends: 637 [2022-01-31 17:01:53,981 INFO L226 Difference]: Without dead ends: 571 [2022-01-31 17:01:53,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:01:53,982 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 458 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:53,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 167 Invalid, 2596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:01:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-31 17:01:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 299. [2022-01-31 17:01:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 266 states have (on average 1.3609022556390977) internal successors, (362), 275 states have internal predecessors, (362), 13 states have call successors, (13), 6 states have call predecessors, (13), 19 states have return successors, (36), 17 states have call predecessors, (36), 11 states have call successors, (36) [2022-01-31 17:01:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 411 transitions. [2022-01-31 17:01:54,313 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 411 transitions. Word has length 50 [2022-01-31 17:01:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:54,313 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 411 transitions. [2022-01-31 17:01:54,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 411 transitions. [2022-01-31 17:01:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:01:54,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:54,315 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:54,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:01:54,315 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1192649943, now seen corresponding path program 3 times [2022-01-31 17:01:54,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:54,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793559083] [2022-01-31 17:01:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:54,317 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:54,317 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:54,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:54,319 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:01:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:54,615 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:54,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793559083] [2022-01-31 17:01:54,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793559083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:54,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:54,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:01:54,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480585980] [2022-01-31 17:01:54,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:54,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:01:54,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:01:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:54,616 INFO L87 Difference]: Start difference. First operand 299 states and 411 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:57,686 INFO L93 Difference]: Finished difference Result 621 states and 861 transitions. [2022-01-31 17:01:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:01:57,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (4), 3 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 51 [2022-01-31 17:01:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:57,689 INFO L225 Difference]: With dead ends: 621 [2022-01-31 17:01:57,689 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 17:01:57,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=441, Invalid=1721, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:01:57,690 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 435 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:57,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 155 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:01:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 17:01:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 326. [2022-01-31 17:01:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 291 states have (on average 1.3539518900343643) internal successors, (394), 299 states have internal predecessors, (394), 15 states have call successors, (15), 6 states have call predecessors, (15), 19 states have return successors, (62), 20 states have call predecessors, (62), 13 states have call successors, (62) [2022-01-31 17:01:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 471 transitions. [2022-01-31 17:01:58,079 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 471 transitions. Word has length 51 [2022-01-31 17:01:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:58,079 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 471 transitions. [2022-01-31 17:01:58,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 471 transitions. [2022-01-31 17:01:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:01:58,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:58,080 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:58,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:01:58,081 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:58,081 INFO L85 PathProgramCache]: Analyzing trace with hash -711772953, now seen corresponding path program 1 times [2022-01-31 17:01:58,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:58,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105234755] [2022-01-31 17:01:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:58,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:58,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:58,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:58,084 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:58,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:58,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:01:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:58,399 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:58,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105234755] [2022-01-31 17:01:58,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [105234755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:58,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:58,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:01:58,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328255016] [2022-01-31 17:01:58,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:58,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:01:58,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:58,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:01:58,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:01:58,400 INFO L87 Difference]: Start difference. First operand 326 states and 471 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:00,771 INFO L93 Difference]: Finished difference Result 712 states and 1004 transitions. [2022-01-31 17:02:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:02:00,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-01-31 17:02:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:00,774 INFO L225 Difference]: With dead ends: 712 [2022-01-31 17:02:00,774 INFO L226 Difference]: Without dead ends: 680 [2022-01-31 17:02:00,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:02:00,775 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 445 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:00,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 143 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:02:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-01-31 17:02:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 385. [2022-01-31 17:02:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 346 states have (on average 1.3323699421965318) internal successors, (461), 352 states have internal predecessors, (461), 15 states have call successors, (15), 6 states have call predecessors, (15), 23 states have return successors, (78), 26 states have call predecessors, (78), 13 states have call successors, (78) [2022-01-31 17:02:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 554 transitions. [2022-01-31 17:02:01,266 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 554 transitions. Word has length 51 [2022-01-31 17:02:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:01,266 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 554 transitions. [2022-01-31 17:02:01,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 554 transitions. [2022-01-31 17:02:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 17:02:01,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:01,267 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:01,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:02:01,267 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:01,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:01,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2129003886, now seen corresponding path program 6 times [2022-01-31 17:02:01,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:01,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636739895] [2022-01-31 17:02:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:01,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:01,269 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:01,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:01,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:01,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:01,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:02:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:01,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636739895] [2022-01-31 17:02:01,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1636739895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:01,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:01,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:02:01,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435698892] [2022-01-31 17:02:01,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:01,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:02:01,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:02:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:02:01,406 INFO L87 Difference]: Start difference. First operand 385 states and 554 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:02:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:02,366 INFO L93 Difference]: Finished difference Result 414 states and 592 transitions. [2022-01-31 17:02:02,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:02:02,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-01-31 17:02:02,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:02,367 INFO L225 Difference]: With dead ends: 414 [2022-01-31 17:02:02,368 INFO L226 Difference]: Without dead ends: 405 [2022-01-31 17:02:02,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:02:02,368 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 105 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:02,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 132 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:02:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-31 17:02:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 394. [2022-01-31 17:02:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 355 states have (on average 1.332394366197183) internal successors, (473), 361 states have internal predecessors, (473), 15 states have call successors, (15), 6 states have call predecessors, (15), 23 states have return successors, (78), 26 states have call predecessors, (78), 13 states have call successors, (78) [2022-01-31 17:02:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 566 transitions. [2022-01-31 17:02:02,860 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 566 transitions. Word has length 52 [2022-01-31 17:02:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:02,860 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 566 transitions. [2022-01-31 17:02:02,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:02:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 566 transitions. [2022-01-31 17:02:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 17:02:02,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:02,861 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:02,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:02:02,861 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:02,862 INFO L85 PathProgramCache]: Analyzing trace with hash 602096621, now seen corresponding path program 1 times [2022-01-31 17:02:02,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:02,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001196174] [2022-01-31 17:02:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:02,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:02,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:02,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:02,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:03,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:03,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:02:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:03,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 17:02:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:03,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:02:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:03,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:03,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001196174] [2022-01-31 17:02:03,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1001196174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:03,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:03,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:02:03,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059217136] [2022-01-31 17:02:03,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:03,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:02:03,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:02:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:02:03,200 INFO L87 Difference]: Start difference. First operand 394 states and 566 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:02:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:05,491 INFO L93 Difference]: Finished difference Result 796 states and 1099 transitions. [2022-01-31 17:02:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:02:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2022-01-31 17:02:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:05,494 INFO L225 Difference]: With dead ends: 796 [2022-01-31 17:02:05,494 INFO L226 Difference]: Without dead ends: 727 [2022-01-31 17:02:05,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:02:05,495 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 349 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:05,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 129 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:02:05,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-31 17:02:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 400. [2022-01-31 17:02:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 359 states have (on average 1.3314763231197773) internal successors, (478), 367 states have internal predecessors, (478), 16 states have call successors, (16), 6 states have call predecessors, (16), 24 states have return successors, (81), 26 states have call predecessors, (81), 14 states have call successors, (81) [2022-01-31 17:02:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 575 transitions. [2022-01-31 17:02:06,056 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 575 transitions. Word has length 54 [2022-01-31 17:02:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:06,057 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 575 transitions. [2022-01-31 17:02:06,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:02:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 575 transitions. [2022-01-31 17:02:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 17:02:06,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:06,059 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:06,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:02:06,060 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:06,060 INFO L85 PathProgramCache]: Analyzing trace with hash -515788652, now seen corresponding path program 4 times [2022-01-31 17:02:06,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:06,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185473716] [2022-01-31 17:02:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:06,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:06,061 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:06,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:06,063 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:02:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:06,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:06,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185473716] [2022-01-31 17:02:06,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185473716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:06,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:06,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:02:06,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169727544] [2022-01-31 17:02:06,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:06,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:02:06,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:02:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:02:06,350 INFO L87 Difference]: Start difference. First operand 400 states and 575 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:09,196 INFO L93 Difference]: Finished difference Result 917 states and 1282 transitions. [2022-01-31 17:02:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:02:09,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (4), 3 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 52 [2022-01-31 17:02:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:09,199 INFO L225 Difference]: With dead ends: 917 [2022-01-31 17:02:09,200 INFO L226 Difference]: Without dead ends: 909 [2022-01-31 17:02:09,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:02:09,201 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 409 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:09,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 176 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:02:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-31 17:02:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 403. [2022-01-31 17:02:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 362 states have (on average 1.328729281767956) internal successors, (481), 370 states have internal predecessors, (481), 16 states have call successors, (16), 6 states have call predecessors, (16), 24 states have return successors, (81), 26 states have call predecessors, (81), 14 states have call successors, (81) [2022-01-31 17:02:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 578 transitions. [2022-01-31 17:02:09,771 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 578 transitions. Word has length 52 [2022-01-31 17:02:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:09,771 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 578 transitions. [2022-01-31 17:02:09,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 578 transitions. [2022-01-31 17:02:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:02:09,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:09,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:09,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:02:09,785 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:09,785 INFO L85 PathProgramCache]: Analyzing trace with hash 454886133, now seen corresponding path program 4 times [2022-01-31 17:02:09,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:09,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979611060] [2022-01-31 17:02:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:09,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:09,787 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:09,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:09,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:09,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:10,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:02:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:10,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:10,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979611060] [2022-01-31 17:02:10,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1979611060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:10,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:10,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:02:10,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556025628] [2022-01-31 17:02:10,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:10,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:02:10,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:02:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:02:10,170 INFO L87 Difference]: Start difference. First operand 403 states and 578 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:11,797 INFO L93 Difference]: Finished difference Result 701 states and 987 transitions. [2022-01-31 17:02:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:02:11,798 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-01-31 17:02:11,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:11,799 INFO L225 Difference]: With dead ends: 701 [2022-01-31 17:02:11,800 INFO L226 Difference]: Without dead ends: 497 [2022-01-31 17:02:11,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:02:11,801 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 189 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:11,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 123 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-31 17:02:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 382. [2022-01-31 17:02:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 345 states have (on average 1.3130434782608695) internal successors, (453), 349 states have internal predecessors, (453), 16 states have call successors, (16), 6 states have call predecessors, (16), 20 states have return successors, (67), 26 states have call predecessors, (67), 14 states have call successors, (67) [2022-01-31 17:02:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 536 transitions. [2022-01-31 17:02:12,340 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 536 transitions. Word has length 53 [2022-01-31 17:02:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:12,341 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 536 transitions. [2022-01-31 17:02:12,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 536 transitions. [2022-01-31 17:02:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:02:12,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:12,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:12,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:02:12,342 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:12,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1894424281, now seen corresponding path program 5 times [2022-01-31 17:02:12,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:12,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247250779] [2022-01-31 17:02:12,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:12,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:12,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:12,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:12,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:12,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:12,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:02:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:12,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247250779] [2022-01-31 17:02:12,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1247250779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:12,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:12,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:02:12,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866668685] [2022-01-31 17:02:12,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:12,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:02:12,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:02:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:02:12,790 INFO L87 Difference]: Start difference. First operand 382 states and 536 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:14,531 INFO L93 Difference]: Finished difference Result 671 states and 931 transitions. [2022-01-31 17:02:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:02:14,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-01-31 17:02:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:14,533 INFO L225 Difference]: With dead ends: 671 [2022-01-31 17:02:14,533 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 17:02:14,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:02:14,535 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 226 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:14,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 131 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:02:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 17:02:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 390. [2022-01-31 17:02:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 353 states have (on average 1.3087818696883853) internal successors, (462), 355 states have internal predecessors, (462), 16 states have call successors, (16), 6 states have call predecessors, (16), 20 states have return successors, (67), 28 states have call predecessors, (67), 14 states have call successors, (67) [2022-01-31 17:02:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 545 transitions. [2022-01-31 17:02:15,078 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 545 transitions. Word has length 53 [2022-01-31 17:02:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:15,078 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 545 transitions. [2022-01-31 17:02:15,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 545 transitions. [2022-01-31 17:02:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:02:15,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:15,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:15,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:02:15,080 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:15,080 INFO L85 PathProgramCache]: Analyzing trace with hash 688361187, now seen corresponding path program 6 times [2022-01-31 17:02:15,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:15,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508389071] [2022-01-31 17:02:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:15,081 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:15,081 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:15,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:15,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:15,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:15,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:02:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:15,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508389071] [2022-01-31 17:02:15,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [508389071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:15,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:15,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:02:15,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605906005] [2022-01-31 17:02:15,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:15,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:02:15,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:02:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:02:15,466 INFO L87 Difference]: Start difference. First operand 390 states and 545 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:17,249 INFO L93 Difference]: Finished difference Result 544 states and 755 transitions. [2022-01-31 17:02:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:02:17,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-01-31 17:02:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:17,251 INFO L225 Difference]: With dead ends: 544 [2022-01-31 17:02:17,251 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 17:02:17,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:02:17,252 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 199 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:17,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 134 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:02:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 17:02:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 387. [2022-01-31 17:02:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 350 states have (on average 1.3085714285714285) internal successors, (458), 353 states have internal predecessors, (458), 16 states have call successors, (16), 6 states have call predecessors, (16), 20 states have return successors, (67), 27 states have call predecessors, (67), 14 states have call successors, (67) [2022-01-31 17:02:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 541 transitions. [2022-01-31 17:02:17,797 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 541 transitions. Word has length 53 [2022-01-31 17:02:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:17,797 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 541 transitions. [2022-01-31 17:02:17,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 541 transitions. [2022-01-31 17:02:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 17:02:17,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:17,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:17,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:02:17,798 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash -383485681, now seen corresponding path program 2 times [2022-01-31 17:02:17,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:17,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996292352] [2022-01-31 17:02:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:17,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:17,800 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:17,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:17,801 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:18,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:18,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:02:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:18,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 17:02:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:18,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 17:02:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:18,290 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996292352] [2022-01-31 17:02:18,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1996292352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:18,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:18,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:02:18,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519558210] [2022-01-31 17:02:18,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:18,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:02:18,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:02:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:02:18,291 INFO L87 Difference]: Start difference. First operand 387 states and 541 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:02:21,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:21,455 INFO L93 Difference]: Finished difference Result 638 states and 877 transitions. [2022-01-31 17:02:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:02:21,456 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-01-31 17:02:21,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:21,458 INFO L225 Difference]: With dead ends: 638 [2022-01-31 17:02:21,458 INFO L226 Difference]: Without dead ends: 574 [2022-01-31 17:02:21,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:02:21,459 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 455 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:21,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 153 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:02:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-31 17:02:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 384. [2022-01-31 17:02:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 348 states have (on average 1.3074712643678161) internal successors, (455), 350 states have internal predecessors, (455), 15 states have call successors, (15), 6 states have call predecessors, (15), 20 states have return successors, (64), 27 states have call predecessors, (64), 13 states have call successors, (64) [2022-01-31 17:02:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 534 transitions. [2022-01-31 17:02:22,037 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 534 transitions. Word has length 56 [2022-01-31 17:02:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:22,038 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 534 transitions. [2022-01-31 17:02:22,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:02:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 534 transitions. [2022-01-31 17:02:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:02:22,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:22,039 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:22,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:02:22,039 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:22,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:22,039 INFO L85 PathProgramCache]: Analyzing trace with hash -109149304, now seen corresponding path program 7 times [2022-01-31 17:02:22,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:22,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464867166] [2022-01-31 17:02:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:22,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:22,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:22,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:22,042 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:22,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:02:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:22,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:22,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464867166] [2022-01-31 17:02:22,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1464867166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:22,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:22,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:02:22,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652510906] [2022-01-31 17:02:22,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:22,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:02:22,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:02:22,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:02:22,163 INFO L87 Difference]: Start difference. First operand 384 states and 534 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:02:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:23,261 INFO L93 Difference]: Finished difference Result 413 states and 572 transitions. [2022-01-31 17:02:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:02:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-01-31 17:02:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:23,263 INFO L225 Difference]: With dead ends: 413 [2022-01-31 17:02:23,263 INFO L226 Difference]: Without dead ends: 404 [2022-01-31 17:02:23,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:02:23,264 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 109 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:23,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 139 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-31 17:02:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 393. [2022-01-31 17:02:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 357 states have (on average 1.30812324929972) internal successors, (467), 359 states have internal predecessors, (467), 15 states have call successors, (15), 6 states have call predecessors, (15), 20 states have return successors, (64), 27 states have call predecessors, (64), 13 states have call successors, (64) [2022-01-31 17:02:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 546 transitions. [2022-01-31 17:02:23,841 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 546 transitions. Word has length 55 [2022-01-31 17:02:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:23,842 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 546 transitions. [2022-01-31 17:02:23,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:02:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 546 transitions. [2022-01-31 17:02:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:02:23,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:23,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:23,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:02:23,844 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1608168951, now seen corresponding path program 3 times [2022-01-31 17:02:23,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:23,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341915562] [2022-01-31 17:02:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:23,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:23,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:23,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:23,847 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:23,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:23,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:02:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:02:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 17:02:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:24,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:24,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341915562] [2022-01-31 17:02:24,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [341915562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:24,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:24,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:02:24,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946514809] [2022-01-31 17:02:24,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:24,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:02:24,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:24,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:02:24,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:02:24,210 INFO L87 Difference]: Start difference. First operand 393 states and 546 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:02:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:25,672 INFO L93 Difference]: Finished difference Result 570 states and 799 transitions. [2022-01-31 17:02:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:02:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-01-31 17:02:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:25,674 INFO L225 Difference]: With dead ends: 570 [2022-01-31 17:02:25,674 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 17:02:25,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:02:25,675 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 175 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:25,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 104 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 17:02:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 412. [2022-01-31 17:02:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 370 states have (on average 1.3) internal successors, (481), 374 states have internal predecessors, (481), 17 states have call successors, (17), 6 states have call predecessors, (17), 24 states have return successors, (81), 31 states have call predecessors, (81), 15 states have call successors, (81) [2022-01-31 17:02:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 579 transitions. [2022-01-31 17:02:26,309 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 579 transitions. Word has length 57 [2022-01-31 17:02:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:26,309 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 579 transitions. [2022-01-31 17:02:26,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:02:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 579 transitions. [2022-01-31 17:02:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:02:26,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:26,311 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:26,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:02:26,311 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:26,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash -757950368, now seen corresponding path program 5 times [2022-01-31 17:02:26,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:26,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467676297] [2022-01-31 17:02:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:26,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:26,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:26,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:26,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:26,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:26,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:02:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:26,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:26,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467676297] [2022-01-31 17:02:26,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467676297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:26,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:26,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:02:26,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066877772] [2022-01-31 17:02:26,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:26,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:02:26,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:02:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:02:26,416 INFO L87 Difference]: Start difference. First operand 412 states and 579 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:27,733 INFO L93 Difference]: Finished difference Result 636 states and 867 transitions. [2022-01-31 17:02:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:02:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (4), 3 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 55 [2022-01-31 17:02:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:27,735 INFO L225 Difference]: With dead ends: 636 [2022-01-31 17:02:27,735 INFO L226 Difference]: Without dead ends: 415 [2022-01-31 17:02:27,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:02:27,736 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 130 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:27,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 119 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:02:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-31 17:02:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 371. [2022-01-31 17:02:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 330 states have (on average 1.303030303030303) internal successors, (430), 339 states have internal predecessors, (430), 17 states have call successors, (17), 6 states have call predecessors, (17), 23 states have return successors, (61), 25 states have call predecessors, (61), 15 states have call successors, (61) [2022-01-31 17:02:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 508 transitions. [2022-01-31 17:02:28,297 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 508 transitions. Word has length 55 [2022-01-31 17:02:28,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:28,297 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 508 transitions. [2022-01-31 17:02:28,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 508 transitions. [2022-01-31 17:02:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 17:02:28,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:28,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:28,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:02:28,298 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1838717898, now seen corresponding path program 1 times [2022-01-31 17:02:28,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:28,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369247993] [2022-01-31 17:02:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:28,299 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:28,299 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:28,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:28,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:02:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 17:02:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 17:02:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:28,659 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:28,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369247993] [2022-01-31 17:02:28,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [369247993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:28,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:28,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:02:28,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116686974] [2022-01-31 17:02:28,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:28,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:02:28,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:02:28,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:02:28,660 INFO L87 Difference]: Start difference. First operand 371 states and 508 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:02:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:30,324 INFO L93 Difference]: Finished difference Result 520 states and 711 transitions. [2022-01-31 17:02:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:02:30,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2022-01-31 17:02:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:30,326 INFO L225 Difference]: With dead ends: 520 [2022-01-31 17:02:30,326 INFO L226 Difference]: Without dead ends: 518 [2022-01-31 17:02:30,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:02:30,327 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 185 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:30,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 128 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-31 17:02:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 391. [2022-01-31 17:02:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 346 states have (on average 1.3034682080924855) internal successors, (451), 355 states have internal predecessors, (451), 20 states have call successors, (20), 7 states have call predecessors, (20), 24 states have return successors, (64), 28 states have call predecessors, (64), 18 states have call successors, (64) [2022-01-31 17:02:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 535 transitions. [2022-01-31 17:02:30,932 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 535 transitions. Word has length 58 [2022-01-31 17:02:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:30,932 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 535 transitions. [2022-01-31 17:02:30,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:02:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 535 transitions. [2022-01-31 17:02:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 17:02:30,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:30,934 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:30,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:02:30,934 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:30,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1337013587, now seen corresponding path program 7 times [2022-01-31 17:02:30,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:30,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970203780] [2022-01-31 17:02:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:30,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:30,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:30,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:30,937 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:31,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:31,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:02:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:31,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:31,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970203780] [2022-01-31 17:02:31,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970203780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:31,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:31,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:02:31,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470270201] [2022-01-31 17:02:31,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:31,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:02:31,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:02:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:02:31,519 INFO L87 Difference]: Start difference. First operand 391 states and 535 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:35,074 INFO L93 Difference]: Finished difference Result 729 states and 991 transitions. [2022-01-31 17:02:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:02:35,074 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-01-31 17:02:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:35,076 INFO L225 Difference]: With dead ends: 729 [2022-01-31 17:02:35,076 INFO L226 Difference]: Without dead ends: 577 [2022-01-31 17:02:35,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=2205, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:02:35,077 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 369 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3282 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:35,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 203 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3282 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:02:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-31 17:02:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 370. [2022-01-31 17:02:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 327 states have (on average 1.3027522935779816) internal successors, (426), 333 states have internal predecessors, (426), 21 states have call successors, (21), 7 states have call predecessors, (21), 21 states have return successors, (53), 29 states have call predecessors, (53), 19 states have call successors, (53) [2022-01-31 17:02:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 500 transitions. [2022-01-31 17:02:35,690 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 500 transitions. Word has length 56 [2022-01-31 17:02:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:35,690 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 500 transitions. [2022-01-31 17:02:35,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 500 transitions. [2022-01-31 17:02:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:02:35,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:35,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:35,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:02:35,691 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash -619155492, now seen corresponding path program 1 times [2022-01-31 17:02:35,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:35,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509596475] [2022-01-31 17:02:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:35,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:35,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:35,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:35,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:35,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:35,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:02:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:35,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:02:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:35,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 17:02:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:35,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:35,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509596475] [2022-01-31 17:02:35,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509596475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:35,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:35,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:02:35,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274749883] [2022-01-31 17:02:35,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:35,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:02:35,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:02:35,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:02:35,940 INFO L87 Difference]: Start difference. First operand 370 states and 500 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:02:38,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:38,067 INFO L93 Difference]: Finished difference Result 689 states and 945 transitions. [2022-01-31 17:02:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:02:38,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-01-31 17:02:38,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:38,069 INFO L225 Difference]: With dead ends: 689 [2022-01-31 17:02:38,069 INFO L226 Difference]: Without dead ends: 647 [2022-01-31 17:02:38,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:02:38,070 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 269 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:38,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 151 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-31 17:02:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 377. [2022-01-31 17:02:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 334 states have (on average 1.3053892215568863) internal successors, (436), 342 states have internal predecessors, (436), 21 states have call successors, (21), 7 states have call predecessors, (21), 21 states have return successors, (66), 27 states have call predecessors, (66), 19 states have call successors, (66) [2022-01-31 17:02:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 523 transitions. [2022-01-31 17:02:38,704 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 523 transitions. Word has length 59 [2022-01-31 17:02:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:38,704 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 523 transitions. [2022-01-31 17:02:38,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:02:38,704 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 523 transitions. [2022-01-31 17:02:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:02:38,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:38,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:38,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:02:38,706 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1484597758, now seen corresponding path program 2 times [2022-01-31 17:02:38,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:38,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847435502] [2022-01-31 17:02:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:38,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:38,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:38,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:38,709 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:02:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:38,842 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:38,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847435502] [2022-01-31 17:02:38,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847435502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:38,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:38,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:02:38,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237616233] [2022-01-31 17:02:38,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:38,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:02:38,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:38,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:02:38,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:02:38,843 INFO L87 Difference]: Start difference. First operand 377 states and 523 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:41,781 INFO L93 Difference]: Finished difference Result 829 states and 1133 transitions. [2022-01-31 17:02:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:02:41,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (4), 3 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 [2022-01-31 17:02:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:41,784 INFO L225 Difference]: With dead ends: 829 [2022-01-31 17:02:41,784 INFO L226 Difference]: Without dead ends: 820 [2022-01-31 17:02:41,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:02:41,784 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 386 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:41,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 199 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:02:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-01-31 17:02:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 383. [2022-01-31 17:02:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 340 states have (on average 1.3088235294117647) internal successors, (445), 348 states have internal predecessors, (445), 21 states have call successors, (21), 7 states have call predecessors, (21), 21 states have return successors, (66), 27 states have call predecessors, (66), 19 states have call successors, (66) [2022-01-31 17:02:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 532 transitions. [2022-01-31 17:02:42,441 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 532 transitions. Word has length 57 [2022-01-31 17:02:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:42,441 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 532 transitions. [2022-01-31 17:02:42,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 532 transitions. [2022-01-31 17:02:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:02:42,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:42,442 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:42,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:02:42,442 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash -138025090, now seen corresponding path program 6 times [2022-01-31 17:02:42,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:42,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816573593] [2022-01-31 17:02:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:42,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:42,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:42,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:42,445 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:42,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:42,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:02:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:42,799 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:42,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816573593] [2022-01-31 17:02:42,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [816573593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:42,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:42,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:02:42,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399564765] [2022-01-31 17:02:42,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:42,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:02:42,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:02:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:02:42,801 INFO L87 Difference]: Start difference. First operand 383 states and 532 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:44,788 INFO L93 Difference]: Finished difference Result 588 states and 823 transitions. [2022-01-31 17:02:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:02:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-01-31 17:02:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:44,790 INFO L225 Difference]: With dead ends: 588 [2022-01-31 17:02:44,790 INFO L226 Difference]: Without dead ends: 546 [2022-01-31 17:02:44,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:02:44,791 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 210 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:44,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 136 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:02:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-31 17:02:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 400. [2022-01-31 17:02:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 356 states have (on average 1.3117977528089888) internal successors, (467), 364 states have internal predecessors, (467), 21 states have call successors, (21), 7 states have call predecessors, (21), 22 states have return successors, (68), 28 states have call predecessors, (68), 19 states have call successors, (68) [2022-01-31 17:02:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 556 transitions. [2022-01-31 17:02:45,480 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 556 transitions. Word has length 57 [2022-01-31 17:02:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:45,480 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 556 transitions. [2022-01-31 17:02:45,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 556 transitions. [2022-01-31 17:02:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 17:02:45,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:45,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:45,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:02:45,481 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash 441395574, now seen corresponding path program 3 times [2022-01-31 17:02:45,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:45,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647431353] [2022-01-31 17:02:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:45,483 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:45,483 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:45,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:45,484 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:45,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:45,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:02:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:45,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:45,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647431353] [2022-01-31 17:02:45,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647431353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:45,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:45,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:02:45,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377224378] [2022-01-31 17:02:45,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:45,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:02:45,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:02:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:02:45,973 INFO L87 Difference]: Start difference. First operand 400 states and 556 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:02:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:48,098 INFO L93 Difference]: Finished difference Result 552 states and 760 transitions. [2022-01-31 17:02:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:02:48,098 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2022-01-31 17:02:48,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:48,100 INFO L225 Difference]: With dead ends: 552 [2022-01-31 17:02:48,100 INFO L226 Difference]: Without dead ends: 473 [2022-01-31 17:02:48,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:02:48,101 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 222 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:48,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 138 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:02:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-31 17:02:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 398. [2022-01-31 17:02:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 354 states have (on average 1.305084745762712) internal successors, (462), 362 states have internal predecessors, (462), 21 states have call successors, (21), 7 states have call predecessors, (21), 22 states have return successors, (68), 28 states have call predecessors, (68), 19 states have call successors, (68) [2022-01-31 17:02:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2022-01-31 17:02:48,795 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 60 [2022-01-31 17:02:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:48,795 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2022-01-31 17:02:48,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:02:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2022-01-31 17:02:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 17:02:48,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:48,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-01-31 17:02:48,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:02:48,797 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1769764882, now seen corresponding path program 7 times [2022-01-31 17:02:48,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144882010] [2022-01-31 17:02:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:48,798 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:48,798 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:48,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:48,800 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:48,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:48,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:02:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:49,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:49,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144882010] [2022-01-31 17:02:49,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [144882010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:49,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:49,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:02:49,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100344520] [2022-01-31 17:02:49,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:49,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:02:49,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:02:49,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:02:49,276 INFO L87 Difference]: Start difference. First operand 398 states and 551 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:54,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:54,942 INFO L93 Difference]: Finished difference Result 1077 states and 1504 transitions. [2022-01-31 17:02:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:02:54,942 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-01-31 17:02:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:54,945 INFO L225 Difference]: With dead ends: 1077 [2022-01-31 17:02:54,945 INFO L226 Difference]: Without dead ends: 996 [2022-01-31 17:02:54,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=483, Invalid=3939, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:02:54,946 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 555 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4851 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 5116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 4851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:54,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 245 Invalid, 5116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 4851 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 17:02:54,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-01-31 17:02:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 426. [2022-01-31 17:02:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 378 states have (on average 1.3253968253968254) internal successors, (501), 390 states have internal predecessors, (501), 21 states have call successors, (21), 7 states have call predecessors, (21), 26 states have return successors, (72), 28 states have call predecessors, (72), 19 states have call successors, (72) [2022-01-31 17:02:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 594 transitions. [2022-01-31 17:02:55,697 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 594 transitions. Word has length 60 [2022-01-31 17:02:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:55,697 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 594 transitions. [2022-01-31 17:02:55,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 594 transitions. [2022-01-31 17:02:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:02:55,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:55,698 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:55,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:02:55,698 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1714238120, now seen corresponding path program 1 times [2022-01-31 17:02:55,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:55,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702293978] [2022-01-31 17:02:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:55,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:55,700 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:55,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:55,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:55,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:55,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:02:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:55,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 17:02:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:55,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 17:02:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:55,730 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:55,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702293978] [2022-01-31 17:02:55,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [702293978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:55,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:55,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:02:55,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877140574] [2022-01-31 17:02:55,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:55,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:02:55,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:55,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:02:55,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:02:55,731 INFO L87 Difference]: Start difference. First operand 426 states and 594 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 17:02:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:56,557 INFO L93 Difference]: Finished difference Result 449 states and 621 transitions. [2022-01-31 17:02:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:02:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2022-01-31 17:02:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:56,559 INFO L225 Difference]: With dead ends: 449 [2022-01-31 17:02:56,559 INFO L226 Difference]: Without dead ends: 428 [2022-01-31 17:02:56,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:02:56,560 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:56,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 67 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-31 17:02:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 426. [2022-01-31 17:02:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 378 states have (on average 1.32010582010582) internal successors, (499), 390 states have internal predecessors, (499), 21 states have call successors, (21), 7 states have call predecessors, (21), 26 states have return successors, (72), 28 states have call predecessors, (72), 19 states have call successors, (72) [2022-01-31 17:02:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 592 transitions. [2022-01-31 17:02:57,315 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 592 transitions. Word has length 63 [2022-01-31 17:02:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:57,315 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 592 transitions. [2022-01-31 17:02:57,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 17:02:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 592 transitions. [2022-01-31 17:02:57,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:02:57,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:57,316 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:57,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:02:57,316 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:57,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash 316513507, now seen corresponding path program 8 times [2022-01-31 17:02:57,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:57,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352854578] [2022-01-31 17:02:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:57,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:57,318 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:57,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:57,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:57,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:57,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:02:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:57,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352854578] [2022-01-31 17:02:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1352854578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:57,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:57,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:02:57,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615117989] [2022-01-31 17:02:57,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:57,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:02:57,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:02:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:02:57,447 INFO L87 Difference]: Start difference. First operand 426 states and 592 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:59,388 INFO L93 Difference]: Finished difference Result 764 states and 1072 transitions. [2022-01-31 17:02:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:02:59,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (4), 3 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 61 [2022-01-31 17:02:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:59,390 INFO L225 Difference]: With dead ends: 764 [2022-01-31 17:02:59,390 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 17:02:59,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:02:59,391 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 176 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:59,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 118 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 17:03:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 449. [2022-01-31 17:03:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 398 states have (on average 1.314070351758794) internal successors, (523), 412 states have internal predecessors, (523), 24 states have call successors, (24), 7 states have call predecessors, (24), 26 states have return successors, (95), 29 states have call predecessors, (95), 22 states have call successors, (95) [2022-01-31 17:03:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 642 transitions. [2022-01-31 17:03:00,186 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 642 transitions. Word has length 61 [2022-01-31 17:03:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:00,186 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 642 transitions. [2022-01-31 17:03:00,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 642 transitions. [2022-01-31 17:03:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:03:00,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:00,188 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:00,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:03:00,188 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash -909267391, now seen corresponding path program 2 times [2022-01-31 17:03:00,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:00,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917754567] [2022-01-31 17:03:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:00,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:00,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:00,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:00,191 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:00,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:00,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:03:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:00,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917754567] [2022-01-31 17:03:00,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917754567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:00,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:00,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:03:00,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914119810] [2022-01-31 17:03:00,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:00,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:03:00,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:00,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:03:00,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:03:00,467 INFO L87 Difference]: Start difference. First operand 449 states and 642 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:03,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:03,113 INFO L93 Difference]: Finished difference Result 901 states and 1251 transitions. [2022-01-31 17:03:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:03:03,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-01-31 17:03:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:03,116 INFO L225 Difference]: With dead ends: 901 [2022-01-31 17:03:03,116 INFO L226 Difference]: Without dead ends: 756 [2022-01-31 17:03:03,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:03:03,117 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 336 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:03,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 181 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:03:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-01-31 17:03:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 455. [2022-01-31 17:03:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 402 states have (on average 1.3134328358208955) internal successors, (528), 418 states have internal predecessors, (528), 25 states have call successors, (25), 7 states have call predecessors, (25), 27 states have return successors, (103), 29 states have call predecessors, (103), 23 states have call successors, (103) [2022-01-31 17:03:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 656 transitions. [2022-01-31 17:03:03,956 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 656 transitions. Word has length 61 [2022-01-31 17:03:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:03,956 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 656 transitions. [2022-01-31 17:03:03,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 656 transitions. [2022-01-31 17:03:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:03:03,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:03,958 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:03,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:03:03,958 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1148263334, now seen corresponding path program 1 times [2022-01-31 17:03:03,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:03,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169452676] [2022-01-31 17:03:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:03,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:03,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:03,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:03,961 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:04,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:04,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:03:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:04,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 17:03:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:04,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 17:03:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:04,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:04,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169452676] [2022-01-31 17:03:04,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1169452676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:04,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:04,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:03:04,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263551711] [2022-01-31 17:03:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:04,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:03:04,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:04,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:03:04,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:03:04,209 INFO L87 Difference]: Start difference. First operand 455 states and 656 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:03:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:07,268 INFO L93 Difference]: Finished difference Result 957 states and 1349 transitions. [2022-01-31 17:03:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:03:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2022-01-31 17:03:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:07,271 INFO L225 Difference]: With dead ends: 957 [2022-01-31 17:03:07,271 INFO L226 Difference]: Without dead ends: 919 [2022-01-31 17:03:07,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:03:07,272 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 312 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:07,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 167 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:03:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-01-31 17:03:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 469. [2022-01-31 17:03:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 414 states have (on average 1.3140096618357489) internal successors, (544), 432 states have internal predecessors, (544), 27 states have call successors, (27), 7 states have call predecessors, (27), 27 states have return successors, (134), 29 states have call predecessors, (134), 25 states have call successors, (134) [2022-01-31 17:03:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 705 transitions. [2022-01-31 17:03:08,118 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 705 transitions. Word has length 63 [2022-01-31 17:03:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:08,118 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 705 transitions. [2022-01-31 17:03:08,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:03:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 705 transitions. [2022-01-31 17:03:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:03:08,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:08,120 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:08,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:03:08,120 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1161648214, now seen corresponding path program 2 times [2022-01-31 17:03:08,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:08,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777862842] [2022-01-31 17:03:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:08,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:08,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:08,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:08,123 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:08,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:08,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:03:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:08,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:03:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:08,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 17:03:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:08,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 17:03:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:03:08,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:08,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777862842] [2022-01-31 17:03:08,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777862842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:08,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:08,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:03:08,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882185518] [2022-01-31 17:03:08,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:08,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:03:08,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:08,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:03:08,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:03:08,238 INFO L87 Difference]: Start difference. First operand 469 states and 705 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 17:03:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:09,751 INFO L93 Difference]: Finished difference Result 568 states and 832 transitions. [2022-01-31 17:03:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:03:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 65 [2022-01-31 17:03:09,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:09,754 INFO L225 Difference]: With dead ends: 568 [2022-01-31 17:03:09,754 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 17:03:09,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:03:09,755 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 162 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:09,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 100 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:03:09,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 17:03:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 514. [2022-01-31 17:03:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 450 states have (on average 1.3022222222222222) internal successors, (586), 467 states have internal predecessors, (586), 36 states have call successors, (36), 7 states have call predecessors, (36), 27 states have return successors, (143), 39 states have call predecessors, (143), 34 states have call successors, (143) [2022-01-31 17:03:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 765 transitions. [2022-01-31 17:03:10,747 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 765 transitions. Word has length 65 [2022-01-31 17:03:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:10,747 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 765 transitions. [2022-01-31 17:03:10,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 17:03:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 765 transitions. [2022-01-31 17:03:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 17:03:10,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:10,749 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1] [2022-01-31 17:03:10,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:03:10,749 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:10,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1889062064, now seen corresponding path program 8 times [2022-01-31 17:03:10,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:10,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879227600] [2022-01-31 17:03:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:10,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:10,751 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:10,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:10,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:03:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:11,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:11,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879227600] [2022-01-31 17:03:11,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [879227600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:11,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:11,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:03:11,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558507825] [2022-01-31 17:03:11,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:11,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:03:11,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:11,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:03:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:03:11,443 INFO L87 Difference]: Start difference. First operand 514 states and 765 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:18,687 INFO L93 Difference]: Finished difference Result 1284 states and 1791 transitions. [2022-01-31 17:03:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:03:18,688 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-01-31 17:03:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:18,692 INFO L225 Difference]: With dead ends: 1284 [2022-01-31 17:03:18,692 INFO L226 Difference]: Without dead ends: 1248 [2022-01-31 17:03:18,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=475, Invalid=4927, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:03:18,693 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 638 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6038 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 6338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 6038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:18,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 315 Invalid, 6338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 6038 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 17:03:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-01-31 17:03:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 502. [2022-01-31 17:03:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 438 states have (on average 1.3082191780821917) internal successors, (573), 456 states have internal predecessors, (573), 36 states have call successors, (36), 7 states have call predecessors, (36), 27 states have return successors, (141), 38 states have call predecessors, (141), 34 states have call successors, (141) [2022-01-31 17:03:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 750 transitions. [2022-01-31 17:03:19,717 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 750 transitions. Word has length 62 [2022-01-31 17:03:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:19,718 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 750 transitions. [2022-01-31 17:03:19,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 750 transitions. [2022-01-31 17:03:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 17:03:19,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:19,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:19,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:03:19,720 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:19,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:19,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1739803582, now seen corresponding path program 3 times [2022-01-31 17:03:19,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:19,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442895715] [2022-01-31 17:03:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:19,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:19,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:19,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:19,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:03:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 17:03:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 17:03:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 17:03:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:03:19,832 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:19,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442895715] [2022-01-31 17:03:19,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1442895715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:19,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:19,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:03:19,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765650375] [2022-01-31 17:03:19,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:19,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:03:19,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:19,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:03:19,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:03:19,833 INFO L87 Difference]: Start difference. First operand 502 states and 750 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:03:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:21,364 INFO L93 Difference]: Finished difference Result 587 states and 861 transitions. [2022-01-31 17:03:21,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:03:21,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-01-31 17:03:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:21,367 INFO L225 Difference]: With dead ends: 587 [2022-01-31 17:03:21,367 INFO L226 Difference]: Without dead ends: 550 [2022-01-31 17:03:21,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:03:21,368 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 89 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:21,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 91 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-01-31 17:03:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 511. [2022-01-31 17:03:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 445 states have (on average 1.3056179775280898) internal successors, (581), 463 states have internal predecessors, (581), 38 states have call successors, (38), 7 states have call predecessors, (38), 27 states have return successors, (143), 40 states have call predecessors, (143), 36 states have call successors, (143) [2022-01-31 17:03:22,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 762 transitions. [2022-01-31 17:03:22,419 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 762 transitions. Word has length 66 [2022-01-31 17:03:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:22,420 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 762 transitions. [2022-01-31 17:03:22,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:03:22,420 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 762 transitions. [2022-01-31 17:03:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:03:22,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:22,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:22,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:03:22,422 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1261134463, now seen corresponding path program 9 times [2022-01-31 17:03:22,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:22,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292015851] [2022-01-31 17:03:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:22,423 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:22,423 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:22,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:22,425 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:22,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:22,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:03:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:22,890 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292015851] [2022-01-31 17:03:22,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [292015851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:22,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:22,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:03:22,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946380652] [2022-01-31 17:03:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:22,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:03:22,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:03:22,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:03:22,891 INFO L87 Difference]: Start difference. First operand 511 states and 762 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:25,600 INFO L93 Difference]: Finished difference Result 736 states and 1071 transitions. [2022-01-31 17:03:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:03:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-01-31 17:03:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:25,603 INFO L225 Difference]: With dead ends: 736 [2022-01-31 17:03:25,603 INFO L226 Difference]: Without dead ends: 628 [2022-01-31 17:03:25,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:03:25,604 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 237 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:25,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 138 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:03:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-31 17:03:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 518. [2022-01-31 17:03:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 452 states have (on average 1.3008849557522124) internal successors, (588), 469 states have internal predecessors, (588), 38 states have call successors, (38), 7 states have call predecessors, (38), 27 states have return successors, (143), 41 states have call predecessors, (143), 36 states have call successors, (143) [2022-01-31 17:03:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 769 transitions. [2022-01-31 17:03:26,674 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 769 transitions. Word has length 63 [2022-01-31 17:03:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:26,674 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 769 transitions. [2022-01-31 17:03:26,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 769 transitions. [2022-01-31 17:03:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:03:26,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:26,676 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:26,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:03:26,677 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash 763760179, now seen corresponding path program 10 times [2022-01-31 17:03:26,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:26,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724939678] [2022-01-31 17:03:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:26,678 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:26,678 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:26,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:26,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:26,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:26,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:03:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:27,079 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:27,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724939678] [2022-01-31 17:03:27,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1724939678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:27,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:27,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:03:27,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104382762] [2022-01-31 17:03:27,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:27,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:03:27,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:27,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:03:27,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:03:27,080 INFO L87 Difference]: Start difference. First operand 518 states and 769 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:29,115 INFO L93 Difference]: Finished difference Result 772 states and 1138 transitions. [2022-01-31 17:03:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:03:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-01-31 17:03:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:29,118 INFO L225 Difference]: With dead ends: 772 [2022-01-31 17:03:29,118 INFO L226 Difference]: Without dead ends: 667 [2022-01-31 17:03:29,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:03:29,119 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 155 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:29,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 99 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:03:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-31 17:03:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 518. [2022-01-31 17:03:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 452 states have (on average 1.2876106194690264) internal successors, (582), 469 states have internal predecessors, (582), 38 states have call successors, (38), 7 states have call predecessors, (38), 27 states have return successors, (143), 41 states have call predecessors, (143), 36 states have call successors, (143) [2022-01-31 17:03:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 763 transitions. [2022-01-31 17:03:30,186 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 763 transitions. Word has length 63 [2022-01-31 17:03:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:30,186 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 763 transitions. [2022-01-31 17:03:30,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 763 transitions. [2022-01-31 17:03:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:03:30,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:30,188 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:30,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:03:30,188 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash 186529527, now seen corresponding path program 11 times [2022-01-31 17:03:30,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:30,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912226581] [2022-01-31 17:03:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:30,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:30,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:30,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:30,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:30,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:30,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:03:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:30,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:30,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912226581] [2022-01-31 17:03:30,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [912226581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:30,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:30,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:03:30,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622177161] [2022-01-31 17:03:30,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:30,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:03:30,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:30,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:03:30,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:03:30,657 INFO L87 Difference]: Start difference. First operand 518 states and 763 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:33,414 INFO L93 Difference]: Finished difference Result 735 states and 1080 transitions. [2022-01-31 17:03:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:03:33,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-01-31 17:03:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:33,416 INFO L225 Difference]: With dead ends: 735 [2022-01-31 17:03:33,416 INFO L226 Difference]: Without dead ends: 640 [2022-01-31 17:03:33,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:03:33,418 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 239 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:33,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 171 Invalid, 2547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:03:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-31 17:03:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 523. [2022-01-31 17:03:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 457 states have (on average 1.2822757111597374) internal successors, (586), 473 states have internal predecessors, (586), 38 states have call successors, (38), 7 states have call predecessors, (38), 27 states have return successors, (143), 42 states have call predecessors, (143), 36 states have call successors, (143) [2022-01-31 17:03:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 767 transitions. [2022-01-31 17:03:34,498 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 767 transitions. Word has length 63 [2022-01-31 17:03:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:34,498 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 767 transitions. [2022-01-31 17:03:34,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 767 transitions. [2022-01-31 17:03:34,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:03:34,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:34,500 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:34,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:03:34,500 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1627925627, now seen corresponding path program 12 times [2022-01-31 17:03:34,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:34,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93784921] [2022-01-31 17:03:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:34,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:34,502 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:34,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:34,504 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:34,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:34,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:03:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:34,987 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:34,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93784921] [2022-01-31 17:03:34,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [93784921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:34,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:34,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:03:34,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130083892] [2022-01-31 17:03:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:34,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:03:34,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:34,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:03:34,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:03:34,988 INFO L87 Difference]: Start difference. First operand 523 states and 767 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:37,635 INFO L93 Difference]: Finished difference Result 750 states and 1086 transitions. [2022-01-31 17:03:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:03:37,635 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-01-31 17:03:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:37,638 INFO L225 Difference]: With dead ends: 750 [2022-01-31 17:03:37,638 INFO L226 Difference]: Without dead ends: 652 [2022-01-31 17:03:37,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:03:37,639 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 285 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:37,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 147 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:03:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-31 17:03:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 530. [2022-01-31 17:03:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 464 states have (on average 1.2780172413793103) internal successors, (593), 479 states have internal predecessors, (593), 38 states have call successors, (38), 7 states have call predecessors, (38), 27 states have return successors, (143), 43 states have call predecessors, (143), 36 states have call successors, (143) [2022-01-31 17:03:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 774 transitions. [2022-01-31 17:03:38,741 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 774 transitions. Word has length 63 [2022-01-31 17:03:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:38,742 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 774 transitions. [2022-01-31 17:03:38,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 774 transitions. [2022-01-31 17:03:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:03:38,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:38,744 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:38,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:03:38,744 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash 954859841, now seen corresponding path program 13 times [2022-01-31 17:03:38,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:38,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067067019] [2022-01-31 17:03:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:38,745 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:38,745 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:38,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:38,747 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:03:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:39,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:39,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067067019] [2022-01-31 17:03:39,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067067019] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:39,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:39,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:03:39,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284656181] [2022-01-31 17:03:39,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:39,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:03:39,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:03:39,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:03:39,233 INFO L87 Difference]: Start difference. First operand 530 states and 774 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:41,780 INFO L93 Difference]: Finished difference Result 686 states and 992 transitions. [2022-01-31 17:03:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:03:41,780 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-01-31 17:03:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:41,782 INFO L225 Difference]: With dead ends: 686 [2022-01-31 17:03:41,782 INFO L226 Difference]: Without dead ends: 649 [2022-01-31 17:03:41,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:03:41,783 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 277 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:41,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 142 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:03:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-31 17:03:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 530. [2022-01-31 17:03:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 464 states have (on average 1.2780172413793103) internal successors, (593), 479 states have internal predecessors, (593), 38 states have call successors, (38), 7 states have call predecessors, (38), 27 states have return successors, (143), 43 states have call predecessors, (143), 36 states have call successors, (143) [2022-01-31 17:03:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 774 transitions. [2022-01-31 17:03:42,887 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 774 transitions. Word has length 63 [2022-01-31 17:03:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:42,887 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 774 transitions. [2022-01-31 17:03:42,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 774 transitions. [2022-01-31 17:03:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:03:42,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:42,889 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:42,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:03:42,890 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1102308792, now seen corresponding path program 2 times [2022-01-31 17:03:42,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:42,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527429560] [2022-01-31 17:03:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:42,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:42,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:42,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:42,893 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:43,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:43,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:03:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:03:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:43,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 17:03:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:43,151 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:43,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527429560] [2022-01-31 17:03:43,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [527429560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:43,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:43,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:03:43,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705824214] [2022-01-31 17:03:43,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:43,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:03:43,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:43,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:03:43,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:03:43,152 INFO L87 Difference]: Start difference. First operand 530 states and 774 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:03:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:47,309 INFO L93 Difference]: Finished difference Result 1220 states and 1701 transitions. [2022-01-31 17:03:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:03:47,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 65 [2022-01-31 17:03:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:47,313 INFO L225 Difference]: With dead ends: 1220 [2022-01-31 17:03:47,313 INFO L226 Difference]: Without dead ends: 1174 [2022-01-31 17:03:47,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:03:47,314 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 331 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2627 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:47,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 229 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2627 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:03:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-01-31 17:03:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 553. [2022-01-31 17:03:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 482 states have (on average 1.2800829875518671) internal successors, (617), 498 states have internal predecessors, (617), 43 states have call successors, (43), 7 states have call predecessors, (43), 27 states have return successors, (185), 47 states have call predecessors, (185), 41 states have call successors, (185) [2022-01-31 17:03:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 845 transitions. [2022-01-31 17:03:48,472 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 845 transitions. Word has length 65 [2022-01-31 17:03:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:48,473 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 845 transitions. [2022-01-31 17:03:48,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:03:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 845 transitions. [2022-01-31 17:03:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:03:48,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:48,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:48,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:03:48,476 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash 284660342, now seen corresponding path program 2 times [2022-01-31 17:03:48,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552623204] [2022-01-31 17:03:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:48,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:48,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:48,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:48,478 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:48,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:48,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:03:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:48,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:03:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:48,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 17:03:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:48,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:48,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552623204] [2022-01-31 17:03:48,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552623204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:48,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:48,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:03:48,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075599260] [2022-01-31 17:03:48,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:48,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:03:48,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:03:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:03:48,710 INFO L87 Difference]: Start difference. First operand 553 states and 845 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:03:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:54,078 INFO L93 Difference]: Finished difference Result 1355 states and 1889 transitions. [2022-01-31 17:03:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:03:54,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 65 [2022-01-31 17:03:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:54,081 INFO L225 Difference]: With dead ends: 1355 [2022-01-31 17:03:54,081 INFO L226 Difference]: Without dead ends: 1300 [2022-01-31 17:03:54,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:03:54,082 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 498 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3227 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 3227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:54,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 293 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 3227 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:03:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-01-31 17:03:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 566. [2022-01-31 17:03:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 491 states have (on average 1.274949083503055) internal successors, (626), 505 states have internal predecessors, (626), 47 states have call successors, (47), 7 states have call predecessors, (47), 27 states have return successors, (196), 53 states have call predecessors, (196), 45 states have call successors, (196) [2022-01-31 17:03:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 869 transitions. [2022-01-31 17:03:55,309 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 869 transitions. Word has length 65 [2022-01-31 17:03:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:55,309 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 869 transitions. [2022-01-31 17:03:55,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 17:03:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 869 transitions. [2022-01-31 17:03:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:03:55,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:55,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:55,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:03:55,312 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:55,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:55,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1218661776, now seen corresponding path program 1 times [2022-01-31 17:03:55,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:55,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619325981] [2022-01-31 17:03:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:55,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:55,314 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:55,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:55,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:03:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 17:03:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 17:03:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 17:03:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:03:55,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:55,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619325981] [2022-01-31 17:03:55,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [619325981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:55,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:55,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:03:55,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236925679] [2022-01-31 17:03:55,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:55,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:03:55,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:03:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:03:55,528 INFO L87 Difference]: Start difference. First operand 566 states and 869 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:03:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:57,344 INFO L93 Difference]: Finished difference Result 677 states and 1009 transitions. [2022-01-31 17:03:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:03:57,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2022-01-31 17:03:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:57,346 INFO L225 Difference]: With dead ends: 677 [2022-01-31 17:03:57,346 INFO L226 Difference]: Without dead ends: 572 [2022-01-31 17:03:57,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:03:57,350 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 181 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:57,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 120 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:03:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-31 17:03:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 532. [2022-01-31 17:03:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 468 states have (on average 1.2713675213675213) internal successors, (595), 478 states have internal predecessors, (595), 38 states have call successors, (38), 7 states have call predecessors, (38), 25 states have return successors, (128), 46 states have call predecessors, (128), 36 states have call successors, (128) [2022-01-31 17:03:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 761 transitions. [2022-01-31 17:03:58,501 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 761 transitions. Word has length 67 [2022-01-31 17:03:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:58,501 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 761 transitions. [2022-01-31 17:03:58,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:03:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 761 transitions. [2022-01-31 17:03:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 17:03:58,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:58,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:58,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:03:58,503 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:58,503 INFO L85 PathProgramCache]: Analyzing trace with hash -993097288, now seen corresponding path program 1 times [2022-01-31 17:03:58,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:58,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736268830] [2022-01-31 17:03:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:58,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:58,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:58,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:58,506 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:58,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:58,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:03:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:58,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:03:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:58,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 17:03:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:58,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 17:03:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:03:58,643 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:58,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736268830] [2022-01-31 17:03:58,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [736268830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:58,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:58,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:03:58,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865834907] [2022-01-31 17:03:58,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:58,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:03:58,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:58,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:03:58,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:03:58,644 INFO L87 Difference]: Start difference. First operand 532 states and 761 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:04:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:00,981 INFO L93 Difference]: Finished difference Result 698 states and 975 transitions. [2022-01-31 17:04:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:04:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 68 [2022-01-31 17:04:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:00,983 INFO L225 Difference]: With dead ends: 698 [2022-01-31 17:04:00,983 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 17:04:00,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:04:00,984 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 281 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:00,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 108 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:04:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 17:04:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 496. [2022-01-31 17:04:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 441 states have (on average 1.2675736961451247) internal successors, (559), 452 states have internal predecessors, (559), 29 states have call successors, (29), 7 states have call predecessors, (29), 25 states have return successors, (83), 36 states have call predecessors, (83), 27 states have call successors, (83) [2022-01-31 17:04:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 671 transitions. [2022-01-31 17:04:02,086 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 671 transitions. Word has length 68 [2022-01-31 17:04:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:02,086 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 671 transitions. [2022-01-31 17:04:02,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:04:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 671 transitions. [2022-01-31 17:04:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 17:04:02,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:02,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:02,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:04:02,087 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash 393106106, now seen corresponding path program 2 times [2022-01-31 17:04:02,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:02,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072730512] [2022-01-31 17:04:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:02,089 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:02,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:02,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:02,090 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:02,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:02,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:04:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:02,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:04:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:02,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 17:04:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:02,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 17:04:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:04:02,273 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:02,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072730512] [2022-01-31 17:04:02,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072730512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:02,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:02,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:04:02,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776277291] [2022-01-31 17:04:02,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:02,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:04:02,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:02,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:04:02,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:04:02,274 INFO L87 Difference]: Start difference. First operand 496 states and 671 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:04:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:04,524 INFO L93 Difference]: Finished difference Result 637 states and 866 transitions. [2022-01-31 17:04:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:04:04,524 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 68 [2022-01-31 17:04:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:04,526 INFO L225 Difference]: With dead ends: 637 [2022-01-31 17:04:04,526 INFO L226 Difference]: Without dead ends: 572 [2022-01-31 17:04:04,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:04:04,527 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 206 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:04,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 155 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:04:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-31 17:04:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 496. [2022-01-31 17:04:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 441 states have (on average 1.2607709750566893) internal successors, (556), 452 states have internal predecessors, (556), 29 states have call successors, (29), 7 states have call predecessors, (29), 25 states have return successors, (83), 36 states have call predecessors, (83), 27 states have call successors, (83) [2022-01-31 17:04:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 668 transitions. [2022-01-31 17:04:05,622 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 668 transitions. Word has length 68 [2022-01-31 17:04:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:05,622 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 668 transitions. [2022-01-31 17:04:05,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:04:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 668 transitions. [2022-01-31 17:04:05,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 17:04:05,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:05,624 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:05,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:04:05,624 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:05,624 INFO L85 PathProgramCache]: Analyzing trace with hash 584053852, now seen corresponding path program 3 times [2022-01-31 17:04:05,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:05,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801830000] [2022-01-31 17:04:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:05,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:05,626 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:05,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:05,627 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:05,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:05,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:04:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:05,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 17:04:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:05,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 17:04:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 17:04:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:04:05,950 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801830000] [2022-01-31 17:04:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [801830000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:05,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:05,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:04:05,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478210507] [2022-01-31 17:04:05,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:05,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:04:05,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:04:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:04:05,951 INFO L87 Difference]: Start difference. First operand 496 states and 668 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 17:04:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:09,299 INFO L93 Difference]: Finished difference Result 717 states and 953 transitions. [2022-01-31 17:04:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:04:09,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 70 [2022-01-31 17:04:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:09,302 INFO L225 Difference]: With dead ends: 717 [2022-01-31 17:04:09,302 INFO L226 Difference]: Without dead ends: 655 [2022-01-31 17:04:09,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:04:09,303 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 335 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:09,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 176 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:04:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-31 17:04:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 496. [2022-01-31 17:04:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 441 states have (on average 1.2607709750566893) internal successors, (556), 452 states have internal predecessors, (556), 29 states have call successors, (29), 7 states have call predecessors, (29), 25 states have return successors, (77), 36 states have call predecessors, (77), 27 states have call successors, (77) [2022-01-31 17:04:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 662 transitions. [2022-01-31 17:04:10,415 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 662 transitions. Word has length 70 [2022-01-31 17:04:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:10,415 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 662 transitions. [2022-01-31 17:04:10,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 17:04:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 662 transitions. [2022-01-31 17:04:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:04:10,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:10,416 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:10,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:04:10,417 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1852561872, now seen corresponding path program 4 times [2022-01-31 17:04:10,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:10,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435420588] [2022-01-31 17:04:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:10,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:10,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:10,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:10,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:10,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:10,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:04:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:10,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:10,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435420588] [2022-01-31 17:04:10,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [435420588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:10,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:10,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:04:10,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223961784] [2022-01-31 17:04:10,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:10,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:04:10,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:10,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:04:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:04:10,595 INFO L87 Difference]: Start difference. First operand 496 states and 662 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:15,119 INFO L93 Difference]: Finished difference Result 1045 states and 1367 transitions. [2022-01-31 17:04:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:04:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (4), 3 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 67 [2022-01-31 17:04:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:15,122 INFO L225 Difference]: With dead ends: 1045 [2022-01-31 17:04:15,122 INFO L226 Difference]: Without dead ends: 1036 [2022-01-31 17:04:15,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:04:15,123 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 386 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:15,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 219 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:04:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-01-31 17:04:16,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 502. [2022-01-31 17:04:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 447 states have (on average 1.2639821029082774) internal successors, (565), 458 states have internal predecessors, (565), 29 states have call successors, (29), 7 states have call predecessors, (29), 25 states have return successors, (77), 36 states have call predecessors, (77), 27 states have call successors, (77) [2022-01-31 17:04:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 671 transitions. [2022-01-31 17:04:16,250 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 671 transitions. Word has length 67 [2022-01-31 17:04:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:16,250 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 671 transitions. [2022-01-31 17:04:16,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 671 transitions. [2022-01-31 17:04:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:04:16,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:16,252 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:16,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:04:16,252 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2096741826, now seen corresponding path program 9 times [2022-01-31 17:04:16,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:16,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464463066] [2022-01-31 17:04:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:16,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:16,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:16,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:16,255 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:16,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:16,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:04:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:16,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:16,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464463066] [2022-01-31 17:04:16,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [464463066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:16,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:16,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:04:16,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12060716] [2022-01-31 17:04:16,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:16,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:04:16,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:04:16,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:04:16,687 INFO L87 Difference]: Start difference. First operand 502 states and 671 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:19,496 INFO L93 Difference]: Finished difference Result 711 states and 961 transitions. [2022-01-31 17:04:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:04:19,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-01-31 17:04:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:19,498 INFO L225 Difference]: With dead ends: 711 [2022-01-31 17:04:19,498 INFO L226 Difference]: Without dead ends: 669 [2022-01-31 17:04:19,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:04:19,499 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 242 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:19,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 160 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:04:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-31 17:04:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 522. [2022-01-31 17:04:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 466 states have (on average 1.2660944206008584) internal successors, (590), 477 states have internal predecessors, (590), 29 states have call successors, (29), 7 states have call predecessors, (29), 26 states have return successors, (78), 37 states have call predecessors, (78), 27 states have call successors, (78) [2022-01-31 17:04:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 697 transitions. [2022-01-31 17:04:20,681 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 697 transitions. Word has length 67 [2022-01-31 17:04:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:20,681 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 697 transitions. [2022-01-31 17:04:20,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 697 transitions. [2022-01-31 17:04:20,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 17:04:20,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:20,682 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:20,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:04:20,682 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:20,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2041211885, now seen corresponding path program 3 times [2022-01-31 17:04:20,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:20,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364757208] [2022-01-31 17:04:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:20,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:20,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:20,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:20,685 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:20,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:20,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:04:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:20,826 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:20,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364757208] [2022-01-31 17:04:20,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1364757208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:20,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:20,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:04:20,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777395068] [2022-01-31 17:04:20,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:20,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:04:20,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:20,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:04:20,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:04:20,827 INFO L87 Difference]: Start difference. First operand 522 states and 697 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:04:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:22,609 INFO L93 Difference]: Finished difference Result 550 states and 734 transitions. [2022-01-31 17:04:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:04:22,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 68 [2022-01-31 17:04:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:22,610 INFO L225 Difference]: With dead ends: 550 [2022-01-31 17:04:22,610 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 17:04:22,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:04:22,611 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 102 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:22,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 147 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:04:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 17:04:23,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 531. [2022-01-31 17:04:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 475 states have (on average 1.2673684210526315) internal successors, (602), 486 states have internal predecessors, (602), 29 states have call successors, (29), 7 states have call predecessors, (29), 26 states have return successors, (78), 37 states have call predecessors, (78), 27 states have call successors, (78) [2022-01-31 17:04:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 709 transitions. [2022-01-31 17:04:23,813 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 709 transitions. Word has length 68 [2022-01-31 17:04:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:23,813 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 709 transitions. [2022-01-31 17:04:23,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:04:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 709 transitions. [2022-01-31 17:04:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 17:04:23,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:23,814 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:23,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:04:23,815 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:23,815 INFO L85 PathProgramCache]: Analyzing trace with hash -598755970, now seen corresponding path program 4 times [2022-01-31 17:04:23,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:23,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294191057] [2022-01-31 17:04:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:23,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:23,816 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:23,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:23,821 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:24,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:04:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:24,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 17:04:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:24,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 17:04:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:24,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 17:04:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:04:24,274 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:24,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294191057] [2022-01-31 17:04:24,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [294191057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:24,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:24,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:04:24,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909917110] [2022-01-31 17:04:24,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:24,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:04:24,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:24,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:04:24,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:04:24,275 INFO L87 Difference]: Start difference. First operand 531 states and 709 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:04:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:27,502 INFO L93 Difference]: Finished difference Result 708 states and 934 transitions. [2022-01-31 17:04:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:04:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 72 [2022-01-31 17:04:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:27,504 INFO L225 Difference]: With dead ends: 708 [2022-01-31 17:04:27,504 INFO L226 Difference]: Without dead ends: 650 [2022-01-31 17:04:27,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:04:27,505 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 280 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:27,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 176 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:04:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-31 17:04:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 531. [2022-01-31 17:04:28,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 475 states have (on average 1.2673684210526315) internal successors, (602), 486 states have internal predecessors, (602), 29 states have call successors, (29), 7 states have call predecessors, (29), 26 states have return successors, (76), 37 states have call predecessors, (76), 27 states have call successors, (76) [2022-01-31 17:04:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 707 transitions. [2022-01-31 17:04:28,709 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 707 transitions. Word has length 72 [2022-01-31 17:04:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:28,709 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 707 transitions. [2022-01-31 17:04:28,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:04:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 707 transitions. [2022-01-31 17:04:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:04:28,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:28,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:28,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:04:28,710 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:28,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1014258416, now seen corresponding path program 5 times [2022-01-31 17:04:28,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:28,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810272521] [2022-01-31 17:04:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:28,711 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:28,711 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:28,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:28,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:28,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:28,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:04:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:29,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 17:04:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:29,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 17:04:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 17:04:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 17:04:29,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:29,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810272521] [2022-01-31 17:04:29,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [810272521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:29,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:29,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:04:29,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412982765] [2022-01-31 17:04:29,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:29,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:04:29,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:29,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:04:29,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:04:29,055 INFO L87 Difference]: Start difference. First operand 531 states and 707 transitions. Second operand has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:04:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:31,433 INFO L93 Difference]: Finished difference Result 706 states and 946 transitions. [2022-01-31 17:04:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:04:31,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 73 [2022-01-31 17:04:31,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:31,434 INFO L225 Difference]: With dead ends: 706 [2022-01-31 17:04:31,434 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 17:04:31,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:04:31,435 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 150 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:31,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 131 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:04:31,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 17:04:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 562. [2022-01-31 17:04:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 498 states have (on average 1.2550200803212852) internal successors, (625), 511 states have internal predecessors, (625), 33 states have call successors, (33), 7 states have call predecessors, (33), 30 states have return successors, (96), 43 states have call predecessors, (96), 31 states have call successors, (96) [2022-01-31 17:04:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 754 transitions. [2022-01-31 17:04:32,762 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 754 transitions. Word has length 73 [2022-01-31 17:04:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:32,763 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 754 transitions. [2022-01-31 17:04:32,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:04:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 754 transitions. [2022-01-31 17:04:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 17:04:32,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:32,764 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:32,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:04:32,764 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:32,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2139034904, now seen corresponding path program 5 times [2022-01-31 17:04:32,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:32,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874343244] [2022-01-31 17:04:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:32,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:32,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:32,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:32,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:32,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:32,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:04:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:32,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:32,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874343244] [2022-01-31 17:04:32,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [874343244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:32,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:32,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:04:32,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315047790] [2022-01-31 17:04:32,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:32,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:04:32,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:04:32,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:04:32,922 INFO L87 Difference]: Start difference. First operand 562 states and 754 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:36,805 INFO L93 Difference]: Finished difference Result 1163 states and 1562 transitions. [2022-01-31 17:04:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:04:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (4), 3 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 70 [2022-01-31 17:04:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:36,810 INFO L225 Difference]: With dead ends: 1163 [2022-01-31 17:04:36,810 INFO L226 Difference]: Without dead ends: 876 [2022-01-31 17:04:36,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:04:36,811 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 207 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:36,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 152 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:04:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-31 17:04:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 587. [2022-01-31 17:04:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 521 states have (on average 1.251439539347409) internal successors, (652), 535 states have internal predecessors, (652), 35 states have call successors, (35), 7 states have call predecessors, (35), 30 states have return successors, (118), 44 states have call predecessors, (118), 33 states have call successors, (118) [2022-01-31 17:04:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 805 transitions. [2022-01-31 17:04:38,202 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 805 transitions. Word has length 70 [2022-01-31 17:04:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:38,202 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 805 transitions. [2022-01-31 17:04:38,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 805 transitions. [2022-01-31 17:04:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 17:04:38,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:38,204 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1] [2022-01-31 17:04:38,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:04:38,204 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1093160262, now seen corresponding path program 10 times [2022-01-31 17:04:38,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171887457] [2022-01-31 17:04:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:38,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:38,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:38,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:38,207 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:38,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:38,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:04:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:39,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:39,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171887457] [2022-01-31 17:04:39,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [171887457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:39,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:39,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:04:39,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306496688] [2022-01-31 17:04:39,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:39,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:04:39,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:04:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:04:39,027 INFO L87 Difference]: Start difference. First operand 587 states and 805 transitions. Second operand has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:47,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:47,260 INFO L93 Difference]: Finished difference Result 1339 states and 1831 transitions. [2022-01-31 17:04:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:04:47,261 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-01-31 17:04:47,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:47,265 INFO L225 Difference]: With dead ends: 1339 [2022-01-31 17:04:47,265 INFO L226 Difference]: Without dead ends: 1316 [2022-01-31 17:04:47,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=347, Invalid=4483, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:04:47,267 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 579 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6749 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 7013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 6749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:47,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 307 Invalid, 7013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 6749 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 17:04:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-01-31 17:04:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 594. [2022-01-31 17:04:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 527 states have (on average 1.25426944971537) internal successors, (661), 542 states have internal predecessors, (661), 35 states have call successors, (35), 7 states have call predecessors, (35), 31 states have return successors, (119), 44 states have call predecessors, (119), 33 states have call successors, (119) [2022-01-31 17:04:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 815 transitions. [2022-01-31 17:04:48,698 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 815 transitions. Word has length 70 [2022-01-31 17:04:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:48,698 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 815 transitions. [2022-01-31 17:04:48,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:48,698 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 815 transitions. [2022-01-31 17:04:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 17:04:48,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:48,700 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:48,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:04:48,700 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1282379045, now seen corresponding path program 1 times [2022-01-31 17:04:48,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:48,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822922285] [2022-01-31 17:04:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:48,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:48,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:48,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:48,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:48,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:48,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:04:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:49,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:04:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:49,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 17:04:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:49,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 17:04:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 17:04:49,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:49,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822922285] [2022-01-31 17:04:49,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [822922285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:49,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:49,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:04:49,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57080551] [2022-01-31 17:04:49,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:49,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:04:49,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:49,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:04:49,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:04:49,086 INFO L87 Difference]: Start difference. First operand 594 states and 815 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:04:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:51,500 INFO L93 Difference]: Finished difference Result 807 states and 1097 transitions. [2022-01-31 17:04:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:04:51,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 74 [2022-01-31 17:04:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:51,502 INFO L225 Difference]: With dead ends: 807 [2022-01-31 17:04:51,502 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 17:04:51,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:04:51,503 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 158 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:51,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 86 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:04:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 17:04:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 594. [2022-01-31 17:04:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 527 states have (on average 1.2504743833017078) internal successors, (659), 542 states have internal predecessors, (659), 35 states have call successors, (35), 7 states have call predecessors, (35), 31 states have return successors, (119), 44 states have call predecessors, (119), 33 states have call successors, (119) [2022-01-31 17:04:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 813 transitions. [2022-01-31 17:04:52,925 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 813 transitions. Word has length 74 [2022-01-31 17:04:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:52,925 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 813 transitions. [2022-01-31 17:04:52,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:04:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 813 transitions. [2022-01-31 17:04:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 17:04:52,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:52,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:52,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:04:52,927 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash -467901901, now seen corresponding path program 2 times [2022-01-31 17:04:52,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:52,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281054190] [2022-01-31 17:04:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:52,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:52,928 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:52,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:52,930 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:53,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:53,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:04:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:04:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:53,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 17:04:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:53,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 17:04:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:04:53,250 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281054190] [2022-01-31 17:04:53,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1281054190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:53,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:53,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:04:53,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711738863] [2022-01-31 17:04:53,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:53,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:04:53,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:04:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:04:53,251 INFO L87 Difference]: Start difference. First operand 594 states and 813 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:04:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:56,162 INFO L93 Difference]: Finished difference Result 739 states and 1003 transitions. [2022-01-31 17:04:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:04:56,162 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 74 [2022-01-31 17:04:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:56,164 INFO L225 Difference]: With dead ends: 739 [2022-01-31 17:04:56,164 INFO L226 Difference]: Without dead ends: 737 [2022-01-31 17:04:56,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:04:56,165 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 241 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:56,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 138 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:04:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-31 17:04:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 619. [2022-01-31 17:04:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 547 states have (on average 1.246800731261426) internal successors, (682), 562 states have internal predecessors, (682), 39 states have call successors, (39), 8 states have call predecessors, (39), 32 states have return successors, (123), 48 states have call predecessors, (123), 37 states have call successors, (123) [2022-01-31 17:04:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 844 transitions. [2022-01-31 17:04:57,708 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 844 transitions. Word has length 74 [2022-01-31 17:04:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:57,708 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 844 transitions. [2022-01-31 17:04:57,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:04:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 844 transitions. [2022-01-31 17:04:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:04:57,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:57,710 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:57,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:04:57,710 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:57,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:57,710 INFO L85 PathProgramCache]: Analyzing trace with hash 451130911, now seen corresponding path program 3 times [2022-01-31 17:04:57,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:57,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753955812] [2022-01-31 17:04:57,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:57,712 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:57,712 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:57,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:57,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:58,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:58,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:04:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:58,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:58,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753955812] [2022-01-31 17:04:58,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [753955812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:58,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:58,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:04:58,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023158598] [2022-01-31 17:04:58,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:58,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:04:58,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:04:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:04:58,741 INFO L87 Difference]: Start difference. First operand 619 states and 844 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:09,883 INFO L93 Difference]: Finished difference Result 1473 states and 1983 transitions. [2022-01-31 17:05:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:05:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-01-31 17:05:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:09,886 INFO L225 Difference]: With dead ends: 1473 [2022-01-31 17:05:09,886 INFO L226 Difference]: Without dead ends: 1273 [2022-01-31 17:05:09,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=373, Invalid=4318, Unknown=1, NotChecked=0, Total=4692 [2022-01-31 17:05:09,888 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 478 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6436 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 6620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 6436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:09,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 291 Invalid, 6620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 6436 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-31 17:05:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-01-31 17:05:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 662. [2022-01-31 17:05:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 581 states have (on average 1.2650602409638554) internal successors, (735), 605 states have internal predecessors, (735), 41 states have call successors, (41), 8 states have call predecessors, (41), 39 states have return successors, (170), 48 states have call predecessors, (170), 39 states have call successors, (170) [2022-01-31 17:05:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 946 transitions. [2022-01-31 17:05:11,596 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 946 transitions. Word has length 71 [2022-01-31 17:05:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:11,597 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 946 transitions. [2022-01-31 17:05:11,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 946 transitions. [2022-01-31 17:05:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 17:05:11,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:11,599 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:11,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:05:11,599 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash -719866530, now seen corresponding path program 3 times [2022-01-31 17:05:11,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:11,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586397536] [2022-01-31 17:05:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:11,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:11,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:11,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:11,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:11,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:11,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:05:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:11,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 17:05:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:11,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 17:05:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:11,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 17:05:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:11,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 17:05:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 17:05:11,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:11,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586397536] [2022-01-31 17:05:11,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1586397536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:11,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:11,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:05:11,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720731615] [2022-01-31 17:05:11,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:11,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:05:11,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:05:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:05:11,695 INFO L87 Difference]: Start difference. First operand 662 states and 946 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 17:05:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:13,941 INFO L93 Difference]: Finished difference Result 762 states and 1074 transitions. [2022-01-31 17:05:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:05:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 76 [2022-01-31 17:05:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:13,943 INFO L225 Difference]: With dead ends: 762 [2022-01-31 17:05:13,943 INFO L226 Difference]: Without dead ends: 638 [2022-01-31 17:05:13,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:05:13,944 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:13,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 79 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-31 17:05:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2022-01-31 17:05:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 561 states have (on average 1.2602495543672014) internal successors, (707), 587 states have internal predecessors, (707), 35 states have call successors, (35), 8 states have call predecessors, (35), 39 states have return successors, (160), 40 states have call predecessors, (160), 33 states have call successors, (160) [2022-01-31 17:05:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 902 transitions. [2022-01-31 17:05:15,540 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 902 transitions. Word has length 76 [2022-01-31 17:05:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:15,540 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 902 transitions. [2022-01-31 17:05:15,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 17:05:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 902 transitions. [2022-01-31 17:05:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:05:15,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:15,542 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:15,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:05:15,542 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash -849235211, now seen corresponding path program 4 times [2022-01-31 17:05:15,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:15,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201976856] [2022-01-31 17:05:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:15,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:15,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:15,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:15,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:15,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:15,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:05:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:16,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 17:05:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:16,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 17:05:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:16,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 17:05:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:05:16,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:16,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201976856] [2022-01-31 17:05:16,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201976856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:16,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:16,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:05:16,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636273612] [2022-01-31 17:05:16,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:16,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:05:16,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:05:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:05:16,033 INFO L87 Difference]: Start difference. First operand 636 states and 902 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 17:05:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:22,756 INFO L93 Difference]: Finished difference Result 1258 states and 1670 transitions. [2022-01-31 17:05:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:05:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 75 [2022-01-31 17:05:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:22,759 INFO L225 Difference]: With dead ends: 1258 [2022-01-31 17:05:22,759 INFO L226 Difference]: Without dead ends: 1214 [2022-01-31 17:05:22,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=334, Invalid=3088, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:05:22,760 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 426 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3597 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 3597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:22,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 238 Invalid, 3784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 3597 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:05:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-01-31 17:05:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 629. [2022-01-31 17:05:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 556 states have (on average 1.2607913669064748) internal successors, (701), 582 states have internal predecessors, (701), 34 states have call successors, (34), 8 states have call predecessors, (34), 38 states have return successors, (153), 38 states have call predecessors, (153), 32 states have call successors, (153) [2022-01-31 17:05:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 888 transitions. [2022-01-31 17:05:24,368 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 888 transitions. Word has length 75 [2022-01-31 17:05:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:24,368 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 888 transitions. [2022-01-31 17:05:24,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 17:05:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 888 transitions. [2022-01-31 17:05:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 17:05:24,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:24,370 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:24,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:05:24,370 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2055287798, now seen corresponding path program 6 times [2022-01-31 17:05:24,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:24,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243638219] [2022-01-31 17:05:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:24,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:24,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:24,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:24,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:24,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:05:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:24,752 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:24,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243638219] [2022-01-31 17:05:24,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243638219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:24,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:24,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:05:24,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934236715] [2022-01-31 17:05:24,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:24,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:05:24,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:24,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:05:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:05:24,753 INFO L87 Difference]: Start difference. First operand 629 states and 888 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:29,611 INFO L93 Difference]: Finished difference Result 970 states and 1316 transitions. [2022-01-31 17:05:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:05:29,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-01-31 17:05:29,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:29,616 INFO L225 Difference]: With dead ends: 970 [2022-01-31 17:05:29,616 INFO L226 Difference]: Without dead ends: 877 [2022-01-31 17:05:29,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:05:29,618 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 290 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:29,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 193 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:05:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-31 17:05:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 627. [2022-01-31 17:05:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 554 states have (on average 1.2545126353790614) internal successors, (695), 580 states have internal predecessors, (695), 34 states have call successors, (34), 8 states have call predecessors, (34), 38 states have return successors, (153), 38 states have call predecessors, (153), 32 states have call successors, (153) [2022-01-31 17:05:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 882 transitions. [2022-01-31 17:05:31,246 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 882 transitions. Word has length 72 [2022-01-31 17:05:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:31,246 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 882 transitions. [2022-01-31 17:05:31,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 882 transitions. [2022-01-31 17:05:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 17:05:31,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:31,248 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2022-01-31 17:05:31,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:05:31,248 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1009413156, now seen corresponding path program 11 times [2022-01-31 17:05:31,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:31,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713734964] [2022-01-31 17:05:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:31,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:31,249 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:31,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:31,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:31,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:31,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:05:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:31,421 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:31,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713734964] [2022-01-31 17:05:31,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [713734964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:31,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:31,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:05:31,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666938198] [2022-01-31 17:05:31,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:31,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:05:31,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:31,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:05:31,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:05:31,422 INFO L87 Difference]: Start difference. First operand 627 states and 882 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:40,021 INFO L93 Difference]: Finished difference Result 1676 states and 2183 transitions. [2022-01-31 17:05:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:05:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 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 72 [2022-01-31 17:05:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:40,026 INFO L225 Difference]: With dead ends: 1676 [2022-01-31 17:05:40,027 INFO L226 Difference]: Without dead ends: 1595 [2022-01-31 17:05:40,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=606, Invalid=3554, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:05:40,029 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 672 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3483 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 3483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:40,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 237 Invalid, 3920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 3483 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:05:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-01-31 17:05:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 712. [2022-01-31 17:05:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 639 states have (on average 1.244131455399061) internal successors, (795), 657 states have internal predecessors, (795), 34 states have call successors, (34), 8 states have call predecessors, (34), 38 states have return successors, (149), 46 states have call predecessors, (149), 32 states have call successors, (149) [2022-01-31 17:05:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 978 transitions. [2022-01-31 17:05:41,953 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 978 transitions. Word has length 72 [2022-01-31 17:05:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:41,953 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 978 transitions. [2022-01-31 17:05:41,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 978 transitions. [2022-01-31 17:05:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:05:41,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:41,955 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:41,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:05:41,955 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:41,955 INFO L85 PathProgramCache]: Analyzing trace with hash 217087781, now seen corresponding path program 4 times [2022-01-31 17:05:41,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:41,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652453017] [2022-01-31 17:05:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:41,956 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:41,956 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:41,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:41,958 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:42,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:42,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:05:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:42,103 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:42,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652453017] [2022-01-31 17:05:42,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652453017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:42,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:42,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:05:42,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236836679] [2022-01-31 17:05:42,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:42,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:05:42,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:42,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:05:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:05:42,104 INFO L87 Difference]: Start difference. First operand 712 states and 978 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:05:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:44,714 INFO L93 Difference]: Finished difference Result 741 states and 1016 transitions. [2022-01-31 17:05:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:05:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2022-01-31 17:05:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:44,716 INFO L225 Difference]: With dead ends: 741 [2022-01-31 17:05:44,716 INFO L226 Difference]: Without dead ends: 732 [2022-01-31 17:05:44,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:05:44,717 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 106 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:44,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 154 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:05:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-31 17:05:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 721. [2022-01-31 17:05:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 648 states have (on average 1.2453703703703705) internal successors, (807), 666 states have internal predecessors, (807), 34 states have call successors, (34), 8 states have call predecessors, (34), 38 states have return successors, (149), 46 states have call predecessors, (149), 32 states have call successors, (149) [2022-01-31 17:05:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 990 transitions. [2022-01-31 17:05:46,677 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 990 transitions. Word has length 73 [2022-01-31 17:05:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:46,677 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 990 transitions. [2022-01-31 17:05:46,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:05:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 990 transitions. [2022-01-31 17:05:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 17:05:46,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:46,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:46,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:05:46,680 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1111634206, now seen corresponding path program 1 times [2022-01-31 17:05:46,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:46,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046318333] [2022-01-31 17:05:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:46,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:46,681 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:46,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:46,683 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:46,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:05:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:46,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:05:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:46,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 17:05:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:47,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 17:05:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:47,002 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:47,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046318333] [2022-01-31 17:05:47,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046318333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:47,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:47,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:05:47,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025227954] [2022-01-31 17:05:47,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:47,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:05:47,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:05:47,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:05:47,003 INFO L87 Difference]: Start difference. First operand 721 states and 990 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:05:50,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:50,814 INFO L93 Difference]: Finished difference Result 909 states and 1235 transitions. [2022-01-31 17:05:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:05:50,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 76 [2022-01-31 17:05:50,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:50,817 INFO L225 Difference]: With dead ends: 909 [2022-01-31 17:05:50,817 INFO L226 Difference]: Without dead ends: 907 [2022-01-31 17:05:50,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:05:50,818 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 242 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:50,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 152 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:05:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-31 17:05:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 742. [2022-01-31 17:05:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 666 states have (on average 1.2417417417417418) internal successors, (827), 683 states have internal predecessors, (827), 37 states have call successors, (37), 8 states have call predecessors, (37), 38 states have return successors, (152), 50 states have call predecessors, (152), 35 states have call successors, (152) [2022-01-31 17:05:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1016 transitions. [2022-01-31 17:05:52,912 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1016 transitions. Word has length 76 [2022-01-31 17:05:52,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:52,912 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1016 transitions. [2022-01-31 17:05:52,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:05:52,912 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1016 transitions. [2022-01-31 17:05:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:05:52,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:52,914 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:52,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:05:52,914 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:52,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:52,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1226056045, now seen corresponding path program 14 times [2022-01-31 17:05:52,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:52,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213795749] [2022-01-31 17:05:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:52,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:52,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:52,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:52,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:53,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:53,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:05:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:53,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:53,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213795749] [2022-01-31 17:05:53,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213795749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:53,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:53,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:05:53,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514994784] [2022-01-31 17:05:53,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:53,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:05:53,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:53,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:05:53,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:05:53,479 INFO L87 Difference]: Start difference. First operand 742 states and 1016 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:59,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:59,568 INFO L93 Difference]: Finished difference Result 1342 states and 1779 transitions. [2022-01-31 17:05:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:05:59,568 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-01-31 17:05:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:59,571 INFO L225 Difference]: With dead ends: 1342 [2022-01-31 17:05:59,571 INFO L226 Difference]: Without dead ends: 1166 [2022-01-31 17:05:59,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:05:59,573 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 267 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4097 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 4182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 4097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:59,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 219 Invalid, 4182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 4097 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:05:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-01-31 17:06:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 758. [2022-01-31 17:06:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 681 states have (on average 1.2378854625550662) internal successors, (843), 697 states have internal predecessors, (843), 37 states have call successors, (37), 8 states have call predecessors, (37), 39 states have return successors, (154), 52 states have call predecessors, (154), 35 states have call successors, (154) [2022-01-31 17:06:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1034 transitions. [2022-01-31 17:06:01,718 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1034 transitions. Word has length 73 [2022-01-31 17:06:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:01,718 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 1034 transitions. [2022-01-31 17:06:01,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1034 transitions. [2022-01-31 17:06:01,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:06:01,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:01,720 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:01,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:06:01,720 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:01,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1760998747, now seen corresponding path program 15 times [2022-01-31 17:06:01,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:01,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511455546] [2022-01-31 17:06:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:01,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:01,722 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:01,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:01,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:02,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:02,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:06:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:02,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:02,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511455546] [2022-01-31 17:06:02,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511455546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:02,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:02,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:06:02,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802841449] [2022-01-31 17:06:02,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:02,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:06:02,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:02,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:06:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:06:02,768 INFO L87 Difference]: Start difference. First operand 758 states and 1034 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:13,883 INFO L93 Difference]: Finished difference Result 1940 states and 2523 transitions. [2022-01-31 17:06:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:06:13,888 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-01-31 17:06:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:13,893 INFO L225 Difference]: With dead ends: 1940 [2022-01-31 17:06:13,893 INFO L226 Difference]: Without dead ends: 1764 [2022-01-31 17:06:13,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=454, Invalid=4948, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:06:13,896 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 537 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 6797 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 7131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 6797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:13,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 237 Invalid, 7131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 6797 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 17:06:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-01-31 17:06:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 770. [2022-01-31 17:06:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 692 states have (on average 1.2326589595375723) internal successors, (853), 707 states have internal predecessors, (853), 37 states have call successors, (37), 8 states have call predecessors, (37), 40 states have return successors, (156), 54 states have call predecessors, (156), 35 states have call successors, (156) [2022-01-31 17:06:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1046 transitions. [2022-01-31 17:06:16,059 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1046 transitions. Word has length 73 [2022-01-31 17:06:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:16,060 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1046 transitions. [2022-01-31 17:06:16,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1046 transitions. [2022-01-31 17:06:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:06:16,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:16,062 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:16,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:06:16,062 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1713361047, now seen corresponding path program 16 times [2022-01-31 17:06:16,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:16,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451069387] [2022-01-31 17:06:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:16,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:16,063 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:16,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:16,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:16,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:06:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:16,616 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:16,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451069387] [2022-01-31 17:06:16,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451069387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:16,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:16,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:06:16,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170695267] [2022-01-31 17:06:16,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:16,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:06:16,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:06:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:06:16,617 INFO L87 Difference]: Start difference. First operand 770 states and 1046 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:22,643 INFO L93 Difference]: Finished difference Result 1391 states and 1852 transitions. [2022-01-31 17:06:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:06:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-01-31 17:06:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:22,645 INFO L225 Difference]: With dead ends: 1391 [2022-01-31 17:06:22,645 INFO L226 Difference]: Without dead ends: 1222 [2022-01-31 17:06:22,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:06:22,647 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 301 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 3208 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:22,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 181 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3208 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:06:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-01-31 17:06:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 786. [2022-01-31 17:06:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 707 states have (on average 1.229137199434229) internal successors, (869), 721 states have internal predecessors, (869), 37 states have call successors, (37), 8 states have call predecessors, (37), 41 states have return successors, (158), 56 states have call predecessors, (158), 35 states have call successors, (158) [2022-01-31 17:06:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1064 transitions. [2022-01-31 17:06:24,859 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1064 transitions. Word has length 73 [2022-01-31 17:06:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:24,859 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1064 transitions. [2022-01-31 17:06:24,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1064 transitions. [2022-01-31 17:06:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:06:24,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:24,861 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:24,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:06:24,861 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:24,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:24,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2004375597, now seen corresponding path program 17 times [2022-01-31 17:06:24,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:24,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084977439] [2022-01-31 17:06:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:24,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:24,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:24,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:24,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:25,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:25,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:06:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:25,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:25,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084977439] [2022-01-31 17:06:25,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1084977439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:25,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:25,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:06:25,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102996146] [2022-01-31 17:06:25,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:25,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:06:25,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:25,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:06:25,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:06:25,409 INFO L87 Difference]: Start difference. First operand 786 states and 1064 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:31,825 INFO L93 Difference]: Finished difference Result 1294 states and 1725 transitions. [2022-01-31 17:06:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:06:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-01-31 17:06:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:31,828 INFO L225 Difference]: With dead ends: 1294 [2022-01-31 17:06:31,828 INFO L226 Difference]: Without dead ends: 1218 [2022-01-31 17:06:31,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=2125, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:06:31,829 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 286 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4229 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 4320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 4229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:31,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 217 Invalid, 4320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 4229 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:06:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2022-01-31 17:06:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 786. [2022-01-31 17:06:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 707 states have (on average 1.229137199434229) internal successors, (869), 721 states have internal predecessors, (869), 37 states have call successors, (37), 8 states have call predecessors, (37), 41 states have return successors, (158), 56 states have call predecessors, (158), 35 states have call successors, (158) [2022-01-31 17:06:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1064 transitions. [2022-01-31 17:06:34,056 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1064 transitions. Word has length 73 [2022-01-31 17:06:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:34,056 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1064 transitions. [2022-01-31 17:06:34,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1064 transitions. [2022-01-31 17:06:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:06:34,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:34,058 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:34,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:06:34,058 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash 311533595, now seen corresponding path program 18 times [2022-01-31 17:06:34,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:34,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656665912] [2022-01-31 17:06:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:34,059 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:34,059 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:34,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:34,061 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:34,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:06:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:34,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:34,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656665912] [2022-01-31 17:06:34,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [656665912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:34,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:34,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:06:34,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228580946] [2022-01-31 17:06:34,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:34,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:06:34,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:06:34,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:06:34,437 INFO L87 Difference]: Start difference. First operand 786 states and 1064 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:37,845 INFO L93 Difference]: Finished difference Result 1021 states and 1373 transitions. [2022-01-31 17:06:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:06:37,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-01-31 17:06:37,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:37,847 INFO L225 Difference]: With dead ends: 1021 [2022-01-31 17:06:37,847 INFO L226 Difference]: Without dead ends: 911 [2022-01-31 17:06:37,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:06:37,849 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 134 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:37,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 129 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:06:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-01-31 17:06:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 778. [2022-01-31 17:06:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 699 states have (on average 1.217453505007153) internal successors, (851), 713 states have internal predecessors, (851), 37 states have call successors, (37), 8 states have call predecessors, (37), 41 states have return successors, (158), 56 states have call predecessors, (158), 35 states have call successors, (158) [2022-01-31 17:06:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1046 transitions. [2022-01-31 17:06:40,068 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1046 transitions. Word has length 73 [2022-01-31 17:06:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:40,068 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1046 transitions. [2022-01-31 17:06:40,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:40,068 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1046 transitions. [2022-01-31 17:06:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:06:40,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:40,070 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:40,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:06:40,071 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash -265697057, now seen corresponding path program 19 times [2022-01-31 17:06:40,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:40,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111064606] [2022-01-31 17:06:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:40,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:40,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:40,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:40,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:40,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:40,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:06:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:40,606 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:40,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111064606] [2022-01-31 17:06:40,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111064606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:40,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:40,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:06:40,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098138034] [2022-01-31 17:06:40,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:40,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:06:40,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:40,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:06:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:06:40,607 INFO L87 Difference]: Start difference. First operand 778 states and 1046 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:46,890 INFO L93 Difference]: Finished difference Result 1388 states and 1825 transitions. [2022-01-31 17:06:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:06:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-01-31 17:06:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:46,892 INFO L225 Difference]: With dead ends: 1388 [2022-01-31 17:06:46,893 INFO L226 Difference]: Without dead ends: 1219 [2022-01-31 17:06:46,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=2123, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:06:46,894 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 296 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 4073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:46,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 222 Invalid, 4073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:06:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-01-31 17:06:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 800. [2022-01-31 17:06:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 720 states have (on average 1.2125) internal successors, (873), 733 states have internal predecessors, (873), 37 states have call successors, (37), 8 states have call predecessors, (37), 42 states have return successors, (160), 58 states have call predecessors, (160), 35 states have call successors, (160) [2022-01-31 17:06:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1070 transitions. [2022-01-31 17:06:49,169 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1070 transitions. Word has length 73 [2022-01-31 17:06:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:49,169 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1070 transitions. [2022-01-31 17:06:49,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1070 transitions. [2022-01-31 17:06:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:06:49,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:49,171 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:49,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:06:49,171 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1977878885, now seen corresponding path program 20 times [2022-01-31 17:06:49,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:49,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376755603] [2022-01-31 17:06:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:49,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:49,172 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:49,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:49,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:49,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:49,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:06:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:49,729 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:49,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376755603] [2022-01-31 17:06:49,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376755603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:49,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:49,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:06:49,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694000319] [2022-01-31 17:06:49,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:49,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:06:49,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:49,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:06:49,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:06:49,729 INFO L87 Difference]: Start difference. First operand 800 states and 1070 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:55,729 INFO L93 Difference]: Finished difference Result 1291 states and 1700 transitions. [2022-01-31 17:06:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:06:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-01-31 17:06:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:55,731 INFO L225 Difference]: With dead ends: 1291 [2022-01-31 17:06:55,731 INFO L226 Difference]: Without dead ends: 1215 [2022-01-31 17:06:55,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:06:55,733 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 307 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:55,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 186 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3142 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:06:55,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-01-31 17:06:58,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 800. [2022-01-31 17:06:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 720 states have (on average 1.2125) internal successors, (873), 733 states have internal predecessors, (873), 37 states have call successors, (37), 8 states have call predecessors, (37), 42 states have return successors, (160), 58 states have call predecessors, (160), 35 states have call successors, (160) [2022-01-31 17:06:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1070 transitions. [2022-01-31 17:06:58,019 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1070 transitions. Word has length 73 [2022-01-31 17:06:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:58,019 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1070 transitions. [2022-01-31 17:06:58,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1070 transitions. [2022-01-31 17:06:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:06:58,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:58,021 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:58,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:06:58,021 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1637382525, now seen corresponding path program 4 times [2022-01-31 17:06:58,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:58,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766468755] [2022-01-31 17:06:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:58,022 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:58,022 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:58,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:58,024 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:58,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:58,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:06:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:58,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766468755] [2022-01-31 17:06:58,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766468755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:58,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:58,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:06:58,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784349251] [2022-01-31 17:06:58,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:58,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:06:58,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:58,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:06:58,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:06:58,509 INFO L87 Difference]: Start difference. First operand 800 states and 1070 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:07,839 INFO L93 Difference]: Finished difference Result 1750 states and 2275 transitions. [2022-01-31 17:07:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:07:07,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (4), 3 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 73 [2022-01-31 17:07:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:07,842 INFO L225 Difference]: With dead ends: 1750 [2022-01-31 17:07:07,842 INFO L226 Difference]: Without dead ends: 1712 [2022-01-31 17:07:07,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=314, Invalid=2338, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:07:07,844 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 429 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3276 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 3428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 3276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:07,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 257 Invalid, 3428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 3276 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:07:07,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-01-31 17:07:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 785. [2022-01-31 17:07:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 705 states have (on average 1.2156028368794327) internal successors, (857), 719 states have internal predecessors, (857), 37 states have call successors, (37), 8 states have call predecessors, (37), 42 states have return successors, (159), 57 states have call predecessors, (159), 35 states have call successors, (159) [2022-01-31 17:07:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1053 transitions. [2022-01-31 17:07:10,112 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1053 transitions. Word has length 73 [2022-01-31 17:07:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:10,112 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1053 transitions. [2022-01-31 17:07:10,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1053 transitions. [2022-01-31 17:07:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 17:07:10,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:10,114 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:10,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:07:10,114 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:10,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:10,114 INFO L85 PathProgramCache]: Analyzing trace with hash 396355703, now seen corresponding path program 1 times [2022-01-31 17:07:10,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:10,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987771289] [2022-01-31 17:07:10,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:10,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:10,115 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:10,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:10,117 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:10,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:10,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:07:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:10,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 17:07:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:10,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 17:07:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 17:07:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:10,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 17:07:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:07:10,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:10,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987771289] [2022-01-31 17:07:10,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1987771289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:10,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:10,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:07:10,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88070345] [2022-01-31 17:07:10,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:10,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:07:10,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:07:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:07:10,246 INFO L87 Difference]: Start difference. First operand 785 states and 1053 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 17:07:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:12,852 INFO L93 Difference]: Finished difference Result 828 states and 1104 transitions. [2022-01-31 17:07:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:07:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2022-01-31 17:07:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:12,854 INFO L225 Difference]: With dead ends: 828 [2022-01-31 17:07:12,854 INFO L226 Difference]: Without dead ends: 768 [2022-01-31 17:07:12,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:07:12,855 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 96 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:12,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 74 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-31 17:07:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 763. [2022-01-31 17:07:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 688 states have (on average 1.2122093023255813) internal successors, (834), 702 states have internal predecessors, (834), 32 states have call successors, (32), 8 states have call predecessors, (32), 42 states have return successors, (153), 52 states have call predecessors, (153), 30 states have call successors, (153) [2022-01-31 17:07:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1019 transitions. [2022-01-31 17:07:15,083 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1019 transitions. Word has length 78 [2022-01-31 17:07:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:15,083 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 1019 transitions. [2022-01-31 17:07:15,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 17:07:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1019 transitions. [2022-01-31 17:07:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:07:15,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:15,085 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:15,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:07:15,085 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:15,085 INFO L85 PathProgramCache]: Analyzing trace with hash -414920260, now seen corresponding path program 2 times [2022-01-31 17:07:15,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:15,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109695016] [2022-01-31 17:07:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:15,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:15,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:15,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:15,088 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:15,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:07:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:15,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 17:07:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:15,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 17:07:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:15,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 17:07:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:15,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:15,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109695016] [2022-01-31 17:07:15,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109695016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:15,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:15,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:07:15,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518492388] [2022-01-31 17:07:15,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:15,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:07:15,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:07:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:07:15,633 INFO L87 Difference]: Start difference. First operand 763 states and 1019 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:07:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:21,328 INFO L93 Difference]: Finished difference Result 1158 states and 1496 transitions. [2022-01-31 17:07:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:07:21,328 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 77 [2022-01-31 17:07:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:21,330 INFO L225 Difference]: With dead ends: 1158 [2022-01-31 17:07:21,330 INFO L226 Difference]: Without dead ends: 1100 [2022-01-31 17:07:21,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=267, Invalid=2385, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:07:21,331 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 274 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:21,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 176 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:07:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-01-31 17:07:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 745. [2022-01-31 17:07:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 674 states have (on average 1.21513353115727) internal successors, (819), 687 states have internal predecessors, (819), 29 states have call successors, (29), 8 states have call predecessors, (29), 41 states have return successors, (144), 49 states have call predecessors, (144), 27 states have call successors, (144) [2022-01-31 17:07:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 992 transitions. [2022-01-31 17:07:23,471 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 992 transitions. Word has length 77 [2022-01-31 17:07:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:23,471 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 992 transitions. [2022-01-31 17:07:23,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:07:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 992 transitions. [2022-01-31 17:07:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:07:23,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:23,473 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:23,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:07:23,473 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash 692226012, now seen corresponding path program 7 times [2022-01-31 17:07:23,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:23,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779235532] [2022-01-31 17:07:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:23,474 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:23,475 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:23,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:23,476 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:23,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:23,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:07:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:24,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:24,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779235532] [2022-01-31 17:07:24,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [779235532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:24,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:24,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:07:24,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318020625] [2022-01-31 17:07:24,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:24,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:07:24,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:07:24,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:07:24,069 INFO L87 Difference]: Start difference. First operand 745 states and 992 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:30,983 INFO L93 Difference]: Finished difference Result 1224 states and 1585 transitions. [2022-01-31 17:07:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:07:30,983 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-01-31 17:07:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:30,985 INFO L225 Difference]: With dead ends: 1224 [2022-01-31 17:07:30,985 INFO L226 Difference]: Without dead ends: 1120 [2022-01-31 17:07:30,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:07:30,986 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 401 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3908 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 4022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:30,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 230 Invalid, 4022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3908 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 17:07:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-31 17:07:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 669. [2022-01-31 17:07:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 603 states have (on average 1.2238805970149254) internal successors, (738), 616 states have internal predecessors, (738), 29 states have call successors, (29), 8 states have call predecessors, (29), 36 states have return successors, (134), 44 states have call predecessors, (134), 27 states have call successors, (134) [2022-01-31 17:07:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 901 transitions. [2022-01-31 17:07:32,954 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 901 transitions. Word has length 75 [2022-01-31 17:07:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:32,954 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 901 transitions. [2022-01-31 17:07:32,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 901 transitions. [2022-01-31 17:07:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 17:07:32,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:32,955 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:32,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:07:32,955 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1629327435, now seen corresponding path program 5 times [2022-01-31 17:07:32,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:32,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889060117] [2022-01-31 17:07:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:32,957 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:32,957 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:32,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:32,959 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:33,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:33,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:07:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:33,115 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:33,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889060117] [2022-01-31 17:07:33,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1889060117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:33,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:33,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:07:33,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541751503] [2022-01-31 17:07:33,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:33,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:07:33,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:33,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:07:33,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:07:33,116 INFO L87 Difference]: Start difference. First operand 669 states and 901 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:07:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:35,828 INFO L93 Difference]: Finished difference Result 696 states and 937 transitions. [2022-01-31 17:07:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:07:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2022-01-31 17:07:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:35,829 INFO L225 Difference]: With dead ends: 696 [2022-01-31 17:07:35,829 INFO L226 Difference]: Without dead ends: 687 [2022-01-31 17:07:35,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:07:35,830 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 110 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:35,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 161 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:07:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-31 17:07:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 678. [2022-01-31 17:07:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 612 states have (on average 1.2254901960784315) internal successors, (750), 625 states have internal predecessors, (750), 29 states have call successors, (29), 8 states have call predecessors, (29), 36 states have return successors, (134), 44 states have call predecessors, (134), 27 states have call successors, (134) [2022-01-31 17:07:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 913 transitions. [2022-01-31 17:07:37,823 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 913 transitions. Word has length 76 [2022-01-31 17:07:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:37,823 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 913 transitions. [2022-01-31 17:07:37,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:07:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 913 transitions. [2022-01-31 17:07:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:07:37,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:37,825 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:37,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:07:37,825 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:37,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1224053702, now seen corresponding path program 8 times [2022-01-31 17:07:37,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:37,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492054730] [2022-01-31 17:07:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:37,826 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:37,826 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:37,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:37,828 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:38,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:38,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:07:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:38,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492054730] [2022-01-31 17:07:38,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [492054730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:38,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:38,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:07:38,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233858267] [2022-01-31 17:07:38,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:38,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:07:38,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:38,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:07:38,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:07:38,040 INFO L87 Difference]: Start difference. First operand 678 states and 913 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:46,974 INFO L93 Difference]: Finished difference Result 1645 states and 2128 transitions. [2022-01-31 17:07:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:07:46,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (4), 3 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 77 [2022-01-31 17:07:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:46,977 INFO L225 Difference]: With dead ends: 1645 [2022-01-31 17:07:46,977 INFO L226 Difference]: Without dead ends: 1636 [2022-01-31 17:07:46,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:07:46,978 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 379 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3200 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 3327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:46,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 252 Invalid, 3327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:07:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-01-31 17:07:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 684. [2022-01-31 17:07:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 618 states have (on average 1.2281553398058251) internal successors, (759), 631 states have internal predecessors, (759), 29 states have call successors, (29), 8 states have call predecessors, (29), 36 states have return successors, (134), 44 states have call predecessors, (134), 27 states have call successors, (134) [2022-01-31 17:07:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 922 transitions. [2022-01-31 17:07:49,006 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 922 transitions. Word has length 77 [2022-01-31 17:07:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:49,006 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 922 transitions. [2022-01-31 17:07:49,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 922 transitions. [2022-01-31 17:07:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:07:49,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:49,008 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:49,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:07:49,008 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2021160054, now seen corresponding path program 12 times [2022-01-31 17:07:49,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:49,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386049153] [2022-01-31 17:07:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:49,009 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:49,009 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:49,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:49,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:49,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:49,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:07:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:49,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386049153] [2022-01-31 17:07:49,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [386049153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:49,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:49,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:07:49,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55046790] [2022-01-31 17:07:49,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:49,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:07:49,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:07:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:07:49,514 INFO L87 Difference]: Start difference. First operand 684 states and 922 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:55,194 INFO L93 Difference]: Finished difference Result 1191 states and 1580 transitions. [2022-01-31 17:07:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:07:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 77 [2022-01-31 17:07:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:55,196 INFO L225 Difference]: With dead ends: 1191 [2022-01-31 17:07:55,196 INFO L226 Difference]: Without dead ends: 1140 [2022-01-31 17:07:55,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:07:55,197 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 309 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:55,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 170 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:07:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-31 17:07:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 707. [2022-01-31 17:07:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 640 states have (on average 1.2296875) internal successors, (787), 653 states have internal predecessors, (787), 29 states have call successors, (29), 8 states have call predecessors, (29), 37 states have return successors, (135), 45 states have call predecessors, (135), 27 states have call successors, (135) [2022-01-31 17:07:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 951 transitions. [2022-01-31 17:07:57,297 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 951 transitions. Word has length 77 [2022-01-31 17:07:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:57,297 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 951 transitions. [2022-01-31 17:07:57,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 951 transitions. [2022-01-31 17:07:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 17:07:57,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:57,299 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:57,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:07:57,299 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1560034257, now seen corresponding path program 6 times [2022-01-31 17:07:57,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975826837] [2022-01-31 17:07:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:57,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:57,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:57,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:57,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:57,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:57,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:07:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:57,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 17:07:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:57,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 17:07:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:57,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 17:07:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:57,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 17:07:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 17:07:57,488 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:57,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975826837] [2022-01-31 17:07:57,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975826837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:57,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:57,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:07:57,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595067642] [2022-01-31 17:07:57,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:57,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:07:57,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:07:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:07:57,489 INFO L87 Difference]: Start difference. First operand 707 states and 951 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 17:08:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:01,559 INFO L93 Difference]: Finished difference Result 924 states and 1216 transitions. [2022-01-31 17:08:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:08:01,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 82 [2022-01-31 17:08:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:01,561 INFO L225 Difference]: With dead ends: 924 [2022-01-31 17:08:01,561 INFO L226 Difference]: Without dead ends: 802 [2022-01-31 17:08:01,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:08:01,562 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 243 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:01,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 126 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:08:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-31 17:08:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 697. [2022-01-31 17:08:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 634 states have (on average 1.2287066246056781) internal successors, (779), 643 states have internal predecessors, (779), 28 states have call successors, (28), 8 states have call predecessors, (28), 34 states have return successors, (105), 45 states have call predecessors, (105), 26 states have call successors, (105) [2022-01-31 17:08:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 912 transitions. [2022-01-31 17:08:03,643 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 912 transitions. Word has length 82 [2022-01-31 17:08:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:03,643 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 912 transitions. [2022-01-31 17:08:03,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 17:08:03,644 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 912 transitions. [2022-01-31 17:08:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:08:03,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:03,645 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:03,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:08:03,645 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1756099877, now seen corresponding path program 6 times [2022-01-31 17:08:03,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:03,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92808559] [2022-01-31 17:08:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:03,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:03,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:03,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:03,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:03,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:03,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:08:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:03,813 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:03,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92808559] [2022-01-31 17:08:03,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [92808559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:03,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:03,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:08:03,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029605835] [2022-01-31 17:08:03,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:03,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:08:03,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:03,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:08:03,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:08:03,814 INFO L87 Difference]: Start difference. First operand 697 states and 912 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:08:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:06,704 INFO L93 Difference]: Finished difference Result 725 states and 949 transitions. [2022-01-31 17:08:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:08:06,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 79 [2022-01-31 17:08:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:06,705 INFO L225 Difference]: With dead ends: 725 [2022-01-31 17:08:06,705 INFO L226 Difference]: Without dead ends: 716 [2022-01-31 17:08:06,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:08:06,706 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:06,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 168 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:08:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-31 17:08:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 706. [2022-01-31 17:08:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 643 states have (on average 1.2301710730948678) internal successors, (791), 652 states have internal predecessors, (791), 28 states have call successors, (28), 8 states have call predecessors, (28), 34 states have return successors, (105), 45 states have call predecessors, (105), 26 states have call successors, (105) [2022-01-31 17:08:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 924 transitions. [2022-01-31 17:08:08,844 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 924 transitions. Word has length 79 [2022-01-31 17:08:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:08,844 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 924 transitions. [2022-01-31 17:08:08,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:08:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 924 transitions. [2022-01-31 17:08:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:08:08,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:08,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:08,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:08:08,846 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:08,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:08,846 INFO L85 PathProgramCache]: Analyzing trace with hash 198805217, now seen corresponding path program 7 times [2022-01-31 17:08:08,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:08,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198259673] [2022-01-31 17:08:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:08,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:08,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:08,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:08,849 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:08:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:08:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 17:08:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 17:08:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 17:08:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 17:08:09,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:09,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198259673] [2022-01-31 17:08:09,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1198259673] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:09,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:09,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:08:09,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085021936] [2022-01-31 17:08:09,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:09,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:08:09,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:09,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:08:09,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:08:09,290 INFO L87 Difference]: Start difference. First operand 706 states and 924 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:08:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:14,008 INFO L93 Difference]: Finished difference Result 1035 states and 1325 transitions. [2022-01-31 17:08:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:08:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 83 [2022-01-31 17:08:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:14,010 INFO L225 Difference]: With dead ends: 1035 [2022-01-31 17:08:14,011 INFO L226 Difference]: Without dead ends: 925 [2022-01-31 17:08:14,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:08:14,012 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 329 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:14,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 144 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:08:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-01-31 17:08:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 650. [2022-01-31 17:08:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 592 states have (on average 1.222972972972973) internal successors, (724), 598 states have internal predecessors, (724), 26 states have call successors, (26), 8 states have call predecessors, (26), 31 states have return successors, (88), 43 states have call predecessors, (88), 24 states have call successors, (88) [2022-01-31 17:08:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 838 transitions. [2022-01-31 17:08:15,962 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 838 transitions. Word has length 83 [2022-01-31 17:08:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:15,962 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 838 transitions. [2022-01-31 17:08:15,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:08:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 838 transitions. [2022-01-31 17:08:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 17:08:15,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:15,963 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:15,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:08:15,963 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1040559693, now seen corresponding path program 8 times [2022-01-31 17:08:15,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:15,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405340209] [2022-01-31 17:08:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:15,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:15,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:15,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:15,967 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:16,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:16,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:08:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:16,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 17:08:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:16,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 17:08:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:16,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 17:08:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:16,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 17:08:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 17:08:16,173 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:16,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405340209] [2022-01-31 17:08:16,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [405340209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:16,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:16,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:08:16,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337382592] [2022-01-31 17:08:16,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:16,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:08:16,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:08:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:08:16,174 INFO L87 Difference]: Start difference. First operand 650 states and 838 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:08:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:20,721 INFO L93 Difference]: Finished difference Result 1027 states and 1303 transitions. [2022-01-31 17:08:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:08:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 84 [2022-01-31 17:08:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:20,725 INFO L225 Difference]: With dead ends: 1027 [2022-01-31 17:08:20,725 INFO L226 Difference]: Without dead ends: 911 [2022-01-31 17:08:20,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:08:20,726 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 222 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:20,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 152 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:08:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-01-31 17:08:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 650. [2022-01-31 17:08:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 592 states have (on average 1.2195945945945945) internal successors, (722), 598 states have internal predecessors, (722), 26 states have call successors, (26), 8 states have call predecessors, (26), 31 states have return successors, (88), 43 states have call predecessors, (88), 24 states have call successors, (88) [2022-01-31 17:08:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 836 transitions. [2022-01-31 17:08:22,689 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 836 transitions. Word has length 84 [2022-01-31 17:08:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:22,689 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 836 transitions. [2022-01-31 17:08:22,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:08:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 836 transitions. [2022-01-31 17:08:22,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 17:08:22,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:22,690 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:22,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:08:22,691 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:22,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:22,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1303463998, now seen corresponding path program 9 times [2022-01-31 17:08:22,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:22,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94173390] [2022-01-31 17:08:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:22,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:22,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:22,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:22,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:22,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:22,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:08:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:22,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:22,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94173390] [2022-01-31 17:08:22,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [94173390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:22,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:22,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:08:22,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293926304] [2022-01-31 17:08:22,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:22,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:08:22,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:22,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:08:22,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:08:22,884 INFO L87 Difference]: Start difference. First operand 650 states and 836 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:28,391 INFO L93 Difference]: Finished difference Result 1262 states and 1613 transitions. [2022-01-31 17:08:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:08:28,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 3 states have call successors, (4), 3 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 80 [2022-01-31 17:08:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:28,396 INFO L225 Difference]: With dead ends: 1262 [2022-01-31 17:08:28,396 INFO L226 Difference]: Without dead ends: 856 [2022-01-31 17:08:28,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:08:28,398 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 181 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:28,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 145 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:08:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-01-31 17:08:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 679. [2022-01-31 17:08:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 620 states have (on average 1.2145161290322581) internal successors, (753), 626 states have internal predecessors, (753), 27 states have call successors, (27), 8 states have call predecessors, (27), 31 states have return successors, (98), 44 states have call predecessors, (98), 25 states have call successors, (98) [2022-01-31 17:08:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 878 transitions. [2022-01-31 17:08:30,447 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 878 transitions. Word has length 80 [2022-01-31 17:08:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:30,447 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 878 transitions. [2022-01-31 17:08:30,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 878 transitions. [2022-01-31 17:08:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 17:08:30,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:30,449 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1] [2022-01-31 17:08:30,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:08:30,449 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:30,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2103161354, now seen corresponding path program 13 times [2022-01-31 17:08:30,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:30,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742439806] [2022-01-31 17:08:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:30,450 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:30,450 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:30,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:30,452 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:30,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:08:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:31,385 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:31,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742439806] [2022-01-31 17:08:31,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [742439806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:31,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:31,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:08:31,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731797159] [2022-01-31 17:08:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:31,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:08:31,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:08:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:08:31,386 INFO L87 Difference]: Start difference. First operand 679 states and 878 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:13,328 INFO L93 Difference]: Finished difference Result 2075 states and 2681 transitions. [2022-01-31 17:09:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:09:13,328 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 80 [2022-01-31 17:09:13,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:13,332 INFO L225 Difference]: With dead ends: 2075 [2022-01-31 17:09:13,332 INFO L226 Difference]: Without dead ends: 2031 [2022-01-31 17:09:13,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=871, Invalid=10046, Unknown=3, NotChecked=0, Total=10920 [2022-01-31 17:09:13,334 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 654 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 9444 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 9738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 9444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:13,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 339 Invalid, 9738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 9444 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-01-31 17:09:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2022-01-31 17:09:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 704. [2022-01-31 17:09:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 644 states have (on average 1.2158385093167703) internal successors, (783), 650 states have internal predecessors, (783), 27 states have call successors, (27), 8 states have call predecessors, (27), 32 states have return successors, (99), 45 states have call predecessors, (99), 25 states have call successors, (99) [2022-01-31 17:09:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 909 transitions. [2022-01-31 17:09:15,515 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 909 transitions. Word has length 80 [2022-01-31 17:09:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:15,515 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 909 transitions. [2022-01-31 17:09:15,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 909 transitions. [2022-01-31 17:09:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:09:15,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:15,517 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:15,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:09:15,517 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1442963207, now seen corresponding path program 5 times [2022-01-31 17:09:15,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:15,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750337205] [2022-01-31 17:09:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:15,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:15,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:15,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:15,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:15,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:15,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:09:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:16,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:16,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750337205] [2022-01-31 17:09:16,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1750337205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:16,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:16,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:09:16,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576658732] [2022-01-31 17:09:16,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:16,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:09:16,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:16,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:09:16,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:09:16,088 INFO L87 Difference]: Start difference. First operand 704 states and 909 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:31,345 INFO L93 Difference]: Finished difference Result 2141 states and 2790 transitions. [2022-01-31 17:09:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:09:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2022-01-31 17:09:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:31,351 INFO L225 Difference]: With dead ends: 2141 [2022-01-31 17:09:31,351 INFO L226 Difference]: Without dead ends: 2114 [2022-01-31 17:09:31,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3579 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=916, Invalid=10214, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:09:31,353 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 835 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 9345 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 9829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 9345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:31,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 311 Invalid, 9829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 9345 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 17:09:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2022-01-31 17:09:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 844. [2022-01-31 17:09:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 778 states have (on average 1.2275064267352185) internal successors, (955), 784 states have internal predecessors, (955), 28 states have call successors, (28), 8 states have call predecessors, (28), 37 states have return successors, (135), 51 states have call predecessors, (135), 26 states have call successors, (135) [2022-01-31 17:09:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1118 transitions. [2022-01-31 17:09:33,939 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1118 transitions. Word has length 81 [2022-01-31 17:09:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:33,939 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1118 transitions. [2022-01-31 17:09:33,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1118 transitions. [2022-01-31 17:09:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 17:09:33,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:33,941 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:33,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:09:33,941 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1662615381, now seen corresponding path program 9 times [2022-01-31 17:09:33,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:33,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826240402] [2022-01-31 17:09:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:33,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:33,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:33,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:33,944 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:34,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:34,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:09:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:34,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 17:09:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:34,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 17:09:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:34,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 17:09:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:34,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 17:09:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 17:09:34,587 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826240402] [2022-01-31 17:09:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826240402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:34,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:34,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:09:34,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779732545] [2022-01-31 17:09:34,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:34,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:09:34,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:09:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:09:34,588 INFO L87 Difference]: Start difference. First operand 844 states and 1118 transitions. Second operand has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:09:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:40,054 INFO L93 Difference]: Finished difference Result 1148 states and 1530 transitions. [2022-01-31 17:09:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:09:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 86 [2022-01-31 17:09:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:40,058 INFO L225 Difference]: With dead ends: 1148 [2022-01-31 17:09:40,058 INFO L226 Difference]: Without dead ends: 1042 [2022-01-31 17:09:40,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:09:40,059 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 288 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:40,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 162 Invalid, 2161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:09:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-01-31 17:09:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 856. [2022-01-31 17:09:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 784 states have (on average 1.225765306122449) internal successors, (961), 796 states have internal predecessors, (961), 31 states have call successors, (31), 8 states have call predecessors, (31), 40 states have return successors, (177), 51 states have call predecessors, (177), 29 states have call successors, (177) [2022-01-31 17:09:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1169 transitions. [2022-01-31 17:09:42,684 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1169 transitions. Word has length 86 [2022-01-31 17:09:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:42,684 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1169 transitions. [2022-01-31 17:09:42,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:09:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1169 transitions. [2022-01-31 17:09:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 17:09:42,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:42,687 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:42,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:09:42,687 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:42,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1402648288, now seen corresponding path program 10 times [2022-01-31 17:09:42,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:42,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370000491] [2022-01-31 17:09:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:42,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:42,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:42,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:42,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:42,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:42,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:09:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:43,135 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370000491] [2022-01-31 17:09:43,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370000491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:43,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:43,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:09:43,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943928817] [2022-01-31 17:09:43,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:43,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:09:43,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:09:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:09:43,136 INFO L87 Difference]: Start difference. First operand 856 states and 1169 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:48,537 INFO L93 Difference]: Finished difference Result 1166 states and 1550 transitions. [2022-01-31 17:09:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:09:48,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-01-31 17:09:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:48,539 INFO L225 Difference]: With dead ends: 1166 [2022-01-31 17:09:48,539 INFO L226 Difference]: Without dead ends: 1043 [2022-01-31 17:09:48,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:09:48,540 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 298 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:48,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 177 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:09:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-01-31 17:09:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 853. [2022-01-31 17:09:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 781 states have (on average 1.2202304737516005) internal successors, (953), 793 states have internal predecessors, (953), 31 states have call successors, (31), 8 states have call predecessors, (31), 40 states have return successors, (177), 51 states have call predecessors, (177), 29 states have call successors, (177) [2022-01-31 17:09:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1161 transitions. [2022-01-31 17:09:51,212 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1161 transitions. Word has length 82 [2022-01-31 17:09:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:51,212 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1161 transitions. [2022-01-31 17:09:51,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1161 transitions. [2022-01-31 17:09:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:09:51,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:51,215 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:51,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:09:51,215 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:51,215 INFO L85 PathProgramCache]: Analyzing trace with hash -502591495, now seen corresponding path program 21 times [2022-01-31 17:09:51,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:51,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036036124] [2022-01-31 17:09:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:51,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:51,216 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:51,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:51,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:51,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:51,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:09:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:51,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:51,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036036124] [2022-01-31 17:09:51,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036036124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:51,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:51,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:09:51,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118957677] [2022-01-31 17:09:51,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:51,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:09:51,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:09:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:09:51,907 INFO L87 Difference]: Start difference. First operand 853 states and 1161 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:59,181 INFO L93 Difference]: Finished difference Result 1494 states and 1973 transitions. [2022-01-31 17:09:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:09:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-01-31 17:09:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:59,183 INFO L225 Difference]: With dead ends: 1494 [2022-01-31 17:09:59,183 INFO L226 Difference]: Without dead ends: 1295 [2022-01-31 17:09:59,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:09:59,185 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 274 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 3964 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:59,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 200 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3964 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:09:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2022-01-31 17:10:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 862. [2022-01-31 17:10:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 789 states have (on average 1.2179974651457541) internal successors, (961), 801 states have internal predecessors, (961), 31 states have call successors, (31), 8 states have call predecessors, (31), 41 states have return successors, (179), 52 states have call predecessors, (179), 29 states have call successors, (179) [2022-01-31 17:10:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1171 transitions. [2022-01-31 17:10:01,896 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1171 transitions. Word has length 83 [2022-01-31 17:10:01,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:01,896 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1171 transitions. [2022-01-31 17:10:01,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1171 transitions. [2022-01-31 17:10:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:10:01,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:01,899 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:01,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:10:01,899 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:01,899 INFO L85 PathProgramCache]: Analyzing trace with hash -934376593, now seen corresponding path program 22 times [2022-01-31 17:10:01,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:01,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755922032] [2022-01-31 17:10:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:01,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:01,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:01,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:01,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:02,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:10:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:02,574 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:02,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755922032] [2022-01-31 17:10:02,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [755922032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:02,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:02,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:10:02,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60094300] [2022-01-31 17:10:02,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:02,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:10:02,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:02,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:10:02,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:10:02,575 INFO L87 Difference]: Start difference. First operand 862 states and 1171 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:10,186 INFO L93 Difference]: Finished difference Result 1503 states and 1984 transitions. [2022-01-31 17:10:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:10:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-01-31 17:10:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:10,188 INFO L225 Difference]: With dead ends: 1503 [2022-01-31 17:10:10,188 INFO L226 Difference]: Without dead ends: 1304 [2022-01-31 17:10:10,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:10:10,190 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 280 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4536 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 4617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:10,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 218 Invalid, 4617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4536 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 17:10:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2022-01-31 17:10:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 869. [2022-01-31 17:10:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 795 states have (on average 1.2150943396226415) internal successors, (966), 807 states have internal predecessors, (966), 31 states have call successors, (31), 8 states have call predecessors, (31), 42 states have return successors, (181), 53 states have call predecessors, (181), 29 states have call successors, (181) [2022-01-31 17:10:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1178 transitions. [2022-01-31 17:10:12,942 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1178 transitions. Word has length 83 [2022-01-31 17:10:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:12,942 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1178 transitions. [2022-01-31 17:10:12,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1178 transitions. [2022-01-31 17:10:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:10:12,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:12,944 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:12,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:10:12,944 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1321487431, now seen corresponding path program 23 times [2022-01-31 17:10:12,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:12,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834512067] [2022-01-31 17:10:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:12,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:12,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:12,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:12,948 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:13,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:13,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:10:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:13,643 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:13,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834512067] [2022-01-31 17:10:13,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1834512067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:13,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:13,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:10:13,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452053244] [2022-01-31 17:10:13,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:13,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:10:13,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:10:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:10:13,644 INFO L87 Difference]: Start difference. First operand 869 states and 1178 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:21,137 INFO L93 Difference]: Finished difference Result 1506 states and 2006 transitions. [2022-01-31 17:10:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:10:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-01-31 17:10:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:21,139 INFO L225 Difference]: With dead ends: 1506 [2022-01-31 17:10:21,139 INFO L226 Difference]: Without dead ends: 1320 [2022-01-31 17:10:21,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=2712, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:10:21,141 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 303 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 4345 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 4434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 4345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:21,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 219 Invalid, 4434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 4345 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:10:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-01-31 17:10:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 876. [2022-01-31 17:10:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 801 states have (on average 1.2122347066167292) internal successors, (971), 813 states have internal predecessors, (971), 31 states have call successors, (31), 8 states have call predecessors, (31), 43 states have return successors, (183), 54 states have call predecessors, (183), 29 states have call successors, (183) [2022-01-31 17:10:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1185 transitions. [2022-01-31 17:10:23,899 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1185 transitions. Word has length 83 [2022-01-31 17:10:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:23,899 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1185 transitions. [2022-01-31 17:10:23,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1185 transitions. [2022-01-31 17:10:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:10:23,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:23,902 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:23,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:10:23,902 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1557244181, now seen corresponding path program 24 times [2022-01-31 17:10:23,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:23,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310915858] [2022-01-31 17:10:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:23,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:23,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:23,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:23,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:24,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:24,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:10:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:24,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:24,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310915858] [2022-01-31 17:10:24,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310915858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:24,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:24,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:10:24,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267340066] [2022-01-31 17:10:24,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:24,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:10:24,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:24,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:10:24,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:10:24,567 INFO L87 Difference]: Start difference. First operand 876 states and 1185 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:32,104 INFO L93 Difference]: Finished difference Result 1528 states and 2027 transitions. [2022-01-31 17:10:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:10:32,106 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-01-31 17:10:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:32,108 INFO L225 Difference]: With dead ends: 1528 [2022-01-31 17:10:32,108 INFO L226 Difference]: Without dead ends: 1336 [2022-01-31 17:10:32,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=2711, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:10:32,110 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 317 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4176 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 4271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:32,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 215 Invalid, 4271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4176 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:10:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-01-31 17:10:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 888. [2022-01-31 17:10:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 812 states have (on average 1.20935960591133) internal successors, (982), 824 states have internal predecessors, (982), 31 states have call successors, (31), 8 states have call predecessors, (31), 44 states have return successors, (185), 55 states have call predecessors, (185), 29 states have call successors, (185) [2022-01-31 17:10:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1198 transitions. [2022-01-31 17:10:34,912 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1198 transitions. Word has length 83 [2022-01-31 17:10:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:34,913 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1198 transitions. [2022-01-31 17:10:34,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1198 transitions. [2022-01-31 17:10:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:10:34,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:34,915 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:34,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:10:34,915 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:34,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2134474833, now seen corresponding path program 25 times [2022-01-31 17:10:34,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:34,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880744121] [2022-01-31 17:10:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:34,916 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:34,916 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:34,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:34,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:35,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:35,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:10:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:35,575 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:35,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880744121] [2022-01-31 17:10:35,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [880744121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:35,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:35,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:10:35,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972191468] [2022-01-31 17:10:35,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:35,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:10:35,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:35,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:10:35,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:10:35,576 INFO L87 Difference]: Start difference. First operand 888 states and 1198 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:43,339 INFO L93 Difference]: Finished difference Result 1382 states and 1837 transitions. [2022-01-31 17:10:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:10:43,340 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-01-31 17:10:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:43,347 INFO L225 Difference]: With dead ends: 1382 [2022-01-31 17:10:43,347 INFO L226 Difference]: Without dead ends: 1333 [2022-01-31 17:10:43,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=2711, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:10:43,349 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 308 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4489 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 4587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:43,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 199 Invalid, 4587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4489 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 17:10:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-31 17:10:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 888. [2022-01-31 17:10:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 812 states have (on average 1.20935960591133) internal successors, (982), 824 states have internal predecessors, (982), 31 states have call successors, (31), 8 states have call predecessors, (31), 44 states have return successors, (185), 55 states have call predecessors, (185), 29 states have call successors, (185) [2022-01-31 17:10:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1198 transitions. [2022-01-31 17:10:46,122 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1198 transitions. Word has length 83 [2022-01-31 17:10:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:46,122 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1198 transitions. [2022-01-31 17:10:46,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1198 transitions. [2022-01-31 17:10:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:10:46,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:46,124 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:46,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:10:46,125 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:46,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:46,125 INFO L85 PathProgramCache]: Analyzing trace with hash -736636679, now seen corresponding path program 26 times [2022-01-31 17:10:46,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:46,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633349499] [2022-01-31 17:10:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:46,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:46,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:46,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:46,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:46,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:10:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:46,792 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633349499] [2022-01-31 17:10:46,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [633349499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:46,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:46,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:10:46,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478991283] [2022-01-31 17:10:46,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:46,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:10:46,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:10:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:10:46,793 INFO L87 Difference]: Start difference. First operand 888 states and 1198 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:54,219 INFO L93 Difference]: Finished difference Result 1546 states and 2039 transitions. [2022-01-31 17:10:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:10:54,219 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-01-31 17:10:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:54,221 INFO L225 Difference]: With dead ends: 1546 [2022-01-31 17:10:54,221 INFO L226 Difference]: Without dead ends: 1348 [2022-01-31 17:10:54,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=2711, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:10:54,223 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 375 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3952 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:54,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 201 Invalid, 4081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3952 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:10:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-01-31 17:10:57,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 900. [2022-01-31 17:10:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 823 states have (on average 1.2065613608748482) internal successors, (993), 835 states have internal predecessors, (993), 31 states have call successors, (31), 8 states have call predecessors, (31), 45 states have return successors, (187), 56 states have call predecessors, (187), 29 states have call successors, (187) [2022-01-31 17:10:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1211 transitions. [2022-01-31 17:10:57,069 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1211 transitions. Word has length 83 [2022-01-31 17:10:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:57,070 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1211 transitions. [2022-01-31 17:10:57,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1211 transitions. [2022-01-31 17:10:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:10:57,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:57,072 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:57,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:10:57,072 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:57,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1313867331, now seen corresponding path program 27 times [2022-01-31 17:10:57,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:57,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182846890] [2022-01-31 17:10:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:57,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:57,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:57,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:57,076 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:57,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:10:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:57,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:57,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182846890] [2022-01-31 17:10:57,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [182846890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:57,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:57,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:10:57,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784280666] [2022-01-31 17:10:57,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:57,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:10:57,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:57,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:10:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:10:57,687 INFO L87 Difference]: Start difference. First operand 900 states and 1211 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:05,730 INFO L93 Difference]: Finished difference Result 1400 states and 1849 transitions. [2022-01-31 17:11:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:11:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-01-31 17:11:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:05,732 INFO L225 Difference]: With dead ends: 1400 [2022-01-31 17:11:05,732 INFO L226 Difference]: Without dead ends: 1351 [2022-01-31 17:11:05,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=2714, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:11:05,733 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 311 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 5119 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 5221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 5119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:05,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 243 Invalid, 5221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 5119 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 17:11:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-01-31 17:11:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 903. [2022-01-31 17:11:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 826 states have (on average 1.2070217917675545) internal successors, (997), 838 states have internal predecessors, (997), 31 states have call successors, (31), 8 states have call predecessors, (31), 45 states have return successors, (187), 56 states have call predecessors, (187), 29 states have call successors, (187) [2022-01-31 17:11:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1215 transitions. [2022-01-31 17:11:08,614 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1215 transitions. Word has length 83 [2022-01-31 17:11:08,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:08,614 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1215 transitions. [2022-01-31 17:11:08,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1215 transitions. [2022-01-31 17:11:08,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:11:08,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:08,617 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:08,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:11:08,617 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1268918137, now seen corresponding path program 28 times [2022-01-31 17:11:08,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:08,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51159316] [2022-01-31 17:11:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:08,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:08,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:08,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:08,623 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:09,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:09,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:11:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:09,357 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:09,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51159316] [2022-01-31 17:11:09,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [51159316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:09,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:09,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:11:09,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356211930] [2022-01-31 17:11:09,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:09,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:11:09,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:09,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:11:09,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:11:09,358 INFO L87 Difference]: Start difference. First operand 903 states and 1215 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:17,050 INFO L93 Difference]: Finished difference Result 1391 states and 1837 transitions. [2022-01-31 17:11:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:11:17,050 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-01-31 17:11:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:17,052 INFO L225 Difference]: With dead ends: 1391 [2022-01-31 17:11:17,052 INFO L226 Difference]: Without dead ends: 1342 [2022-01-31 17:11:17,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=2712, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:11:17,053 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 323 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4446 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 4446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:17,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 229 Invalid, 4549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 4446 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:11:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-01-31 17:11:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 900. [2022-01-31 17:11:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 823 states have (on average 1.2065613608748482) internal successors, (993), 835 states have internal predecessors, (993), 31 states have call successors, (31), 8 states have call predecessors, (31), 45 states have return successors, (187), 56 states have call predecessors, (187), 29 states have call successors, (187) [2022-01-31 17:11:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1211 transitions. [2022-01-31 17:11:19,903 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1211 transitions. Word has length 83 [2022-01-31 17:11:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:19,903 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1211 transitions. [2022-01-31 17:11:19,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1211 transitions. [2022-01-31 17:11:19,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:11:19,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:19,906 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:19,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:11:19,906 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:19,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2832681, now seen corresponding path program 6 times [2022-01-31 17:11:19,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:19,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358819484] [2022-01-31 17:11:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:19,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:19,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:19,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:19,909 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:20,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:11:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:20,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:20,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358819484] [2022-01-31 17:11:20,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358819484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:20,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:20,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:11:20,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062302788] [2022-01-31 17:11:20,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:20,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:11:20,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:20,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:11:20,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:11:20,490 INFO L87 Difference]: Start difference. First operand 900 states and 1211 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:37,204 INFO L93 Difference]: Finished difference Result 2351 states and 3018 transitions. [2022-01-31 17:11:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:11:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (4), 3 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 83 [2022-01-31 17:11:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:37,209 INFO L225 Difference]: With dead ends: 2351 [2022-01-31 17:11:37,209 INFO L226 Difference]: Without dead ends: 2307 [2022-01-31 17:11:37,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=554, Invalid=4276, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:11:37,210 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 544 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5943 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 6200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 5943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:37,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 325 Invalid, 6200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 5943 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 17:11:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2022-01-31 17:11:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 881. [2022-01-31 17:11:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 805 states have (on average 1.2111801242236024) internal successors, (975), 817 states have internal predecessors, (975), 30 states have call successors, (30), 8 states have call predecessors, (30), 45 states have return successors, (174), 55 states have call predecessors, (174), 28 states have call successors, (174) [2022-01-31 17:11:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1179 transitions. [2022-01-31 17:11:40,084 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1179 transitions. Word has length 83 [2022-01-31 17:11:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:40,084 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 1179 transitions. [2022-01-31 17:11:40,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1179 transitions. [2022-01-31 17:11:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 17:11:40,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:40,087 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:40,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:11:40,087 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:40,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:40,087 INFO L85 PathProgramCache]: Analyzing trace with hash -342407209, now seen corresponding path program 7 times [2022-01-31 17:11:40,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:40,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663338791] [2022-01-31 17:11:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:40,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:40,088 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:40,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:40,090 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:40,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:40,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:11:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:40,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:40,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663338791] [2022-01-31 17:11:40,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [663338791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:40,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:40,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:11:40,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166545950] [2022-01-31 17:11:40,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:40,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:11:40,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:40,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:11:40,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:11:40,281 INFO L87 Difference]: Start difference. First operand 881 states and 1179 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:11:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:43,972 INFO L93 Difference]: Finished difference Result 902 states and 1205 transitions. [2022-01-31 17:11:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:11:43,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 84 [2022-01-31 17:11:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:43,974 INFO L225 Difference]: With dead ends: 902 [2022-01-31 17:11:43,974 INFO L226 Difference]: Without dead ends: 893 [2022-01-31 17:11:43,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:11:43,976 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 117 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:43,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 175 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1984 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:11:43,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-31 17:11:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 887. [2022-01-31 17:11:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 811 states have (on average 1.2120838471023427) internal successors, (983), 823 states have internal predecessors, (983), 30 states have call successors, (30), 8 states have call predecessors, (30), 45 states have return successors, (174), 55 states have call predecessors, (174), 28 states have call successors, (174) [2022-01-31 17:11:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1187 transitions. [2022-01-31 17:11:46,849 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1187 transitions. Word has length 84 [2022-01-31 17:11:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:46,849 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1187 transitions. [2022-01-31 17:11:46,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:11:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1187 transitions. [2022-01-31 17:11:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 17:11:46,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:46,851 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:46,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:11:46,851 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:46,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:46,852 INFO L85 PathProgramCache]: Analyzing trace with hash 958647415, now seen corresponding path program 10 times [2022-01-31 17:11:46,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:46,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368793072] [2022-01-31 17:11:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:46,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:46,853 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:46,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:46,855 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:48,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:48,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:11:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:49,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 17:11:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:49,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 17:11:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:49,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 17:11:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:49,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 17:11:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 17:11:49,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368793072] [2022-01-31 17:11:49,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368793072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:49,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:49,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:11:49,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331530476] [2022-01-31 17:11:49,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:49,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:11:49,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:11:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:11:49,514 INFO L87 Difference]: Start difference. First operand 887 states and 1187 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:11:52,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 17:12:14,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:14,189 INFO L93 Difference]: Finished difference Result 1185 states and 1547 transitions. [2022-01-31 17:12:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:12:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 88 [2022-01-31 17:12:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:14,191 INFO L225 Difference]: With dead ends: 1185 [2022-01-31 17:12:14,191 INFO L226 Difference]: Without dead ends: 1070 [2022-01-31 17:12:14,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:12:14,193 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 291 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:14,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 139 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time] [2022-01-31 17:12:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-01-31 17:12:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 875. [2022-01-31 17:12:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 805 states have (on average 1.208695652173913) internal successors, (973), 811 states have internal predecessors, (973), 27 states have call successors, (27), 8 states have call predecessors, (27), 42 states have return successors, (135), 55 states have call predecessors, (135), 25 states have call successors, (135) [2022-01-31 17:12:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1135 transitions. [2022-01-31 17:12:17,138 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1135 transitions. Word has length 88 [2022-01-31 17:12:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:17,138 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1135 transitions. [2022-01-31 17:12:17,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 17:12:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1135 transitions. [2022-01-31 17:12:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:12:17,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:17,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:17,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:12:17,140 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1066712479, now seen corresponding path program 11 times [2022-01-31 17:12:17,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:17,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796191560] [2022-01-31 17:12:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:17,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:17,142 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:17,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:17,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:17,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:17,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:12:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:17,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 17:12:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 17:12:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:17,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 17:12:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:17,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 17:12:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 17:12:17,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:17,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796191560] [2022-01-31 17:12:17,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [796191560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:17,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:17,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:12:17,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903257629] [2022-01-31 17:12:17,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:17,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:12:17,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:12:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:12:17,522 INFO L87 Difference]: Start difference. First operand 875 states and 1135 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:12:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:22,649 INFO L93 Difference]: Finished difference Result 1141 states and 1486 transitions. [2022-01-31 17:12:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:12:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 89 [2022-01-31 17:12:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:22,651 INFO L225 Difference]: With dead ends: 1141 [2022-01-31 17:12:22,651 INFO L226 Difference]: Without dead ends: 1107 [2022-01-31 17:12:22,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:12:22,652 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 187 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:22,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 128 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:12:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-01-31 17:12:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 893. [2022-01-31 17:12:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 818 states have (on average 1.2053789731051345) internal successors, (986), 826 states have internal predecessors, (986), 29 states have call successors, (29), 8 states have call predecessors, (29), 45 states have return successors, (152), 58 states have call predecessors, (152), 27 states have call successors, (152) [2022-01-31 17:12:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1167 transitions. [2022-01-31 17:12:25,766 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1167 transitions. Word has length 89 [2022-01-31 17:12:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:25,766 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1167 transitions. [2022-01-31 17:12:25,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:12:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1167 transitions. [2022-01-31 17:12:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:12:25,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:25,768 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:25,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:12:25,768 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2109135958, now seen corresponding path program 11 times [2022-01-31 17:12:25,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:25,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650044788] [2022-01-31 17:12:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:25,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:25,770 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:25,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:25,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:26,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:26,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:12:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:26,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:26,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650044788] [2022-01-31 17:12:26,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [650044788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:26,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:26,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:12:26,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607433235] [2022-01-31 17:12:26,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:26,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:12:26,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:12:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:12:26,989 INFO L87 Difference]: Start difference. First operand 893 states and 1167 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:42,852 INFO L93 Difference]: Finished difference Result 1949 states and 2507 transitions. [2022-01-31 17:12:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:12:42,853 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-01-31 17:12:42,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:42,856 INFO L225 Difference]: With dead ends: 1949 [2022-01-31 17:12:42,856 INFO L226 Difference]: Without dead ends: 1811 [2022-01-31 17:12:42,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=272, Invalid=3388, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:12:42,857 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 599 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 6579 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 6830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 6579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:42,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 297 Invalid, 6830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 6579 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-01-31 17:12:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-01-31 17:12:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 930. [2022-01-31 17:12:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 855 states have (on average 1.2) internal successors, (1026), 858 states have internal predecessors, (1026), 29 states have call successors, (29), 8 states have call predecessors, (29), 45 states have return successors, (146), 63 states have call predecessors, (146), 27 states have call successors, (146) [2022-01-31 17:12:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1201 transitions. [2022-01-31 17:12:46,237 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1201 transitions. Word has length 85 [2022-01-31 17:12:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:46,237 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1201 transitions. [2022-01-31 17:12:46,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1201 transitions. [2022-01-31 17:12:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:12:46,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:46,239 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:46,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:12:46,240 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1677251339, now seen corresponding path program 7 times [2022-01-31 17:12:46,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:46,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824523061] [2022-01-31 17:12:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:46,241 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:46,241 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:46,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:46,243 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:46,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:46,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 17:12:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:46,756 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:46,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824523061] [2022-01-31 17:12:46,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824523061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:46,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:46,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:12:46,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925549362] [2022-01-31 17:12:46,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:46,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:12:46,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:46,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:12:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:12:46,758 INFO L87 Difference]: Start difference. First operand 930 states and 1201 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:03,085 INFO L93 Difference]: Finished difference Result 2462 states and 3133 transitions. [2022-01-31 17:13:03,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:13:03,086 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (4), 3 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 [2022-01-31 17:13:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:03,090 INFO L225 Difference]: With dead ends: 2462 [2022-01-31 17:13:03,090 INFO L226 Difference]: Without dead ends: 2454 [2022-01-31 17:13:03,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=426, Invalid=3996, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:13:03,092 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 654 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 4910 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 5179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 4910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:03,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 289 Invalid, 5179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 4910 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 17:13:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-01-31 17:13:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 912. [2022-01-31 17:13:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 837 states have (on average 1.1995221027479093) internal successors, (1004), 841 states have internal predecessors, (1004), 29 states have call successors, (29), 8 states have call predecessors, (29), 45 states have return successors, (146), 62 states have call predecessors, (146), 27 states have call successors, (146) [2022-01-31 17:13:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1179 transitions. [2022-01-31 17:13:06,423 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1179 transitions. Word has length 85 [2022-01-31 17:13:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:06,423 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1179 transitions. [2022-01-31 17:13:06,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1179 transitions. [2022-01-31 17:13:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 17:13:06,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:06,425 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:06,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:13:06,425 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash 220168364, now seen corresponding path program 5 times [2022-01-31 17:13:06,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:06,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588693510] [2022-01-31 17:13:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:06,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:06,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:06,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:06,429 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:06,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:06,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:13:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:06,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 17:13:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:06,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 17:13:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:06,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 17:13:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:06,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 17:13:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 17:13:06,766 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:06,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588693510] [2022-01-31 17:13:06,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [588693510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:06,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:06,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:13:06,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700685839] [2022-01-31 17:13:06,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:06,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:13:06,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:13:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:13:06,767 INFO L87 Difference]: Start difference. First operand 912 states and 1179 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:13:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:11,829 INFO L93 Difference]: Finished difference Result 1141 states and 1467 transitions. [2022-01-31 17:13:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:13:11,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 90 [2022-01-31 17:13:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:11,831 INFO L225 Difference]: With dead ends: 1141 [2022-01-31 17:13:11,831 INFO L226 Difference]: Without dead ends: 1102 [2022-01-31 17:13:11,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:13:11,832 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 142 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:11,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 133 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:13:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-01-31 17:13:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 912. [2022-01-31 17:13:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 837 states have (on average 1.1983273596176822) internal successors, (1003), 841 states have internal predecessors, (1003), 29 states have call successors, (29), 8 states have call predecessors, (29), 45 states have return successors, (146), 62 states have call predecessors, (146), 27 states have call successors, (146) [2022-01-31 17:13:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1178 transitions. [2022-01-31 17:13:15,189 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1178 transitions. Word has length 90 [2022-01-31 17:13:15,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:15,189 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1178 transitions. [2022-01-31 17:13:15,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:13:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1178 transitions. [2022-01-31 17:13:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 17:13:15,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:15,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:15,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:13:15,191 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -837387426, now seen corresponding path program 6 times [2022-01-31 17:13:15,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:15,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134603961] [2022-01-31 17:13:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:15,192 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:15,192 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:15,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:15,195 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:15,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:15,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:13:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 17:13:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:15,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 17:13:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:15,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 17:13:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:15,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 17:13:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 17:13:15,561 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134603961] [2022-01-31 17:13:15,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [134603961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:15,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:15,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:13:15,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7306498] [2022-01-31 17:13:15,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:15,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:13:15,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:13:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:13:15,562 INFO L87 Difference]: Start difference. First operand 912 states and 1178 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:13:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:22,440 INFO L93 Difference]: Finished difference Result 1231 states and 1584 transitions. [2022-01-31 17:13:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:13:22,440 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 90 [2022-01-31 17:13:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:22,442 INFO L225 Difference]: With dead ends: 1231 [2022-01-31 17:13:22,442 INFO L226 Difference]: Without dead ends: 1229 [2022-01-31 17:13:22,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=1951, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:13:22,443 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 240 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 3154 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:22,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 194 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3154 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:13:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-01-31 17:13:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 937. [2022-01-31 17:13:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 857 states have (on average 1.1948658109684946) internal successors, (1024), 862 states have internal predecessors, (1024), 33 states have call successors, (33), 9 states have call predecessors, (33), 46 states have return successors, (150), 65 states have call predecessors, (150), 31 states have call successors, (150) [2022-01-31 17:13:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1207 transitions. [2022-01-31 17:13:25,967 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1207 transitions. Word has length 90 [2022-01-31 17:13:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:25,967 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1207 transitions. [2022-01-31 17:13:25,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:13:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1207 transitions. [2022-01-31 17:13:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 17:13:25,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:25,969 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:25,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:13:25,969 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1993720721, now seen corresponding path program 29 times [2022-01-31 17:13:25,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:25,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845803250] [2022-01-31 17:13:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:25,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:25,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:25,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:25,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:26,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:26,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:13:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:26,389 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:26,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845803250] [2022-01-31 17:13:26,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845803250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:26,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:26,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:13:26,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951313460] [2022-01-31 17:13:26,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:26,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:13:26,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:26,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:13:26,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:13:26,390 INFO L87 Difference]: Start difference. First operand 937 states and 1207 transitions. Second operand has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:38,628 INFO L93 Difference]: Finished difference Result 2352 states and 3068 transitions. [2022-01-31 17:13:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:13:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 86 [2022-01-31 17:13:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:38,650 INFO L225 Difference]: With dead ends: 2352 [2022-01-31 17:13:38,650 INFO L226 Difference]: Without dead ends: 1953 [2022-01-31 17:13:38,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:13:38,652 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 328 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3883 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 4008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:38,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 232 Invalid, 4008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3883 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:13:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-01-31 17:13:42,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 954. [2022-01-31 17:13:42,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 868 states have (on average 1.195852534562212) internal successors, (1038), 879 states have internal predecessors, (1038), 35 states have call successors, (35), 9 states have call predecessors, (35), 50 states have return successors, (222), 65 states have call predecessors, (222), 33 states have call successors, (222) [2022-01-31 17:13:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1295 transitions. [2022-01-31 17:13:42,298 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1295 transitions. Word has length 86 [2022-01-31 17:13:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:42,298 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1295 transitions. [2022-01-31 17:13:42,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:42,298 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1295 transitions. [2022-01-31 17:13:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:13:42,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:42,300 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:42,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:13:42,301 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash -776498749, now seen corresponding path program 8 times [2022-01-31 17:13:42,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:42,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193527002] [2022-01-31 17:13:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:42,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:42,302 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:42,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:42,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:42,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:42,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:13:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:42,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:42,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193527002] [2022-01-31 17:13:42,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193527002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:42,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:42,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:13:42,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747921879] [2022-01-31 17:13:42,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:42,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:13:42,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:13:42,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:13:42,501 INFO L87 Difference]: Start difference. First operand 954 states and 1295 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:13:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:47,093 INFO L93 Difference]: Finished difference Result 974 states and 1320 transitions. [2022-01-31 17:13:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:13:47,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 87 [2022-01-31 17:13:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:47,095 INFO L225 Difference]: With dead ends: 974 [2022-01-31 17:13:47,095 INFO L226 Difference]: Without dead ends: 965 [2022-01-31 17:13:47,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:13:47,096 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 121 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:47,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 182 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:13:47,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-01-31 17:13:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 960. [2022-01-31 17:13:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 874 states have (on average 1.196796338672769) internal successors, (1046), 885 states have internal predecessors, (1046), 35 states have call successors, (35), 9 states have call predecessors, (35), 50 states have return successors, (222), 65 states have call predecessors, (222), 33 states have call successors, (222) [2022-01-31 17:13:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1303 transitions. [2022-01-31 17:13:50,766 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1303 transitions. Word has length 87 [2022-01-31 17:13:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:50,766 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1303 transitions. [2022-01-31 17:13:50,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:13:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1303 transitions. [2022-01-31 17:13:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:13:50,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:50,769 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:50,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:13:50,769 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash 511552136, now seen corresponding path program 12 times [2022-01-31 17:13:50,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:50,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996173974] [2022-01-31 17:13:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:50,770 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:50,770 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:50,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:50,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:51,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:51,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 17:13:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:51,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:51,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996173974] [2022-01-31 17:13:51,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [996173974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:51,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:51,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:13:51,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471958298] [2022-01-31 17:13:51,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:51,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:13:51,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:51,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:13:51,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:13:51,011 INFO L87 Difference]: Start difference. First operand 960 states and 1303 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:06,456 INFO L93 Difference]: Finished difference Result 2217 states and 2921 transitions. [2022-01-31 17:14:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:14:06,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 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 87 [2022-01-31 17:14:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:06,460 INFO L225 Difference]: With dead ends: 2217 [2022-01-31 17:14:06,460 INFO L226 Difference]: Without dead ends: 2208 [2022-01-31 17:14:06,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=370, Invalid=2386, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:14:06,462 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 430 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4109 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 4248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:06,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 276 Invalid, 4248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4109 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 17:14:06,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2022-01-31 17:14:10,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 966. [2022-01-31 17:14:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 880 states have (on average 1.1988636363636365) internal successors, (1055), 891 states have internal predecessors, (1055), 35 states have call successors, (35), 9 states have call predecessors, (35), 50 states have return successors, (222), 65 states have call predecessors, (222), 33 states have call successors, (222) [2022-01-31 17:14:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1312 transitions. [2022-01-31 17:14:10,130 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1312 transitions. Word has length 87 [2022-01-31 17:14:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:10,131 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1312 transitions. [2022-01-31 17:14:10,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1312 transitions. [2022-01-31 17:14:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:14:10,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:10,133 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:10,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:14:10,133 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:10,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:10,133 INFO L85 PathProgramCache]: Analyzing trace with hash -105814854, now seen corresponding path program 14 times [2022-01-31 17:14:10,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:10,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356106052] [2022-01-31 17:14:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:10,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:10,134 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:10,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:10,137 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:10,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:10,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 17:14:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:10,783 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356106052] [2022-01-31 17:14:10,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356106052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:10,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:10,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:14:10,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783507055] [2022-01-31 17:14:10,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:10,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:14:10,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:14:10,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:14:10,784 INFO L87 Difference]: Start difference. First operand 966 states and 1312 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:21,603 INFO L93 Difference]: Finished difference Result 1818 states and 2406 transitions. [2022-01-31 17:14:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:14:21,603 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 87 [2022-01-31 17:14:21,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:21,606 INFO L225 Difference]: With dead ends: 1818 [2022-01-31 17:14:21,606 INFO L226 Difference]: Without dead ends: 1710 [2022-01-31 17:14:21,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:14:21,608 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 277 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4484 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 4571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 4484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:21,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 232 Invalid, 4571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 4484 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:14:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-01-31 17:14:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1011. [2022-01-31 17:14:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 924 states have (on average 1.2002164502164503) internal successors, (1109), 934 states have internal predecessors, (1109), 35 states have call successors, (35), 9 states have call predecessors, (35), 51 states have return successors, (224), 67 states have call predecessors, (224), 33 states have call successors, (224) [2022-01-31 17:14:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1368 transitions. [2022-01-31 17:14:25,388 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1368 transitions. Word has length 87 [2022-01-31 17:14:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:25,389 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 1368 transitions. [2022-01-31 17:14:25,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1368 transitions. [2022-01-31 17:14:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 17:14:25,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:25,391 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:25,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:14:25,391 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:25,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1765581083, now seen corresponding path program 2 times [2022-01-31 17:14:25,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:25,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663200033] [2022-01-31 17:14:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:25,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:25,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:25,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:25,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:25,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:25,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:14:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:25,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 17:14:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:25,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 17:14:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:25,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 17:14:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:25,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 17:14:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 17:14:25,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:25,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663200033] [2022-01-31 17:14:25,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1663200033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:25,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:25,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:14:25,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959457640] [2022-01-31 17:14:25,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:25,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:14:25,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:14:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:14:25,774 INFO L87 Difference]: Start difference. First operand 1011 states and 1368 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:14:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:32,548 INFO L93 Difference]: Finished difference Result 1319 states and 1762 transitions. [2022-01-31 17:14:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:14:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 92 [2022-01-31 17:14:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:32,551 INFO L225 Difference]: With dead ends: 1319 [2022-01-31 17:14:32,551 INFO L226 Difference]: Without dead ends: 1317 [2022-01-31 17:14:32,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=1951, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:14:32,552 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 245 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:32,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 159 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:14:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-01-31 17:14:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1022. [2022-01-31 17:14:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 933 states have (on average 1.1982851018220793) internal successors, (1118), 943 states have internal predecessors, (1118), 36 states have call successors, (36), 10 states have call predecessors, (36), 52 states have return successors, (225), 68 states have call predecessors, (225), 34 states have call successors, (225) [2022-01-31 17:14:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1379 transitions. [2022-01-31 17:14:36,441 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1379 transitions. Word has length 92 [2022-01-31 17:14:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:36,441 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1379 transitions. [2022-01-31 17:14:36,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:14:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1379 transitions. [2022-01-31 17:14:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 17:14:36,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:36,443 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:36,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:14:36,443 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash 595241361, now seen corresponding path program 30 times [2022-01-31 17:14:36,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:36,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696006609] [2022-01-31 17:14:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:36,445 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:36,445 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:36,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:36,447 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:36,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:36,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 17:14:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:36,815 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696006609] [2022-01-31 17:14:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [696006609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:36,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:36,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:14:36,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736697534] [2022-01-31 17:14:36,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:36,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:14:36,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:36,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:14:36,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:14:36,816 INFO L87 Difference]: Start difference. First operand 1022 states and 1379 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)