/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 01:43:57,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 01:43:57,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 01:43:57,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 01:43:57,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 01:43:57,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 01:43:57,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 01:43:57,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 01:43:57,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 01:43:57,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 01:43:57,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 01:43:57,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 01:43:57,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 01:43:57,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 01:43:57,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 01:43:57,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 01:43:57,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 01:43:57,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 01:43:57,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 01:43:57,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 01:43:57,906 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 01:43:57,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 01:43:57,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 01:43:57,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 01:43:57,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 01:43:57,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 01:43:57,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 01:43:57,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 01:43:57,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 01:43:57,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 01:43:57,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 01:43:57,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 01:43:57,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 01:43:57,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 01:43:57,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 01:43:57,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 01:43:57,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 01:43:57,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 01:43:57,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 01:43:57,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 01:43:57,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 01:43:57,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 01:43:57,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-19 01:43:57,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 01:43:57,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 01:43:57,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 01:43:57,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 01:43:57,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 01:43:57,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 01:43:57,945 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 01:43:57,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 01:43:57,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 01:43:57,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:43:57,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 01:43:57,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 01:43:57,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 01:43:57,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 01:43:57,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 01:43:57,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 01:43:57,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-19 01:43:57,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-19 01:43:57,948 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-19 01:43:57,948 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 01:43:58,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 01:43:58,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 01:43:58,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 01:43:58,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 01:43:58,124 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 01:43:58,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-03-19 01:43:58,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da2d08c5d/8dca93bc651e4d92ae44f40249ecd830/FLAGc693f6ea5 [2022-03-19 01:43:58,552 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 01:43:58,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-03-19 01:43:58,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da2d08c5d/8dca93bc651e4d92ae44f40249ecd830/FLAGc693f6ea5 [2022-03-19 01:43:58,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da2d08c5d/8dca93bc651e4d92ae44f40249ecd830 [2022-03-19 01:43:58,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 01:43:58,574 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-19 01:43:58,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 01:43:58,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 01:43:58,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 01:43:58,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f46512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58, skipping insertion in model container [2022-03-19 01:43:58,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 01:43:58,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 01:43:58,799 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c[5283,5296] [2022-03-19 01:43:58,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:43:58,806 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 01:43:58,840 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c[5283,5296] [2022-03-19 01:43:58,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:43:58,852 INFO L208 MainTranslator]: Completed translation [2022-03-19 01:43:58,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58 WrapperNode [2022-03-19 01:43:58,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 01:43:58,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 01:43:58,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 01:43:58,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 01:43:58,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 01:43:58,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 01:43:58,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 01:43:58,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 01:43:58,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58" (1/1) ... [2022-03-19 01:43:58,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:43:58,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:43:58,898 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) [2022-03-19 01:43:58,903 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 [2022-03-19 01:43:58,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 01:43:58,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 01:43:58,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 01:43:58,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 01:43:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 01:43:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 01:43:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 01:43:58,984 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 01:43:58,985 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 01:43:59,174 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 01:43:59,179 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 01:43:59,179 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 01:43:59,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:43:59 BoogieIcfgContainer [2022-03-19 01:43:59,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 01:43:59,183 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-19 01:43:59,183 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-19 01:43:59,183 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-19 01:43:59,185 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:43:59" (1/1) ... [2022-03-19 01:43:59,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:43:59 BasicIcfg [2022-03-19 01:43:59,208 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-19 01:43:59,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 01:43:59,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 01:43:59,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 01:43:59,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 01:43:58" (1/4) ... [2022-03-19 01:43:59,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c52dee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:43:59, skipping insertion in model container [2022-03-19 01:43:59,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:58" (2/4) ... [2022-03-19 01:43:59,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c52dee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:43:59, skipping insertion in model container [2022-03-19 01:43:59,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:43:59" (3/4) ... [2022-03-19 01:43:59,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c52dee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:43:59, skipping insertion in model container [2022-03-19 01:43:59,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:43:59" (4/4) ... [2022-03-19 01:43:59,213 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.cqvasr [2022-03-19 01:43:59,222 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 01:43:59,222 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 01:43:59,253 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 01:43:59,264 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-19 01:43:59,264 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 01:43:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 01:43:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 01:43:59,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:59,279 INFO L500 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] [2022-03-19 01:43:59,279 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:59,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:59,282 INFO L85 PathProgramCache]: Analyzing trace with hash 267710119, now seen corresponding path program 1 times [2022-03-19 01:43:59,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:59,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548957281] [2022-03-19 01:43:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:59,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:59,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:59,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:59,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548957281] [2022-03-19 01:43:59,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548957281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:59,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:59,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:59,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99571121] [2022-03-19 01:43:59,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:59,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:59,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:59,455 INFO L87 Difference]: Start difference. First operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:59,589 INFO L93 Difference]: Finished difference Result 112 states and 199 transitions. [2022-03-19 01:43:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:59,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 01:43:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:59,597 INFO L225 Difference]: With dead ends: 112 [2022-03-19 01:43:59,598 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 01:43:59,600 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:59,605 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 242 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:59,605 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 113 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 01:43:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-03-19 01:43:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-03-19 01:43:59,633 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-03-19 01:43:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:59,634 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-03-19 01:43:59,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-03-19 01:43:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 01:43:59,635 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:59,635 INFO L500 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] [2022-03-19 01:43:59,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 01:43:59,635 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1621019816, now seen corresponding path program 1 times [2022-03-19 01:43:59,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:59,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144432214] [2022-03-19 01:43:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:59,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:59,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:59,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:59,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144432214] [2022-03-19 01:43:59,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144432214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:59,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:59,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014217256] [2022-03-19 01:43:59,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:59,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:59,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:59,691 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:59,776 INFO L93 Difference]: Finished difference Result 158 states and 293 transitions. [2022-03-19 01:43:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:59,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 01:43:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:59,777 INFO L225 Difference]: With dead ends: 158 [2022-03-19 01:43:59,777 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 01:43:59,778 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:59,779 INFO L912 BasicCegarLoop]: 120 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:59,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 127 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 01:43:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-03-19 01:43:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.879120879120879) internal successors, (171), 91 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-03-19 01:43:59,787 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-03-19 01:43:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:59,787 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-03-19 01:43:59,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-03-19 01:43:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 01:43:59,788 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:59,788 INFO L500 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] [2022-03-19 01:43:59,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 01:43:59,788 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash -290888810, now seen corresponding path program 1 times [2022-03-19 01:43:59,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:59,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476432087] [2022-03-19 01:43:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:59,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:59,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:59,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:59,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476432087] [2022-03-19 01:43:59,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476432087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:59,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:59,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:59,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999791678] [2022-03-19 01:43:59,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:59,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:59,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:59,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:59,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:59,848 INFO L87 Difference]: Start difference. First operand 95 states and 174 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:59,990 INFO L93 Difference]: Finished difference Result 145 states and 262 transitions. [2022-03-19 01:43:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:59,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 01:43:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:59,994 INFO L225 Difference]: With dead ends: 145 [2022-03-19 01:43:59,994 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 01:43:59,995 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:00,000 INFO L912 BasicCegarLoop]: 146 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:00,002 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 153 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 01:44:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-03-19 01:44:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-03-19 01:44:00,010 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-03-19 01:44:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:00,010 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-03-19 01:44:00,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-03-19 01:44:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 01:44:00,011 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:00,012 INFO L500 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] [2022-03-19 01:44:00,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 01:44:00,012 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1287961163, now seen corresponding path program 1 times [2022-03-19 01:44:00,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:00,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371879787] [2022-03-19 01:44:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:00,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:00,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371879787] [2022-03-19 01:44:00,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371879787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:00,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:00,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:00,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694548608] [2022-03-19 01:44:00,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:00,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:00,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:00,079 INFO L87 Difference]: Start difference. First operand 98 states and 176 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:00,197 INFO L93 Difference]: Finished difference Result 185 states and 337 transitions. [2022-03-19 01:44:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:00,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 01:44:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:00,198 INFO L225 Difference]: With dead ends: 185 [2022-03-19 01:44:00,198 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 01:44:00,199 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:00,199 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 229 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:00,200 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 101 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 01:44:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2022-03-19 01:44:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.84) internal successors, (230), 125 states have internal predecessors, (230), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 233 transitions. [2022-03-19 01:44:00,215 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 233 transitions. Word has length 26 [2022-03-19 01:44:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:00,215 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 233 transitions. [2022-03-19 01:44:00,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 233 transitions. [2022-03-19 01:44:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 01:44:00,216 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:00,216 INFO L500 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] [2022-03-19 01:44:00,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 01:44:00,217 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:00,217 INFO L85 PathProgramCache]: Analyzing trace with hash 65348534, now seen corresponding path program 1 times [2022-03-19 01:44:00,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:00,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589929647] [2022-03-19 01:44:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:00,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:00,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:00,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589929647] [2022-03-19 01:44:00,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589929647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:00,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:00,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363550559] [2022-03-19 01:44:00,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:00,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:00,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:00,271 INFO L87 Difference]: Start difference. First operand 129 states and 233 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:00,353 INFO L93 Difference]: Finished difference Result 305 states and 559 transitions. [2022-03-19 01:44:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:00,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 01:44:00,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:00,354 INFO L225 Difference]: With dead ends: 305 [2022-03-19 01:44:00,354 INFO L226 Difference]: Without dead ends: 185 [2022-03-19 01:44:00,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:00,355 INFO L912 BasicCegarLoop]: 122 mSDtfsCounter, 202 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:00,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 129 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-19 01:44:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-03-19 01:44:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8324022346368716) internal successors, (328), 179 states have internal predecessors, (328), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-03-19 01:44:00,363 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-03-19 01:44:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:00,363 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-03-19 01:44:00,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-03-19 01:44:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 01:44:00,364 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:00,364 INFO L500 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] [2022-03-19 01:44:00,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 01:44:00,365 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:00,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:00,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1272058172, now seen corresponding path program 1 times [2022-03-19 01:44:00,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:00,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504299443] [2022-03-19 01:44:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:00,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:00,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504299443] [2022-03-19 01:44:00,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504299443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:00,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:00,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80601291] [2022-03-19 01:44:00,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:00,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:00,400 INFO L87 Difference]: Start difference. First operand 183 states and 331 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:00,472 INFO L93 Difference]: Finished difference Result 274 states and 494 transitions. [2022-03-19 01:44:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:00,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 01:44:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:00,473 INFO L225 Difference]: With dead ends: 274 [2022-03-19 01:44:00,473 INFO L226 Difference]: Without dead ends: 187 [2022-03-19 01:44:00,474 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:00,474 INFO L912 BasicCegarLoop]: 143 mSDtfsCounter, 182 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:00,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 150 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-19 01:44:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-03-19 01:44:00,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.8121546961325967) internal successors, (328), 181 states have internal predecessors, (328), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 331 transitions. [2022-03-19 01:44:00,483 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 331 transitions. Word has length 27 [2022-03-19 01:44:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:00,483 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 331 transitions. [2022-03-19 01:44:00,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 331 transitions. [2022-03-19 01:44:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 01:44:00,484 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:00,484 INFO L500 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] [2022-03-19 01:44:00,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 01:44:00,484 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2025836771, now seen corresponding path program 1 times [2022-03-19 01:44:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:00,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006936841] [2022-03-19 01:44:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:00,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:00,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006936841] [2022-03-19 01:44:00,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006936841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:00,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:00,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591249234] [2022-03-19 01:44:00,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:00,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:00,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:00,543 INFO L87 Difference]: Start difference. First operand 185 states and 331 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:00,620 INFO L93 Difference]: Finished difference Result 349 states and 633 transitions. [2022-03-19 01:44:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 01:44:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:00,622 INFO L225 Difference]: With dead ends: 349 [2022-03-19 01:44:00,622 INFO L226 Difference]: Without dead ends: 347 [2022-03-19 01:44:00,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:00,623 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 222 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:00,624 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-19 01:44:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 249. [2022-03-19 01:44:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 245 states have (on average 1.7959183673469388) internal successors, (440), 245 states have internal predecessors, (440), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 443 transitions. [2022-03-19 01:44:00,637 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 443 transitions. Word has length 27 [2022-03-19 01:44:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:00,638 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 443 transitions. [2022-03-19 01:44:00,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 443 transitions. [2022-03-19 01:44:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 01:44:00,643 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:00,643 INFO L500 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] [2022-03-19 01:44:00,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 01:44:00,643 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash -915820828, now seen corresponding path program 1 times [2022-03-19 01:44:00,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:00,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607296944] [2022-03-19 01:44:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:00,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:00,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607296944] [2022-03-19 01:44:00,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607296944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:00,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:00,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844195886] [2022-03-19 01:44:00,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:00,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:00,684 INFO L87 Difference]: Start difference. First operand 249 states and 443 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:00,766 INFO L93 Difference]: Finished difference Result 593 states and 1065 transitions. [2022-03-19 01:44:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:00,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 01:44:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:00,767 INFO L225 Difference]: With dead ends: 593 [2022-03-19 01:44:00,767 INFO L226 Difference]: Without dead ends: 355 [2022-03-19 01:44:00,770 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:00,771 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:00,772 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 131 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-19 01:44:00,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2022-03-19 01:44:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 349 states have (on average 1.7879656160458453) internal successors, (624), 349 states have internal predecessors, (624), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 627 transitions. [2022-03-19 01:44:00,779 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 627 transitions. Word has length 27 [2022-03-19 01:44:00,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:00,782 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 627 transitions. [2022-03-19 01:44:00,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 627 transitions. [2022-03-19 01:44:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 01:44:00,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:00,783 INFO L500 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] [2022-03-19 01:44:00,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 01:44:00,783 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1623537198, now seen corresponding path program 1 times [2022-03-19 01:44:00,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:00,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995098270] [2022-03-19 01:44:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:00,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:00,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995098270] [2022-03-19 01:44:00,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995098270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:00,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:00,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:00,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763229953] [2022-03-19 01:44:00,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:00,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:00,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:00,833 INFO L87 Difference]: Start difference. First operand 353 states and 627 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:00,914 INFO L93 Difference]: Finished difference Result 529 states and 937 transitions. [2022-03-19 01:44:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:00,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 01:44:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:00,917 INFO L225 Difference]: With dead ends: 529 [2022-03-19 01:44:00,917 INFO L226 Difference]: Without dead ends: 359 [2022-03-19 01:44:00,917 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:00,918 INFO L912 BasicCegarLoop]: 140 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:00,919 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 147 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-19 01:44:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-03-19 01:44:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.7677053824362605) internal successors, (624), 353 states have internal predecessors, (624), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 627 transitions. [2022-03-19 01:44:00,926 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 627 transitions. Word has length 28 [2022-03-19 01:44:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:00,928 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 627 transitions. [2022-03-19 01:44:00,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 627 transitions. [2022-03-19 01:44:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 01:44:00,930 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:00,930 INFO L500 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] [2022-03-19 01:44:00,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 01:44:00,931 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:00,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1674357745, now seen corresponding path program 1 times [2022-03-19 01:44:00,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:00,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495450851] [2022-03-19 01:44:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:00,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495450851] [2022-03-19 01:44:00,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495450851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:00,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:00,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:00,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002125477] [2022-03-19 01:44:00,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:00,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:00,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:00,985 INFO L87 Difference]: Start difference. First operand 357 states and 627 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:01,066 INFO L93 Difference]: Finished difference Result 669 states and 1193 transitions. [2022-03-19 01:44:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:01,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 01:44:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:01,083 INFO L225 Difference]: With dead ends: 669 [2022-03-19 01:44:01,083 INFO L226 Difference]: Without dead ends: 667 [2022-03-19 01:44:01,084 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:01,084 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:01,085 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 99 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-19 01:44:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-03-19 01:44:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.7402061855670103) internal successors, (844), 485 states have internal predecessors, (844), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 847 transitions. [2022-03-19 01:44:01,095 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 847 transitions. Word has length 28 [2022-03-19 01:44:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:01,096 INFO L478 AbstractCegarLoop]: Abstraction has 489 states and 847 transitions. [2022-03-19 01:44:01,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 847 transitions. [2022-03-19 01:44:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 01:44:01,097 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:01,097 INFO L500 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] [2022-03-19 01:44:01,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 01:44:01,097 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1267299854, now seen corresponding path program 1 times [2022-03-19 01:44:01,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:01,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76121849] [2022-03-19 01:44:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:01,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:01,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:01,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76121849] [2022-03-19 01:44:01,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76121849] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:01,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:01,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:01,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392274941] [2022-03-19 01:44:01,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:01,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:01,139 INFO L87 Difference]: Start difference. First operand 489 states and 847 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:01,221 INFO L93 Difference]: Finished difference Result 1165 states and 2033 transitions. [2022-03-19 01:44:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 01:44:01,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:01,224 INFO L225 Difference]: With dead ends: 1165 [2022-03-19 01:44:01,224 INFO L226 Difference]: Without dead ends: 691 [2022-03-19 01:44:01,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:01,225 INFO L912 BasicCegarLoop]: 126 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:01,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-19 01:44:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-03-19 01:44:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.7343065693430657) internal successors, (1188), 685 states have internal predecessors, (1188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1191 transitions. [2022-03-19 01:44:01,239 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1191 transitions. Word has length 28 [2022-03-19 01:44:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:01,239 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 1191 transitions. [2022-03-19 01:44:01,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1191 transitions. [2022-03-19 01:44:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 01:44:01,240 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:01,240 INFO L500 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] [2022-03-19 01:44:01,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 01:44:01,240 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash 365515008, now seen corresponding path program 1 times [2022-03-19 01:44:01,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:01,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533806134] [2022-03-19 01:44:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:01,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:01,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:01,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533806134] [2022-03-19 01:44:01,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533806134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:01,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:01,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:01,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122901805] [2022-03-19 01:44:01,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:01,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:01,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:01,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:01,283 INFO L87 Difference]: Start difference. First operand 689 states and 1191 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:01,370 INFO L93 Difference]: Finished difference Result 1033 states and 1781 transitions. [2022-03-19 01:44:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:01,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 01:44:01,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:01,372 INFO L225 Difference]: With dead ends: 1033 [2022-03-19 01:44:01,372 INFO L226 Difference]: Without dead ends: 699 [2022-03-19 01:44:01,373 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:01,374 INFO L912 BasicCegarLoop]: 137 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:01,374 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 144 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-03-19 01:44:01,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-03-19 01:44:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.7142857142857142) internal successors, (1188), 693 states have internal predecessors, (1188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1191 transitions. [2022-03-19 01:44:01,386 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1191 transitions. Word has length 29 [2022-03-19 01:44:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:01,387 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 1191 transitions. [2022-03-19 01:44:01,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1191 transitions. [2022-03-19 01:44:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 01:44:01,388 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:01,388 INFO L500 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] [2022-03-19 01:44:01,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 01:44:01,388 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:01,388 INFO L85 PathProgramCache]: Analyzing trace with hash -631557345, now seen corresponding path program 1 times [2022-03-19 01:44:01,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:01,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551128774] [2022-03-19 01:44:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:01,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:01,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551128774] [2022-03-19 01:44:01,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551128774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:01,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:01,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:01,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915197228] [2022-03-19 01:44:01,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:01,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:01,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:01,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:01,424 INFO L87 Difference]: Start difference. First operand 697 states and 1191 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:01,508 INFO L93 Difference]: Finished difference Result 1293 states and 2249 transitions. [2022-03-19 01:44:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 01:44:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:01,512 INFO L225 Difference]: With dead ends: 1293 [2022-03-19 01:44:01,512 INFO L226 Difference]: Without dead ends: 1291 [2022-03-19 01:44:01,513 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:01,514 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:01,514 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-03-19 01:44:01,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-03-19 01:44:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.6787564766839378) internal successors, (1620), 965 states have internal predecessors, (1620), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1623 transitions. [2022-03-19 01:44:01,534 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1623 transitions. Word has length 29 [2022-03-19 01:44:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:01,534 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1623 transitions. [2022-03-19 01:44:01,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1623 transitions. [2022-03-19 01:44:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 01:44:01,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:01,536 INFO L500 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] [2022-03-19 01:44:01,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-19 01:44:01,537 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash 721752352, now seen corresponding path program 1 times [2022-03-19 01:44:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:01,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10547916] [2022-03-19 01:44:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:01,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:01,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:01,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10547916] [2022-03-19 01:44:01,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10547916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:01,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:01,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411773046] [2022-03-19 01:44:01,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:01,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:01,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:01,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:01,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:01,571 INFO L87 Difference]: Start difference. First operand 969 states and 1623 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:01,653 INFO L93 Difference]: Finished difference Result 2301 states and 3881 transitions. [2022-03-19 01:44:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:01,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 01:44:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:01,657 INFO L225 Difference]: With dead ends: 2301 [2022-03-19 01:44:01,657 INFO L226 Difference]: Without dead ends: 1355 [2022-03-19 01:44:01,658 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:01,659 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:01,659 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 135 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-03-19 01:44:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-03-19 01:44:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.67531504818384) internal successors, (2260), 1349 states have internal predecessors, (2260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2263 transitions. [2022-03-19 01:44:01,682 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2263 transitions. Word has length 29 [2022-03-19 01:44:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:01,682 INFO L478 AbstractCegarLoop]: Abstraction has 1353 states and 2263 transitions. [2022-03-19 01:44:01,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2263 transitions. [2022-03-19 01:44:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 01:44:01,683 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:01,683 INFO L500 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] [2022-03-19 01:44:01,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-19 01:44:01,684 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1896591374, now seen corresponding path program 1 times [2022-03-19 01:44:01,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:01,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230579779] [2022-03-19 01:44:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:01,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:01,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:01,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230579779] [2022-03-19 01:44:01,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230579779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:01,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:01,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:01,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054123484] [2022-03-19 01:44:01,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:01,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:01,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:01,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:01,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:01,711 INFO L87 Difference]: Start difference. First operand 1353 states and 2263 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:01,790 INFO L93 Difference]: Finished difference Result 2029 states and 3385 transitions. [2022-03-19 01:44:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:01,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 01:44:01,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:01,793 INFO L225 Difference]: With dead ends: 2029 [2022-03-19 01:44:01,793 INFO L226 Difference]: Without dead ends: 1371 [2022-03-19 01:44:01,803 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:01,804 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:01,804 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 141 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:01,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-03-19 01:44:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-03-19 01:44:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1365 states have (on average 1.6556776556776556) internal successors, (2260), 1365 states have internal predecessors, (2260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2263 transitions. [2022-03-19 01:44:01,863 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2263 transitions. Word has length 30 [2022-03-19 01:44:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:01,863 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 2263 transitions. [2022-03-19 01:44:01,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2263 transitions. [2022-03-19 01:44:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 01:44:01,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:01,864 INFO L500 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] [2022-03-19 01:44:01,865 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-19 01:44:01,865 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:01,865 INFO L85 PathProgramCache]: Analyzing trace with hash 899519021, now seen corresponding path program 1 times [2022-03-19 01:44:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:01,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384986970] [2022-03-19 01:44:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:01,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:01,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384986970] [2022-03-19 01:44:01,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384986970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:01,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:01,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:01,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040906705] [2022-03-19 01:44:01,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:01,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:01,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:01,905 INFO L87 Difference]: Start difference. First operand 1369 states and 2263 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:01,988 INFO L93 Difference]: Finished difference Result 2509 states and 4233 transitions. [2022-03-19 01:44:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:01,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 01:44:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:01,995 INFO L225 Difference]: With dead ends: 2509 [2022-03-19 01:44:01,995 INFO L226 Difference]: Without dead ends: 2507 [2022-03-19 01:44:01,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:01,997 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 201 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:01,998 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:01,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-03-19 01:44:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-03-19 01:44:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.6145454545454545) internal successors, (3108), 1925 states have internal predecessors, (3108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3111 transitions. [2022-03-19 01:44:02,035 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3111 transitions. Word has length 30 [2022-03-19 01:44:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:02,036 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 3111 transitions. [2022-03-19 01:44:02,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3111 transitions. [2022-03-19 01:44:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 01:44:02,037 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:02,037 INFO L500 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] [2022-03-19 01:44:02,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-19 01:44:02,038 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2042138578, now seen corresponding path program 1 times [2022-03-19 01:44:02,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:02,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576891633] [2022-03-19 01:44:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:02,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:02,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:02,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576891633] [2022-03-19 01:44:02,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576891633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:02,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:02,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:02,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585191407] [2022-03-19 01:44:02,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:02,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:02,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:02,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:02,070 INFO L87 Difference]: Start difference. First operand 1929 states and 3111 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:02,209 INFO L93 Difference]: Finished difference Result 4557 states and 7401 transitions. [2022-03-19 01:44:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:02,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 01:44:02,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:02,216 INFO L225 Difference]: With dead ends: 4557 [2022-03-19 01:44:02,216 INFO L226 Difference]: Without dead ends: 2667 [2022-03-19 01:44:02,218 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:02,218 INFO L912 BasicCegarLoop]: 130 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:02,219 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 137 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-03-19 01:44:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-03-19 01:44:02,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2661 states have (on average 1.6129274708756107) internal successors, (4292), 2661 states have internal predecessors, (4292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4295 transitions. [2022-03-19 01:44:02,259 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4295 transitions. Word has length 30 [2022-03-19 01:44:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:02,260 INFO L478 AbstractCegarLoop]: Abstraction has 2665 states and 4295 transitions. [2022-03-19 01:44:02,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4295 transitions. [2022-03-19 01:44:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 01:44:02,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:02,261 INFO L500 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] [2022-03-19 01:44:02,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-19 01:44:02,262 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:02,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2115318588, now seen corresponding path program 1 times [2022-03-19 01:44:02,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:02,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410582602] [2022-03-19 01:44:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:02,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:02,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:02,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410582602] [2022-03-19 01:44:02,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410582602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:02,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:02,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:02,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493849054] [2022-03-19 01:44:02,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:02,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:02,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:02,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:02,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:02,290 INFO L87 Difference]: Start difference. First operand 2665 states and 4295 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:02,373 INFO L93 Difference]: Finished difference Result 3997 states and 6425 transitions. [2022-03-19 01:44:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:02,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 01:44:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:02,380 INFO L225 Difference]: With dead ends: 3997 [2022-03-19 01:44:02,380 INFO L226 Difference]: Without dead ends: 2699 [2022-03-19 01:44:02,382 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:02,382 INFO L912 BasicCegarLoop]: 131 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:02,382 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 138 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:44:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-03-19 01:44:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-03-19 01:44:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2693 states have (on average 1.5937616041589306) internal successors, (4292), 2693 states have internal predecessors, (4292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4295 transitions. [2022-03-19 01:44:02,424 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4295 transitions. Word has length 31 [2022-03-19 01:44:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:02,424 INFO L478 AbstractCegarLoop]: Abstraction has 2697 states and 4295 transitions. [2022-03-19 01:44:02,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4295 transitions. [2022-03-19 01:44:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 01:44:02,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:02,425 INFO L500 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] [2022-03-19 01:44:02,426 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-19 01:44:02,426 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:02,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1118246235, now seen corresponding path program 1 times [2022-03-19 01:44:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:02,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271873109] [2022-03-19 01:44:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:02,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:02,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:02,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271873109] [2022-03-19 01:44:02,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271873109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:02,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:02,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:02,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587063151] [2022-03-19 01:44:02,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:02,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:02,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:02,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:02,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:02,452 INFO L87 Difference]: Start difference. First operand 2697 states and 4295 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:02,559 INFO L93 Difference]: Finished difference Result 4877 states and 7945 transitions. [2022-03-19 01:44:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:02,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 01:44:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:02,571 INFO L225 Difference]: With dead ends: 4877 [2022-03-19 01:44:02,571 INFO L226 Difference]: Without dead ends: 4875 [2022-03-19 01:44:02,572 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:02,573 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:02,573 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-19 01:44:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-03-19 01:44:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3845 states have (on average 1.5490247074122236) internal successors, (5956), 3845 states have internal predecessors, (5956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5959 transitions. [2022-03-19 01:44:02,636 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5959 transitions. Word has length 31 [2022-03-19 01:44:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:02,636 INFO L478 AbstractCegarLoop]: Abstraction has 3849 states and 5959 transitions. [2022-03-19 01:44:02,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5959 transitions. [2022-03-19 01:44:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 01:44:02,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:02,639 INFO L500 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] [2022-03-19 01:44:02,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-19 01:44:02,639 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1823411364, now seen corresponding path program 1 times [2022-03-19 01:44:02,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:02,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283963764] [2022-03-19 01:44:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:02,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:02,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283963764] [2022-03-19 01:44:02,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283963764] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:02,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:02,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:02,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627569979] [2022-03-19 01:44:02,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:02,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:02,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:02,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:02,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:02,658 INFO L87 Difference]: Start difference. First operand 3849 states and 5959 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:02,757 INFO L93 Difference]: Finished difference Result 9037 states and 14089 transitions. [2022-03-19 01:44:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 01:44:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:02,780 INFO L225 Difference]: With dead ends: 9037 [2022-03-19 01:44:02,781 INFO L226 Difference]: Without dead ends: 5259 [2022-03-19 01:44:02,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:02,786 INFO L912 BasicCegarLoop]: 132 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:02,786 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 139 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-03-19 01:44:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-03-19 01:44:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5253 states have (on average 1.5480677707976394) internal successors, (8132), 5253 states have internal predecessors, (8132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8135 transitions. [2022-03-19 01:44:02,889 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8135 transitions. Word has length 31 [2022-03-19 01:44:02,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:02,889 INFO L478 AbstractCegarLoop]: Abstraction has 5257 states and 8135 transitions. [2022-03-19 01:44:02,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:02,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8135 transitions. [2022-03-19 01:44:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 01:44:02,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:02,895 INFO L500 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] [2022-03-19 01:44:02,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-19 01:44:02,895 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash 305927754, now seen corresponding path program 1 times [2022-03-19 01:44:02,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:02,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125346918] [2022-03-19 01:44:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:02,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:02,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:02,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125346918] [2022-03-19 01:44:02,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125346918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:02,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:02,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:02,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655250719] [2022-03-19 01:44:02,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:02,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:02,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:02,916 INFO L87 Difference]: Start difference. First operand 5257 states and 8135 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:03,043 INFO L93 Difference]: Finished difference Result 7885 states and 12169 transitions. [2022-03-19 01:44:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:03,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 01:44:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:03,051 INFO L225 Difference]: With dead ends: 7885 [2022-03-19 01:44:03,051 INFO L226 Difference]: Without dead ends: 5323 [2022-03-19 01:44:03,055 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:03,056 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:03,057 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 135 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-03-19 01:44:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-03-19 01:44:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5321 states, 5317 states have (on average 1.529433891292082) internal successors, (8132), 5317 states have internal predecessors, (8132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8135 transitions. [2022-03-19 01:44:03,143 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8135 transitions. Word has length 32 [2022-03-19 01:44:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:03,144 INFO L478 AbstractCegarLoop]: Abstraction has 5321 states and 8135 transitions. [2022-03-19 01:44:03,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8135 transitions. [2022-03-19 01:44:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 01:44:03,147 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:03,147 INFO L500 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] [2022-03-19 01:44:03,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-19 01:44:03,148 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -691144599, now seen corresponding path program 1 times [2022-03-19 01:44:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:03,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859768702] [2022-03-19 01:44:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:03,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:03,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:03,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859768702] [2022-03-19 01:44:03,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859768702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:03,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:03,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:03,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996969368] [2022-03-19 01:44:03,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:03,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:03,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:03,171 INFO L87 Difference]: Start difference. First operand 5321 states and 8135 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:03,279 INFO L93 Difference]: Finished difference Result 9485 states and 14857 transitions. [2022-03-19 01:44:03,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:03,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 01:44:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:03,291 INFO L225 Difference]: With dead ends: 9485 [2022-03-19 01:44:03,291 INFO L226 Difference]: Without dead ends: 9483 [2022-03-19 01:44:03,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:03,295 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:03,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:44:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-03-19 01:44:03,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-03-19 01:44:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7685 states have (on average 1.4828887443070917) internal successors, (11396), 7685 states have internal predecessors, (11396), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11399 transitions. [2022-03-19 01:44:03,455 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11399 transitions. Word has length 32 [2022-03-19 01:44:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:03,455 INFO L478 AbstractCegarLoop]: Abstraction has 7689 states and 11399 transitions. [2022-03-19 01:44:03,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,455 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11399 transitions. [2022-03-19 01:44:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 01:44:03,461 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:03,461 INFO L500 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] [2022-03-19 01:44:03,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-19 01:44:03,461 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:03,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:03,462 INFO L85 PathProgramCache]: Analyzing trace with hash 662165098, now seen corresponding path program 1 times [2022-03-19 01:44:03,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:03,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270716249] [2022-03-19 01:44:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:03,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:03,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:03,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:03,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270716249] [2022-03-19 01:44:03,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270716249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:03,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:03,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:03,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63293464] [2022-03-19 01:44:03,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:03,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:03,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:03,484 INFO L87 Difference]: Start difference. First operand 7689 states and 11399 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:03,616 INFO L93 Difference]: Finished difference Result 17933 states and 26761 transitions. [2022-03-19 01:44:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:03,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 01:44:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:03,629 INFO L225 Difference]: With dead ends: 17933 [2022-03-19 01:44:03,629 INFO L226 Difference]: Without dead ends: 10379 [2022-03-19 01:44:03,641 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:03,643 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:03,643 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 141 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:44:03,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-03-19 01:44:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-03-19 01:44:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 10373 states have (on average 1.4811529933481153) internal successors, (15364), 10373 states have internal predecessors, (15364), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15367 transitions. [2022-03-19 01:44:03,826 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15367 transitions. Word has length 32 [2022-03-19 01:44:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:03,826 INFO L478 AbstractCegarLoop]: Abstraction has 10377 states and 15367 transitions. [2022-03-19 01:44:03,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15367 transitions. [2022-03-19 01:44:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 01:44:03,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:03,833 INFO L500 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] [2022-03-19 01:44:03,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-19 01:44:03,833 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash 49386872, now seen corresponding path program 1 times [2022-03-19 01:44:03,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:03,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920811359] [2022-03-19 01:44:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:03,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:03,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:03,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920811359] [2022-03-19 01:44:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920811359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:03,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:03,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:03,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266671986] [2022-03-19 01:44:03,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:03,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:03,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:03,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:03,860 INFO L87 Difference]: Start difference. First operand 10377 states and 15367 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:03,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:03,992 INFO L93 Difference]: Finished difference Result 15565 states and 22985 transitions. [2022-03-19 01:44:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:03,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 01:44:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:04,006 INFO L225 Difference]: With dead ends: 15565 [2022-03-19 01:44:04,006 INFO L226 Difference]: Without dead ends: 10507 [2022-03-19 01:44:04,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:04,017 INFO L912 BasicCegarLoop]: 125 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:04,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 132 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-03-19 01:44:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-03-19 01:44:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10501 states have (on average 1.4630987524997618) internal successors, (15364), 10501 states have internal predecessors, (15364), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15367 transitions. [2022-03-19 01:44:04,218 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15367 transitions. Word has length 33 [2022-03-19 01:44:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:04,218 INFO L478 AbstractCegarLoop]: Abstraction has 10505 states and 15367 transitions. [2022-03-19 01:44:04,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15367 transitions. [2022-03-19 01:44:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 01:44:04,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:04,224 INFO L500 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] [2022-03-19 01:44:04,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-19 01:44:04,225 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash -947685481, now seen corresponding path program 1 times [2022-03-19 01:44:04,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:04,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092738580] [2022-03-19 01:44:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:04,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:04,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:04,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092738580] [2022-03-19 01:44:04,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092738580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:04,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:04,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:04,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437497031] [2022-03-19 01:44:04,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:04,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:04,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:04,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:04,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:04,266 INFO L87 Difference]: Start difference. First operand 10505 states and 15367 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:04,473 INFO L93 Difference]: Finished difference Result 18445 states and 27657 transitions. [2022-03-19 01:44:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 01:44:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:04,498 INFO L225 Difference]: With dead ends: 18445 [2022-03-19 01:44:04,498 INFO L226 Difference]: Without dead ends: 18443 [2022-03-19 01:44:04,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:04,505 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:04,508 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-03-19 01:44:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-03-19 01:44:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 15365 states have (on average 1.4164659941425317) internal successors, (21764), 15365 states have internal predecessors, (21764), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 21767 transitions. [2022-03-19 01:44:04,734 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 21767 transitions. Word has length 33 [2022-03-19 01:44:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:04,735 INFO L478 AbstractCegarLoop]: Abstraction has 15369 states and 21767 transitions. [2022-03-19 01:44:04,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 21767 transitions. [2022-03-19 01:44:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 01:44:04,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:04,747 INFO L500 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] [2022-03-19 01:44:04,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-19 01:44:04,747 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:04,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:04,747 INFO L85 PathProgramCache]: Analyzing trace with hash 405624216, now seen corresponding path program 1 times [2022-03-19 01:44:04,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:04,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110416119] [2022-03-19 01:44:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:04,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:04,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:04,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110416119] [2022-03-19 01:44:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110416119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:04,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:04,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673537754] [2022-03-19 01:44:04,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:04,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:04,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:04,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:04,769 INFO L87 Difference]: Start difference. First operand 15369 states and 21767 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:05,112 INFO L93 Difference]: Finished difference Result 35597 states and 50697 transitions. [2022-03-19 01:44:05,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:05,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 01:44:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:05,166 INFO L225 Difference]: With dead ends: 35597 [2022-03-19 01:44:05,166 INFO L226 Difference]: Without dead ends: 20491 [2022-03-19 01:44:05,233 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:05,234 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:05,235 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-03-19 01:44:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-03-19 01:44:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20485 states have (on average 1.4123505003661216) internal successors, (28932), 20485 states have internal predecessors, (28932), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 28935 transitions. [2022-03-19 01:44:05,582 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 28935 transitions. Word has length 33 [2022-03-19 01:44:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:05,582 INFO L478 AbstractCegarLoop]: Abstraction has 20489 states and 28935 transitions. [2022-03-19 01:44:05,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 28935 transitions. [2022-03-19 01:44:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 01:44:05,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:05,595 INFO L500 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] [2022-03-19 01:44:05,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-19 01:44:05,596 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:05,597 INFO L85 PathProgramCache]: Analyzing trace with hash 686554246, now seen corresponding path program 1 times [2022-03-19 01:44:05,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:05,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448964459] [2022-03-19 01:44:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:05,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:05,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:05,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:05,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448964459] [2022-03-19 01:44:05,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448964459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:05,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:05,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:05,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098907878] [2022-03-19 01:44:05,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:05,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:05,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:05,623 INFO L87 Difference]: Start difference. First operand 20489 states and 28935 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:06,058 INFO L93 Difference]: Finished difference Result 30733 states and 43273 transitions. [2022-03-19 01:44:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-19 01:44:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:06,085 INFO L225 Difference]: With dead ends: 30733 [2022-03-19 01:44:06,085 INFO L226 Difference]: Without dead ends: 20747 [2022-03-19 01:44:06,098 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:06,098 INFO L912 BasicCegarLoop]: 122 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:06,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 129 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-03-19 01:44:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-03-19 01:44:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20745 states, 20741 states have (on average 1.3949182778072418) internal successors, (28932), 20741 states have internal predecessors, (28932), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 28935 transitions. [2022-03-19 01:44:06,388 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 28935 transitions. Word has length 34 [2022-03-19 01:44:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:06,388 INFO L478 AbstractCegarLoop]: Abstraction has 20745 states and 28935 transitions. [2022-03-19 01:44:06,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 28935 transitions. [2022-03-19 01:44:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 01:44:06,401 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:06,401 INFO L500 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] [2022-03-19 01:44:06,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-19 01:44:06,401 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash -310518107, now seen corresponding path program 1 times [2022-03-19 01:44:06,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:06,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641191237] [2022-03-19 01:44:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:06,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:06,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:06,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:06,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641191237] [2022-03-19 01:44:06,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641191237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:06,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:06,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:06,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100031932] [2022-03-19 01:44:06,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:06,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:06,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:06,420 INFO L87 Difference]: Start difference. First operand 20745 states and 28935 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:06,828 INFO L93 Difference]: Finished difference Result 35853 states and 51209 transitions. [2022-03-19 01:44:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:06,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-19 01:44:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:06,881 INFO L225 Difference]: With dead ends: 35853 [2022-03-19 01:44:06,881 INFO L226 Difference]: Without dead ends: 35851 [2022-03-19 01:44:06,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:06,886 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:06,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 93 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:44:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35851 states. [2022-03-19 01:44:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35851 to 30729. [2022-03-19 01:44:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30729 states, 30725 states have (on average 1.3499104963384865) internal successors, (41476), 30725 states have internal predecessors, (41476), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30729 states to 30729 states and 41479 transitions. [2022-03-19 01:44:07,363 INFO L78 Accepts]: Start accepts. Automaton has 30729 states and 41479 transitions. Word has length 34 [2022-03-19 01:44:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:07,363 INFO L478 AbstractCegarLoop]: Abstraction has 30729 states and 41479 transitions. [2022-03-19 01:44:07,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 30729 states and 41479 transitions. [2022-03-19 01:44:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 01:44:07,385 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:07,386 INFO L500 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] [2022-03-19 01:44:07,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-19 01:44:07,386 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:07,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1042791590, now seen corresponding path program 1 times [2022-03-19 01:44:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:07,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111193744] [2022-03-19 01:44:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:07,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:07,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:07,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111193744] [2022-03-19 01:44:07,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111193744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:07,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:07,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236846825] [2022-03-19 01:44:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:07,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:07,410 INFO L87 Difference]: Start difference. First operand 30729 states and 41479 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:07,905 INFO L93 Difference]: Finished difference Result 70669 states and 95753 transitions. [2022-03-19 01:44:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-19 01:44:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:07,967 INFO L225 Difference]: With dead ends: 70669 [2022-03-19 01:44:07,967 INFO L226 Difference]: Without dead ends: 40459 [2022-03-19 01:44:07,999 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:08,000 INFO L912 BasicCegarLoop]: 138 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:08,000 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 145 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-03-19 01:44:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-03-19 01:44:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3417051887375473) internal successors, (54276), 40453 states have internal predecessors, (54276), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:08,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 54279 transitions. [2022-03-19 01:44:08,763 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 54279 transitions. Word has length 34 [2022-03-19 01:44:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:08,763 INFO L478 AbstractCegarLoop]: Abstraction has 40457 states and 54279 transitions. [2022-03-19 01:44:08,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 54279 transitions. [2022-03-19 01:44:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 01:44:08,793 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:08,793 INFO L500 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] [2022-03-19 01:44:08,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-19 01:44:08,793 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1036093516, now seen corresponding path program 1 times [2022-03-19 01:44:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:08,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889719593] [2022-03-19 01:44:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:08,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:08,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:08,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:08,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889719593] [2022-03-19 01:44:08,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889719593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:08,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:08,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:08,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477718252] [2022-03-19 01:44:08,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:08,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:08,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:08,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:08,813 INFO L87 Difference]: Start difference. First operand 40457 states and 54279 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:09,318 INFO L93 Difference]: Finished difference Result 60685 states and 81161 transitions. [2022-03-19 01:44:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 01:44:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:09,367 INFO L225 Difference]: With dead ends: 60685 [2022-03-19 01:44:09,368 INFO L226 Difference]: Without dead ends: 40971 [2022-03-19 01:44:09,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:09,390 INFO L912 BasicCegarLoop]: 119 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:09,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 126 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40971 states. [2022-03-19 01:44:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40971 to 40969. [2022-03-19 01:44:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40969 states, 40965 states have (on average 1.3249359209080922) internal successors, (54276), 40965 states have internal predecessors, (54276), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40969 states to 40969 states and 54279 transitions. [2022-03-19 01:44:10,074 INFO L78 Accepts]: Start accepts. Automaton has 40969 states and 54279 transitions. Word has length 35 [2022-03-19 01:44:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:10,074 INFO L478 AbstractCegarLoop]: Abstraction has 40969 states and 54279 transitions. [2022-03-19 01:44:10,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 40969 states and 54279 transitions. [2022-03-19 01:44:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 01:44:10,110 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:10,110 INFO L500 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] [2022-03-19 01:44:10,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-19 01:44:10,110 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:10,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2033165869, now seen corresponding path program 1 times [2022-03-19 01:44:10,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:10,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177537410] [2022-03-19 01:44:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:10,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:10,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:10,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:10,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177537410] [2022-03-19 01:44:10,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177537410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:10,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:10,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:10,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155553315] [2022-03-19 01:44:10,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:10,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:10,133 INFO L87 Difference]: Start difference. First operand 40969 states and 54279 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:10,781 INFO L93 Difference]: Finished difference Result 69645 states and 94217 transitions. [2022-03-19 01:44:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 01:44:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:10,859 INFO L225 Difference]: With dead ends: 69645 [2022-03-19 01:44:10,859 INFO L226 Difference]: Without dead ends: 69643 [2022-03-19 01:44:10,870 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:10,870 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:10,870 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69643 states. [2022-03-19 01:44:11,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69643 to 61449. [2022-03-19 01:44:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61449 states, 61445 states have (on average 1.283294002766702) internal successors, (78852), 61445 states have internal predecessors, (78852), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61449 states to 61449 states and 78855 transitions. [2022-03-19 01:44:11,826 INFO L78 Accepts]: Start accepts. Automaton has 61449 states and 78855 transitions. Word has length 35 [2022-03-19 01:44:11,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:11,826 INFO L478 AbstractCegarLoop]: Abstraction has 61449 states and 78855 transitions. [2022-03-19 01:44:11,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 61449 states and 78855 transitions. [2022-03-19 01:44:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 01:44:11,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:11,853 INFO L500 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] [2022-03-19 01:44:11,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-19 01:44:11,853 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash -679856172, now seen corresponding path program 1 times [2022-03-19 01:44:11,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:11,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955545197] [2022-03-19 01:44:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:11,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955545197] [2022-03-19 01:44:11,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955545197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:11,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:11,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118574479] [2022-03-19 01:44:11,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:11,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:11,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:11,871 INFO L87 Difference]: Start difference. First operand 61449 states and 78855 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:12,834 INFO L93 Difference]: Finished difference Result 140301 states and 180233 transitions. [2022-03-19 01:44:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 01:44:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:12,953 INFO L225 Difference]: With dead ends: 140301 [2022-03-19 01:44:12,954 INFO L226 Difference]: Without dead ends: 79883 [2022-03-19 01:44:12,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:12,998 INFO L912 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:12,998 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79883 states. [2022-03-19 01:44:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79883 to 79881. [2022-03-19 01:44:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79881 states, 79877 states have (on average 1.2692013971481153) internal successors, (101380), 79877 states have internal predecessors, (101380), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79881 states to 79881 states and 101383 transitions. [2022-03-19 01:44:14,201 INFO L78 Accepts]: Start accepts. Automaton has 79881 states and 101383 transitions. Word has length 35 [2022-03-19 01:44:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:14,201 INFO L478 AbstractCegarLoop]: Abstraction has 79881 states and 101383 transitions. [2022-03-19 01:44:14,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 79881 states and 101383 transitions. [2022-03-19 01:44:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 01:44:14,232 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:14,233 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:44:14,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-19 01:44:14,233 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1396400834, now seen corresponding path program 1 times [2022-03-19 01:44:14,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:14,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289954219] [2022-03-19 01:44:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:14,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:14,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:14,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289954219] [2022-03-19 01:44:14,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289954219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:14,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:14,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761042324] [2022-03-19 01:44:14,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:14,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:14,251 INFO L87 Difference]: Start difference. First operand 79881 states and 101383 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:15,204 INFO L93 Difference]: Finished difference Result 119821 states and 151561 transitions. [2022-03-19 01:44:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-19 01:44:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:15,299 INFO L225 Difference]: With dead ends: 119821 [2022-03-19 01:44:15,299 INFO L226 Difference]: Without dead ends: 80907 [2022-03-19 01:44:15,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:15,338 INFO L912 BasicCegarLoop]: 116 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:15,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 123 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-03-19 01:44:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-03-19 01:44:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80905 states, 80901 states have (on average 1.253136549610017) internal successors, (101380), 80901 states have internal predecessors, (101380), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 101383 transitions. [2022-03-19 01:44:16,648 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 101383 transitions. Word has length 36 [2022-03-19 01:44:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:16,648 INFO L478 AbstractCegarLoop]: Abstraction has 80905 states and 101383 transitions. [2022-03-19 01:44:16,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 101383 transitions. [2022-03-19 01:44:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 01:44:16,687 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:16,687 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:44:16,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-19 01:44:16,687 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash 399328481, now seen corresponding path program 1 times [2022-03-19 01:44:16,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:16,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625946149] [2022-03-19 01:44:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:16,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:16,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:16,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625946149] [2022-03-19 01:44:16,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625946149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:16,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:16,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:16,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825291018] [2022-03-19 01:44:16,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:16,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:16,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:16,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:16,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:16,738 INFO L87 Difference]: Start difference. First operand 80905 states and 101383 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:17,929 INFO L93 Difference]: Finished difference Result 135181 states and 172041 transitions. [2022-03-19 01:44:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-19 01:44:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:18,153 INFO L225 Difference]: With dead ends: 135181 [2022-03-19 01:44:18,153 INFO L226 Difference]: Without dead ends: 135179 [2022-03-19 01:44:18,183 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:18,184 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:18,185 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-03-19 01:44:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-03-19 01:44:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122889 states, 122885 states have (on average 1.2166497131464378) internal successors, (149508), 122885 states have internal predecessors, (149508), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 149511 transitions. [2022-03-19 01:44:20,006 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 149511 transitions. Word has length 36 [2022-03-19 01:44:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:20,006 INFO L478 AbstractCegarLoop]: Abstraction has 122889 states and 149511 transitions. [2022-03-19 01:44:20,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 149511 transitions. [2022-03-19 01:44:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 01:44:20,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:20,278 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:44:20,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-19 01:44:20,278 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1752638178, now seen corresponding path program 1 times [2022-03-19 01:44:20,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:20,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53523194] [2022-03-19 01:44:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:20,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:20,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:20,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:20,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53523194] [2022-03-19 01:44:20,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53523194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:20,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:20,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:20,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921423981] [2022-03-19 01:44:20,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:20,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:20,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:20,299 INFO L87 Difference]: Start difference. First operand 122889 states and 149511 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:21,982 INFO L93 Difference]: Finished difference Result 278541 states and 337929 transitions. [2022-03-19 01:44:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:21,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-19 01:44:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:22,214 INFO L225 Difference]: With dead ends: 278541 [2022-03-19 01:44:22,214 INFO L226 Difference]: Without dead ends: 157707 [2022-03-19 01:44:22,320 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:22,320 INFO L912 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:22,321 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 149 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states. [2022-03-19 01:44:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157707 to 157705. [2022-03-19 01:44:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157705 states, 157701 states have (on average 1.1947926772816913) internal successors, (188420), 157701 states have internal predecessors, (188420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157705 states to 157705 states and 188423 transitions. [2022-03-19 01:44:25,176 INFO L78 Accepts]: Start accepts. Automaton has 157705 states and 188423 transitions. Word has length 36 [2022-03-19 01:44:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:25,178 INFO L478 AbstractCegarLoop]: Abstraction has 157705 states and 188423 transitions. [2022-03-19 01:44:25,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 157705 states and 188423 transitions. [2022-03-19 01:44:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 01:44:25,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:25,262 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:44:25,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-19 01:44:25,262 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash -505685520, now seen corresponding path program 1 times [2022-03-19 01:44:25,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:25,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627736072] [2022-03-19 01:44:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:25,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:25,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:25,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627736072] [2022-03-19 01:44:25,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627736072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:25,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:25,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:25,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311818935] [2022-03-19 01:44:25,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:25,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:25,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:25,284 INFO L87 Difference]: Start difference. First operand 157705 states and 188423 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:26,894 INFO L93 Difference]: Finished difference Result 236557 states and 281609 transitions. [2022-03-19 01:44:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:26,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 01:44:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:27,096 INFO L225 Difference]: With dead ends: 236557 [2022-03-19 01:44:27,096 INFO L226 Difference]: Without dead ends: 159755 [2022-03-19 01:44:27,176 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:27,177 INFO L912 BasicCegarLoop]: 113 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:27,178 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159755 states. [2022-03-19 01:44:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159755 to 159753. [2022-03-19 01:44:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159753 states, 159749 states have (on average 1.179475301879824) internal successors, (188420), 159749 states have internal predecessors, (188420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159753 states to 159753 states and 188423 transitions. [2022-03-19 01:44:30,026 INFO L78 Accepts]: Start accepts. Automaton has 159753 states and 188423 transitions. Word has length 37 [2022-03-19 01:44:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:30,026 INFO L478 AbstractCegarLoop]: Abstraction has 159753 states and 188423 transitions. [2022-03-19 01:44:30,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 159753 states and 188423 transitions. [2022-03-19 01:44:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 01:44:30,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:30,119 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:44:30,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-19 01:44:30,119 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1502757873, now seen corresponding path program 1 times [2022-03-19 01:44:30,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:30,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542742582] [2022-03-19 01:44:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:30,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:30,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:30,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:30,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542742582] [2022-03-19 01:44:30,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542742582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:30,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:30,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:30,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061215] [2022-03-19 01:44:30,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:30,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:30,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:30,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:30,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:30,143 INFO L87 Difference]: Start difference. First operand 159753 states and 188423 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:32,473 INFO L93 Difference]: Finished difference Result 262157 states and 311305 transitions. [2022-03-19 01:44:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:32,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 01:44:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:32,862 INFO L225 Difference]: With dead ends: 262157 [2022-03-19 01:44:32,863 INFO L226 Difference]: Without dead ends: 262155 [2022-03-19 01:44:32,925 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:32,934 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:32,934 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262155 states. [2022-03-19 01:44:36,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262155 to 245769. [2022-03-19 01:44:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245769 states, 245765 states have (on average 1.1499928793766403) internal successors, (282628), 245765 states have internal predecessors, (282628), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245769 states to 245769 states and 282631 transitions. [2022-03-19 01:44:36,715 INFO L78 Accepts]: Start accepts. Automaton has 245769 states and 282631 transitions. Word has length 37 [2022-03-19 01:44:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:36,715 INFO L478 AbstractCegarLoop]: Abstraction has 245769 states and 282631 transitions. [2022-03-19 01:44:36,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 245769 states and 282631 transitions. [2022-03-19 01:44:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 01:44:37,147 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:37,148 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:44:37,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-19 01:44:37,148 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:37,148 INFO L85 PathProgramCache]: Analyzing trace with hash -149448176, now seen corresponding path program 1 times [2022-03-19 01:44:37,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:37,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98076634] [2022-03-19 01:44:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:37,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:37,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:37,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:37,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98076634] [2022-03-19 01:44:37,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98076634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:37,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:37,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:37,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35291832] [2022-03-19 01:44:37,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:37,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:37,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:37,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:37,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:37,171 INFO L87 Difference]: Start difference. First operand 245769 states and 282631 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:40,437 INFO L93 Difference]: Finished difference Result 552973 states and 630793 transitions. [2022-03-19 01:44:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:40,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 01:44:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:41,283 INFO L225 Difference]: With dead ends: 552973 [2022-03-19 01:44:41,283 INFO L226 Difference]: Without dead ends: 311307 [2022-03-19 01:44:41,433 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:41,435 INFO L912 BasicCegarLoop]: 144 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:41,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 151 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311307 states. [2022-03-19 01:44:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311307 to 311305. [2022-03-19 01:44:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311305 states, 311301 states have (on average 1.1184159382719618) internal successors, (348164), 311301 states have internal predecessors, (348164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311305 states to 311305 states and 348167 transitions. [2022-03-19 01:44:46,876 INFO L78 Accepts]: Start accepts. Automaton has 311305 states and 348167 transitions. Word has length 37 [2022-03-19 01:44:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:46,876 INFO L478 AbstractCegarLoop]: Abstraction has 311305 states and 348167 transitions. [2022-03-19 01:44:46,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 311305 states and 348167 transitions. [2022-03-19 01:44:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 01:44:47,375 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:47,375 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:44:47,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-19 01:44:47,376 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:47,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:47,376 INFO L85 PathProgramCache]: Analyzing trace with hash 659179774, now seen corresponding path program 1 times [2022-03-19 01:44:47,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:47,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075784032] [2022-03-19 01:44:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:47,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:47,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:47,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075784032] [2022-03-19 01:44:47,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075784032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:47,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:47,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:47,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031995314] [2022-03-19 01:44:47,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:47,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:47,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:47,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:47,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:47,392 INFO L87 Difference]: Start difference. First operand 311305 states and 348167 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:50,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:44:50,501 INFO L93 Difference]: Finished difference Result 466957 states and 520201 transitions. [2022-03-19 01:44:50,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:44:50,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-19 01:44:50,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:44:50,908 INFO L225 Difference]: With dead ends: 466957 [2022-03-19 01:44:50,908 INFO L226 Difference]: Without dead ends: 315403 [2022-03-19 01:44:51,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:44:51,006 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 171 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:44:51,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 117 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:44:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315403 states. [2022-03-19 01:44:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315403 to 315401. [2022-03-19 01:44:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315401 states, 315397 states have (on average 1.1038912862202241) internal successors, (348164), 315397 states have internal predecessors, (348164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315401 states to 315401 states and 348167 transitions. [2022-03-19 01:44:56,353 INFO L78 Accepts]: Start accepts. Automaton has 315401 states and 348167 transitions. Word has length 38 [2022-03-19 01:44:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:44:56,353 INFO L478 AbstractCegarLoop]: Abstraction has 315401 states and 348167 transitions. [2022-03-19 01:44:56,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:44:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 315401 states and 348167 transitions. [2022-03-19 01:44:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 01:44:56,523 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:44:56,523 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:44:56,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-19 01:44:56,523 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:44:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:44:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash -337892579, now seen corresponding path program 1 times [2022-03-19 01:44:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:44:56,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594913306] [2022-03-19 01:44:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:44:56,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:44:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:56,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:44:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:44:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:44:56,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:44:56,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594913306] [2022-03-19 01:44:56,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594913306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:44:56,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:44:56,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:44:56,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247254078] [2022-03-19 01:44:56,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:44:56,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:44:56,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:44:56,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:44:56,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:44:56,567 INFO L87 Difference]: Start difference. First operand 315401 states and 348167 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:45:01,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:45:01,223 INFO L93 Difference]: Finished difference Result 507915 states and 557064 transitions. [2022-03-19 01:45:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:45:01,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-19 01:45:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:45:02,113 INFO L225 Difference]: With dead ends: 507915 [2022-03-19 01:45:02,113 INFO L226 Difference]: Without dead ends: 507913 [2022-03-19 01:45:02,194 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:45:02,195 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:45:02,195 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 88 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:45:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507913 states. [2022-03-19 01:45:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507913 to 491529. [2022-03-19 01:45:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491529 states, 491525 states have (on average 1.0833304511469406) internal successors, (532484), 491525 states have internal predecessors, (532484), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:45:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491529 states to 491529 states and 532487 transitions. [2022-03-19 01:45:10,395 INFO L78 Accepts]: Start accepts. Automaton has 491529 states and 532487 transitions. Word has length 38 [2022-03-19 01:45:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:45:10,395 INFO L478 AbstractCegarLoop]: Abstraction has 491529 states and 532487 transitions. [2022-03-19 01:45:10,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:45:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 491529 states and 532487 transitions. [2022-03-19 01:45:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 01:45:11,217 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:45:11,217 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:45:11,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-19 01:45:11,217 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:45:11,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:45:11,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1015417118, now seen corresponding path program 1 times [2022-03-19 01:45:11,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:45:11,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125293685] [2022-03-19 01:45:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:45:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:45:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:45:11,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:45:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:45:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:45:11,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:45:11,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125293685] [2022-03-19 01:45:11,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125293685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:45:11,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:45:11,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:45:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960536916] [2022-03-19 01:45:11,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:45:11,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:45:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:45:11,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:45:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:45:11,287 INFO L87 Difference]: Start difference. First operand 491529 states and 532487 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:45:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:45:18,412 INFO L93 Difference]: Finished difference Result 1097737 states and 1171463 transitions. [2022-03-19 01:45:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:45:18,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-19 01:45:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:45:18,413 INFO L225 Difference]: With dead ends: 1097737 [2022-03-19 01:45:18,413 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 01:45:18,978 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:45:18,979 INFO L912 BasicCegarLoop]: 145 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 01:45:18,979 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 152 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 01:45:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 01:45:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 01:45:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 01:45:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 01:45:18,982 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2022-03-19 01:45:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:45:18,982 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 01:45:18,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:45:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 01:45:18,982 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 01:45:18,985 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 01:45:18,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-19 01:45:18,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.