./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e931bf8fe4413228ccd3caf40302412c554842907046b600d394a87eb5d13e97 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:13:52,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:13:52,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:13:52,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:13:52,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:13:52,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:13:52,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:13:52,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:13:52,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:13:52,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:13:52,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:13:52,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:13:52,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:13:52,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:13:52,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:13:52,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:13:52,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:13:52,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:13:52,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:13:52,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:13:52,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:13:52,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:13:52,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:13:52,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:13:52,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:13:52,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:13:52,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:13:52,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:13:52,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:13:52,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:13:52,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:13:52,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:13:52,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:13:52,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:13:52,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:13:52,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:13:52,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:13:52,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:13:52,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:13:52,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:13:52,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:13:52,990 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:13:53,034 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:13:53,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:13:53,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:13:53,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:13:53,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:13:53,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:13:53,043 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:13:53,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:13:53,044 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:13:53,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:13:53,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:13:53,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:13:53,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:13:53,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:13:53,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:13:53,046 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:13:53,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:13:53,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:13:53,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:13:53,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:13:53,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:13:53,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:13:53,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:13:53,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:13:53,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:13:53,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:13:53,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:13:53,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:13:53,049 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:13:53,051 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:13:53,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:13:53,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:13:53,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e931bf8fe4413228ccd3caf40302412c554842907046b600d394a87eb5d13e97 [2021-11-02 22:13:53,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:13:53,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:13:53,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:13:53,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:13:53,328 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:13:53,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/product-lines/email_spec9_product30.cil.c [2021-11-02 22:13:53,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/data/f6093ab20/6b2182c9d4de41bd90c323c99184be2b/FLAG3a3fb9bcc [2021-11-02 22:13:53,924 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:13:53,925 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/sv-benchmarks/c/product-lines/email_spec9_product30.cil.c [2021-11-02 22:13:53,949 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/data/f6093ab20/6b2182c9d4de41bd90c323c99184be2b/FLAG3a3fb9bcc [2021-11-02 22:13:54,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/data/f6093ab20/6b2182c9d4de41bd90c323c99184be2b [2021-11-02 22:13:54,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:13:54,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:13:54,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:13:54,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:13:54,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:13:54,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:13:54" (1/1) ... [2021-11-02 22:13:54,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fc6c983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:54, skipping insertion in model container [2021-11-02 22:13:54,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:13:54" (1/1) ... [2021-11-02 22:13:54,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:13:54,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:13:54,843 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/sv-benchmarks/c/product-lines/email_spec9_product30.cil.c[41508,41521] [2021-11-02 22:13:54,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:13:54,951 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:13:55,060 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/sv-benchmarks/c/product-lines/email_spec9_product30.cil.c[41508,41521] [2021-11-02 22:13:55,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:13:55,123 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:13:55,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55 WrapperNode [2021-11-02 22:13:55,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:13:55,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:13:55,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:13:55,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:13:55,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:13:55,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:13:55,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:13:55,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:13:55,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:13:55,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:13:55,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:13:55,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:13:55,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (1/1) ... [2021-11-02 22:13:55,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:13:55,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:55,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:13:55,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:13:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-02 22:13:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:13:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:13:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:13:55,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:13:57,579 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:13:57,579 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-02 22:13:57,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:13:57 BoogieIcfgContainer [2021-11-02 22:13:57,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:13:57,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:13:57,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:13:57,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:13:57,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:13:54" (1/3) ... [2021-11-02 22:13:57,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9cb9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:13:57, skipping insertion in model container [2021-11-02 22:13:57,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:55" (2/3) ... [2021-11-02 22:13:57,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9cb9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:13:57, skipping insertion in model container [2021-11-02 22:13:57,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:13:57" (3/3) ... [2021-11-02 22:13:57,590 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product30.cil.c [2021-11-02 22:13:57,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:13:57,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 22:13:57,684 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:13:57,695 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:13:57,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 22:13:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 505 states, 502 states have (on average 1.7569721115537849) internal successors, (882), 504 states have internal predecessors, (882), 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) [2021-11-02 22:13:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:13:57,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:57,742 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:57,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1606635459, now seen corresponding path program 1 times [2021-11-02 22:13:57,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:57,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082358636] [2021-11-02 22:13:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:57,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:58,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:58,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082358636] [2021-11-02 22:13:58,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082358636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:58,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:58,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:13:58,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466806618] [2021-11-02 22:13:58,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:13:58,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:13:58,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:58,248 INFO L87 Difference]: Start difference. First operand has 505 states, 502 states have (on average 1.7569721115537849) internal successors, (882), 504 states have internal predecessors, (882), 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) Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2021-11-02 22:13:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:58,408 INFO L93 Difference]: Finished difference Result 1480 states and 2588 transitions. [2021-11-02 22:13:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:13:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) Word has length 45 [2021-11-02 22:13:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:58,429 INFO L225 Difference]: With dead ends: 1480 [2021-11-02 22:13:58,429 INFO L226 Difference]: Without dead ends: 826 [2021-11-02 22:13:58,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-11-02 22:13:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 422. [2021-11-02 22:13:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.75) internal successors, (735), 421 states have internal predecessors, (735), 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) [2021-11-02 22:13:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 735 transitions. [2021-11-02 22:13:58,561 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 735 transitions. Word has length 45 [2021-11-02 22:13:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:58,563 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 735 transitions. [2021-11-02 22:13:58,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2021-11-02 22:13:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 735 transitions. [2021-11-02 22:13:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:13:58,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:58,570 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:58,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:13:58,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:58,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1641619126, now seen corresponding path program 1 times [2021-11-02 22:13:58,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:58,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120704853] [2021-11-02 22:13:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:58,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:58,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:58,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120704853] [2021-11-02 22:13:58,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120704853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:58,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:58,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:13:58,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134825915] [2021-11-02 22:13:58,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:13:58,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:58,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:13:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:13:58,729 INFO L87 Difference]: Start difference. First operand 422 states and 735 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-11-02 22:13:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:58,928 INFO L93 Difference]: Finished difference Result 1215 states and 2121 transitions. [2021-11-02 22:13:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:13:58,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) Word has length 47 [2021-11-02 22:13:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:58,935 INFO L225 Difference]: With dead ends: 1215 [2021-11-02 22:13:58,936 INFO L226 Difference]: Without dead ends: 812 [2021-11-02 22:13:58,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:13:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-02 22:13:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 422. [2021-11-02 22:13:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.7476190476190476) internal successors, (734), 421 states have internal predecessors, (734), 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) [2021-11-02 22:13:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 734 transitions. [2021-11-02 22:13:58,979 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 734 transitions. Word has length 47 [2021-11-02 22:13:58,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:58,979 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 734 transitions. [2021-11-02 22:13:58,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-11-02 22:13:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 734 transitions. [2021-11-02 22:13:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:13:58,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:58,984 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:58,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:13:58,985 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1741248093, now seen corresponding path program 1 times [2021-11-02 22:13:58,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:58,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200206617] [2021-11-02 22:13:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:58,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:59,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:59,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200206617] [2021-11-02 22:13:59,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200206617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:59,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:59,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:13:59,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525770628] [2021-11-02 22:13:59,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:13:59,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:13:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:59,077 INFO L87 Difference]: Start difference. First operand 422 states and 734 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-02 22:13:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:59,113 INFO L93 Difference]: Finished difference Result 826 states and 1442 transitions. [2021-11-02 22:13:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:13:59,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) Word has length 48 [2021-11-02 22:13:59,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:59,116 INFO L225 Difference]: With dead ends: 826 [2021-11-02 22:13:59,117 INFO L226 Difference]: Without dead ends: 427 [2021-11-02 22:13:59,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-02 22:13:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 422. [2021-11-02 22:13:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.7404761904761905) internal successors, (731), 421 states have internal predecessors, (731), 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) [2021-11-02 22:13:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 731 transitions. [2021-11-02 22:13:59,150 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 731 transitions. Word has length 48 [2021-11-02 22:13:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:59,151 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 731 transitions. [2021-11-02 22:13:59,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-02 22:13:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 731 transitions. [2021-11-02 22:13:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:13:59,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:59,153 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:59,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:13:59,153 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1735348642, now seen corresponding path program 1 times [2021-11-02 22:13:59,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:59,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569117336] [2021-11-02 22:13:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:59,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:59,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:59,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569117336] [2021-11-02 22:13:59,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569117336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:59,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:59,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:13:59,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933439813] [2021-11-02 22:13:59,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:13:59,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:59,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:13:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:13:59,236 INFO L87 Difference]: Start difference. First operand 422 states and 731 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2021-11-02 22:13:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:59,365 INFO L93 Difference]: Finished difference Result 1205 states and 2101 transitions. [2021-11-02 22:13:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:13:59,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) Word has length 50 [2021-11-02 22:13:59,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:59,371 INFO L225 Difference]: With dead ends: 1205 [2021-11-02 22:13:59,371 INFO L226 Difference]: Without dead ends: 810 [2021-11-02 22:13:59,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:13:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-11-02 22:13:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 422. [2021-11-02 22:13:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.7380952380952381) internal successors, (730), 421 states have internal predecessors, (730), 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) [2021-11-02 22:13:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 730 transitions. [2021-11-02 22:13:59,395 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 730 transitions. Word has length 50 [2021-11-02 22:13:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:59,395 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 730 transitions. [2021-11-02 22:13:59,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2021-11-02 22:13:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 730 transitions. [2021-11-02 22:13:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:13:59,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:59,397 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:59,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:13:59,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:59,398 INFO L85 PathProgramCache]: Analyzing trace with hash -256314721, now seen corresponding path program 1 times [2021-11-02 22:13:59,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:59,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810877968] [2021-11-02 22:13:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:59,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:59,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:59,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810877968] [2021-11-02 22:13:59,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810877968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:59,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:59,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:13:59,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939258251] [2021-11-02 22:13:59,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:13:59,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:13:59,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:13:59,471 INFO L87 Difference]: Start difference. First operand 422 states and 730 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-02 22:13:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:59,623 INFO L93 Difference]: Finished difference Result 1210 states and 2105 transitions. [2021-11-02 22:13:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:13:59,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) Word has length 51 [2021-11-02 22:13:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:59,629 INFO L225 Difference]: With dead ends: 1210 [2021-11-02 22:13:59,630 INFO L226 Difference]: Without dead ends: 815 [2021-11-02 22:13:59,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:13:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-11-02 22:13:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 422. [2021-11-02 22:13:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.7357142857142858) internal successors, (729), 421 states have internal predecessors, (729), 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) [2021-11-02 22:13:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 729 transitions. [2021-11-02 22:13:59,657 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 729 transitions. Word has length 51 [2021-11-02 22:13:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:59,657 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 729 transitions. [2021-11-02 22:13:59,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-02 22:13:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 729 transitions. [2021-11-02 22:13:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:13:59,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:59,659 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:59,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:13:59,660 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:59,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash -114337145, now seen corresponding path program 1 times [2021-11-02 22:13:59,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:59,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265559349] [2021-11-02 22:13:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:59,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:59,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:59,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265559349] [2021-11-02 22:13:59,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265559349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:59,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:59,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:13:59,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251847347] [2021-11-02 22:13:59,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:13:59,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:59,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:13:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:59,731 INFO L87 Difference]: Start difference. First operand 422 states and 729 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-02 22:13:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:59,766 INFO L93 Difference]: Finished difference Result 606 states and 1034 transitions. [2021-11-02 22:13:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:13:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) Word has length 52 [2021-11-02 22:13:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:59,770 INFO L225 Difference]: With dead ends: 606 [2021-11-02 22:13:59,770 INFO L226 Difference]: Without dead ends: 425 [2021-11-02 22:13:59,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-02 22:13:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 424. [2021-11-02 22:13:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 422 states have (on average 1.7322274881516588) internal successors, (731), 423 states have internal predecessors, (731), 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) [2021-11-02 22:13:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 731 transitions. [2021-11-02 22:13:59,800 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 731 transitions. Word has length 52 [2021-11-02 22:13:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:59,800 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 731 transitions. [2021-11-02 22:13:59,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-02 22:13:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 731 transitions. [2021-11-02 22:13:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 22:13:59,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:59,802 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:59,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:13:59,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:59,803 INFO L85 PathProgramCache]: Analyzing trace with hash -425189799, now seen corresponding path program 1 times [2021-11-02 22:13:59,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:59,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023766206] [2021-11-02 22:13:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:59,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:59,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:59,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023766206] [2021-11-02 22:13:59,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023766206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:59,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:59,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:13:59,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625610230] [2021-11-02 22:13:59,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:13:59,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:13:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:59,871 INFO L87 Difference]: Start difference. First operand 424 states and 731 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-02 22:13:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:59,940 INFO L93 Difference]: Finished difference Result 1158 states and 2017 transitions. [2021-11-02 22:13:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:13:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) Word has length 60 [2021-11-02 22:13:59,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:59,946 INFO L225 Difference]: With dead ends: 1158 [2021-11-02 22:13:59,947 INFO L226 Difference]: Without dead ends: 765 [2021-11-02 22:13:59,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:59,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-11-02 22:13:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 584. [2021-11-02 22:13:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 582 states have (on average 1.7594501718213058) internal successors, (1024), 583 states have internal predecessors, (1024), 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) [2021-11-02 22:13:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1024 transitions. [2021-11-02 22:13:59,998 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1024 transitions. Word has length 60 [2021-11-02 22:13:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:59,998 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1024 transitions. [2021-11-02 22:13:59,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-02 22:13:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1024 transitions. [2021-11-02 22:14:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:14:00,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:00,001 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:00,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:14:00,001 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:00,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash 395421402, now seen corresponding path program 1 times [2021-11-02 22:14:00,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:00,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424122215] [2021-11-02 22:14:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:00,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:00,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:00,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424122215] [2021-11-02 22:14:00,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424122215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:00,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:00,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:14:00,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54674537] [2021-11-02 22:14:00,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:14:00,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:14:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:14:00,099 INFO L87 Difference]: Start difference. First operand 584 states and 1024 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-02 22:14:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:00,477 INFO L93 Difference]: Finished difference Result 1682 states and 2978 transitions. [2021-11-02 22:14:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:14:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) Word has length 61 [2021-11-02 22:14:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:00,485 INFO L225 Difference]: With dead ends: 1682 [2021-11-02 22:14:00,485 INFO L226 Difference]: Without dead ends: 1129 [2021-11-02 22:14:00,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:14:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-11-02 22:14:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 584. [2021-11-02 22:14:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 582 states have (on average 1.7560137457044673) internal successors, (1022), 583 states have internal predecessors, (1022), 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) [2021-11-02 22:14:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1022 transitions. [2021-11-02 22:14:00,541 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1022 transitions. Word has length 61 [2021-11-02 22:14:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:00,541 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1022 transitions. [2021-11-02 22:14:00,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-02 22:14:00,542 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1022 transitions. [2021-11-02 22:14:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:14:00,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:00,543 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:00,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:14:00,544 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:00,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash 216241251, now seen corresponding path program 1 times [2021-11-02 22:14:00,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:00,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805468331] [2021-11-02 22:14:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:00,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:00,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:00,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805468331] [2021-11-02 22:14:00,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805468331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:00,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:00,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:00,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461128904] [2021-11-02 22:14:00,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:00,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:00,630 INFO L87 Difference]: Start difference. First operand 584 states and 1022 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-02 22:14:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:00,730 INFO L93 Difference]: Finished difference Result 1680 states and 2970 transitions. [2021-11-02 22:14:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:00,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) Word has length 62 [2021-11-02 22:14:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:00,739 INFO L225 Difference]: With dead ends: 1680 [2021-11-02 22:14:00,739 INFO L226 Difference]: Without dead ends: 1127 [2021-11-02 22:14:00,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-11-02 22:14:00,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 946. [2021-11-02 22:14:00,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 944 states have (on average 1.784957627118644) internal successors, (1685), 945 states have internal predecessors, (1685), 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) [2021-11-02 22:14:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1685 transitions. [2021-11-02 22:14:00,807 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1685 transitions. Word has length 62 [2021-11-02 22:14:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:00,808 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1685 transitions. [2021-11-02 22:14:00,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-02 22:14:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1685 transitions. [2021-11-02 22:14:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:14:00,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:00,810 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:00,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:14:00,811 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:00,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1342090363, now seen corresponding path program 1 times [2021-11-02 22:14:00,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:00,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979851582] [2021-11-02 22:14:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:00,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:00,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:00,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979851582] [2021-11-02 22:14:00,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979851582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:00,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448295143] [2021-11-02 22:14:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:00,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:00,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:14:00,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:14:00,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:14:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:01,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:14:01,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:14:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:14:01,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448295143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:01,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:14:01,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-02 22:14:01,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315439819] [2021-11-02 22:14:01,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:01,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:01,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:01,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:14:01,470 INFO L87 Difference]: Start difference. First operand 946 states and 1685 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2021-11-02 22:14:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:01,537 INFO L93 Difference]: Finished difference Result 1074 states and 1897 transitions. [2021-11-02 22:14:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) Word has length 62 [2021-11-02 22:14:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:01,545 INFO L225 Difference]: With dead ends: 1074 [2021-11-02 22:14:01,545 INFO L226 Difference]: Without dead ends: 940 [2021-11-02 22:14:01,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:14:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-11-02 22:14:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 940. [2021-11-02 22:14:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 1.784877529286475) internal successors, (1676), 939 states have internal predecessors, (1676), 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) [2021-11-02 22:14:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1676 transitions. [2021-11-02 22:14:01,608 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1676 transitions. Word has length 62 [2021-11-02 22:14:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:01,608 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1676 transitions. [2021-11-02 22:14:01,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2021-11-02 22:14:01,609 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1676 transitions. [2021-11-02 22:14:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-02 22:14:01,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:01,617 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:01,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 22:14:01,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:01,835 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1407696010, now seen corresponding path program 1 times [2021-11-02 22:14:01,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:01,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074036090] [2021-11-02 22:14:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:01,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:01,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:01,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074036090] [2021-11-02 22:14:01,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074036090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:01,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505166690] [2021-11-02 22:14:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:01,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:14:01,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:14:01,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:14:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:14:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:14:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:02,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505166690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:02,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:14:02,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 22:14:02,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273721040] [2021-11-02 22:14:02,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:14:02,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:02,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:14:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:14:02,553 INFO L87 Difference]: Start difference. First operand 940 states and 1676 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2021-11-02 22:14:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:02,667 INFO L93 Difference]: Finished difference Result 1509 states and 2656 transitions. [2021-11-02 22:14:02,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:14:02,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) Word has length 103 [2021-11-02 22:14:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:02,677 INFO L225 Difference]: With dead ends: 1509 [2021-11-02 22:14:02,677 INFO L226 Difference]: Without dead ends: 1334 [2021-11-02 22:14:02,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:14:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-11-02 22:14:02,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1156. [2021-11-02 22:14:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 1.7887445887445887) internal successors, (2066), 1155 states have internal predecessors, (2066), 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) [2021-11-02 22:14:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2066 transitions. [2021-11-02 22:14:02,768 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2066 transitions. Word has length 103 [2021-11-02 22:14:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:02,769 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 2066 transitions. [2021-11-02 22:14:02,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2021-11-02 22:14:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2066 transitions. [2021-11-02 22:14:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 22:14:02,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:02,773 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:02,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:14:02,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f115c49b-0b44-44b8-baf7-2c54be609d65/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:02,987 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash -740219853, now seen corresponding path program 1 times [2021-11-02 22:14:02,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:02,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521855931] [2021-11-02 22:14:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:02,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:03,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:03,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521855931] [2021-11-02 22:14:03,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521855931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:03,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:03,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:03,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170832729] [2021-11-02 22:14:03,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:03,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:03,093 INFO L87 Difference]: Start difference. First operand 1156 states and 2066 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-02 22:14:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:03,224 INFO L93 Difference]: Finished difference Result 3102 states and 5572 transitions. [2021-11-02 22:14:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) Word has length 107 [2021-11-02 22:14:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:03,236 INFO L225 Difference]: With dead ends: 3102 [2021-11-02 22:14:03,236 INFO L226 Difference]: Without dead ends: 2047 [2021-11-02 22:14:03,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2021-11-02 22:14:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1872. [2021-11-02 22:14:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 1.8017103153393907) internal successors, (3371), 1871 states have internal predecessors, (3371), 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) [2021-11-02 22:14:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3371 transitions. [2021-11-02 22:14:03,362 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3371 transitions. Word has length 107 [2021-11-02 22:14:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:03,362 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 3371 transitions. [2021-11-02 22:14:03,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-02 22:14:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3371 transitions. [2021-11-02 22:14:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-02 22:14:03,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:03,367 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:03,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:14:03,368 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:03,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1973771853, now seen corresponding path program 1 times [2021-11-02 22:14:03,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:03,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282315400] [2021-11-02 22:14:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:03,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:03,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:03,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282315400] [2021-11-02 22:14:03,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282315400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:03,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:03,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:03,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126671924] [2021-11-02 22:14:03,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:03,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:03,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:03,456 INFO L87 Difference]: Start difference. First operand 1872 states and 3371 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2021-11-02 22:14:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:03,659 INFO L93 Difference]: Finished difference Result 4986 states and 9006 transitions. [2021-11-02 22:14:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:03,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) Word has length 108 [2021-11-02 22:14:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:03,680 INFO L225 Difference]: With dead ends: 4986 [2021-11-02 22:14:03,680 INFO L226 Difference]: Without dead ends: 3249 [2021-11-02 22:14:03,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2021-11-02 22:14:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 3074. [2021-11-02 22:14:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 3073 states have (on average 1.808005206638464) internal successors, (5556), 3073 states have internal predecessors, (5556), 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) [2021-11-02 22:14:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 5556 transitions. [2021-11-02 22:14:03,906 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 5556 transitions. Word has length 108 [2021-11-02 22:14:03,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:03,906 INFO L470 AbstractCegarLoop]: Abstraction has 3074 states and 5556 transitions. [2021-11-02 22:14:03,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2021-11-02 22:14:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 5556 transitions. [2021-11-02 22:14:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-02 22:14:03,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:03,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:03,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:14:03,915 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:03,916 INFO L85 PathProgramCache]: Analyzing trace with hash -328210140, now seen corresponding path program 1 times [2021-11-02 22:14:03,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:03,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016947703] [2021-11-02 22:14:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:03,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:03,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:03,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016947703] [2021-11-02 22:14:03,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016947703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:03,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:03,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:03,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437289757] [2021-11-02 22:14:03,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:03,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:03,983 INFO L87 Difference]: Start difference. First operand 3074 states and 5556 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-11-02 22:14:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:04,287 INFO L93 Difference]: Finished difference Result 8308 states and 15044 transitions. [2021-11-02 22:14:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) Word has length 109 [2021-11-02 22:14:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:04,322 INFO L225 Difference]: With dead ends: 8308 [2021-11-02 22:14:04,322 INFO L226 Difference]: Without dead ends: 5403 [2021-11-02 22:14:04,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5403 states. [2021-11-02 22:14:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5403 to 5228. [2021-11-02 22:14:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5228 states, 5227 states have (on average 1.8100248708628277) internal successors, (9461), 5227 states have internal predecessors, (9461), 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) [2021-11-02 22:14:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5228 states to 5228 states and 9461 transitions. [2021-11-02 22:14:04,685 INFO L78 Accepts]: Start accepts. Automaton has 5228 states and 9461 transitions. Word has length 109 [2021-11-02 22:14:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:04,686 INFO L470 AbstractCegarLoop]: Abstraction has 5228 states and 9461 transitions. [2021-11-02 22:14:04,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-11-02 22:14:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5228 states and 9461 transitions. [2021-11-02 22:14:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-02 22:14:04,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:04,699 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:04,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:14:04,700 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1733160324, now seen corresponding path program 1 times [2021-11-02 22:14:04,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:04,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443516022] [2021-11-02 22:14:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:04,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:04,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:04,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443516022] [2021-11-02 22:14:04,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443516022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:04,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:04,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:04,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668741235] [2021-11-02 22:14:04,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:04,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:04,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:04,769 INFO L87 Difference]: Start difference. First operand 5228 states and 9461 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-11-02 22:14:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:05,320 INFO L93 Difference]: Finished difference Result 15228 states and 27601 transitions. [2021-11-02 22:14:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) Word has length 110 [2021-11-02 22:14:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:05,374 INFO L225 Difference]: With dead ends: 15228 [2021-11-02 22:14:05,374 INFO L226 Difference]: Without dead ends: 10173 [2021-11-02 22:14:05,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2021-11-02 22:14:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 9998. [2021-11-02 22:14:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9998 states, 9997 states have (on average 1.81074322296689) internal successors, (18102), 9997 states have internal predecessors, (18102), 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) [2021-11-02 22:14:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9998 states to 9998 states and 18102 transitions. [2021-11-02 22:14:05,956 INFO L78 Accepts]: Start accepts. Automaton has 9998 states and 18102 transitions. Word has length 110 [2021-11-02 22:14:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:05,956 INFO L470 AbstractCegarLoop]: Abstraction has 9998 states and 18102 transitions. [2021-11-02 22:14:05,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-11-02 22:14:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 9998 states and 18102 transitions. [2021-11-02 22:14:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 22:14:05,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:05,980 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:05,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:14:05,981 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:05,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1891951277, now seen corresponding path program 1 times [2021-11-02 22:14:05,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:05,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071110517] [2021-11-02 22:14:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:05,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:06,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:06,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071110517] [2021-11-02 22:14:06,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071110517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:06,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:06,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:06,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844150939] [2021-11-02 22:14:06,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:06,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:06,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:06,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:06,147 INFO L87 Difference]: Start difference. First operand 9998 states and 18102 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2021-11-02 22:14:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:07,075 INFO L93 Difference]: Finished difference Result 29240 states and 52999 transitions. [2021-11-02 22:14:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:07,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) Word has length 111 [2021-11-02 22:14:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:07,184 INFO L225 Difference]: With dead ends: 29240 [2021-11-02 22:14:07,184 INFO L226 Difference]: Without dead ends: 19423 [2021-11-02 22:14:07,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19423 states. [2021-11-02 22:14:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19423 to 19248. [2021-11-02 22:14:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19248 states, 19247 states have (on average 1.8101002753675897) internal successors, (34839), 19247 states have internal predecessors, (34839), 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) [2021-11-02 22:14:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19248 states to 19248 states and 34839 transitions. [2021-11-02 22:14:08,240 INFO L78 Accepts]: Start accepts. Automaton has 19248 states and 34839 transitions. Word has length 111 [2021-11-02 22:14:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:08,240 INFO L470 AbstractCegarLoop]: Abstraction has 19248 states and 34839 transitions. [2021-11-02 22:14:08,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2021-11-02 22:14:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 19248 states and 34839 transitions. [2021-11-02 22:14:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-02 22:14:08,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:08,280 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:08,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:14:08,281 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:08,281 INFO L85 PathProgramCache]: Analyzing trace with hash 586080966, now seen corresponding path program 1 times [2021-11-02 22:14:08,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:08,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25208575] [2021-11-02 22:14:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:08,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:08,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:08,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25208575] [2021-11-02 22:14:08,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25208575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:08,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:08,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:08,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138309541] [2021-11-02 22:14:08,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:08,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:08,345 INFO L87 Difference]: Start difference. First operand 19248 states and 34839 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-11-02 22:14:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:09,784 INFO L93 Difference]: Finished difference Result 57176 states and 103524 transitions. [2021-11-02 22:14:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:09,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) Word has length 112 [2021-11-02 22:14:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:09,916 INFO L225 Difference]: With dead ends: 57176 [2021-11-02 22:14:09,917 INFO L226 Difference]: Without dead ends: 38113 [2021-11-02 22:14:09,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38113 states. [2021-11-02 22:14:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38113 to 37938. [2021-11-02 22:14:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37938 states, 37937 states have (on average 1.8074175606927274) internal successors, (68568), 37937 states have internal predecessors, (68568), 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) [2021-11-02 22:14:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37938 states to 37938 states and 68568 transitions. [2021-11-02 22:14:11,911 INFO L78 Accepts]: Start accepts. Automaton has 37938 states and 68568 transitions. Word has length 112 [2021-11-02 22:14:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:11,911 INFO L470 AbstractCegarLoop]: Abstraction has 37938 states and 68568 transitions. [2021-11-02 22:14:11,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-11-02 22:14:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 37938 states and 68568 transitions. [2021-11-02 22:14:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 22:14:11,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:11,966 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:11,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:14:11,966 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1350977178, now seen corresponding path program 1 times [2021-11-02 22:14:11,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:11,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115712885] [2021-11-02 22:14:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:11,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:14:12,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:12,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115712885] [2021-11-02 22:14:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115712885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:12,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:12,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:14:12,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674620524] [2021-11-02 22:14:12,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:14:12,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:14:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:14:12,047 INFO L87 Difference]: Start difference. First operand 37938 states and 68568 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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) [2021-11-02 22:14:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:14,643 INFO L93 Difference]: Finished difference Result 111517 states and 201517 transitions. [2021-11-02 22:14:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:14:14,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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) Word has length 113 [2021-11-02 22:14:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:14,793 INFO L225 Difference]: With dead ends: 111517 [2021-11-02 22:14:14,793 INFO L226 Difference]: Without dead ends: 73832 [2021-11-02 22:14:14,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:14:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73832 states. [2021-11-02 22:14:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73832 to 37938. [2021-11-02 22:14:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37938 states, 37937 states have (on average 1.8006168120831905) internal successors, (68310), 37937 states have internal predecessors, (68310), 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) [2021-11-02 22:14:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37938 states to 37938 states and 68310 transitions. [2021-11-02 22:14:16,831 INFO L78 Accepts]: Start accepts. Automaton has 37938 states and 68310 transitions. Word has length 113 [2021-11-02 22:14:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:16,831 INFO L470 AbstractCegarLoop]: Abstraction has 37938 states and 68310 transitions. [2021-11-02 22:14:16,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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) [2021-11-02 22:14:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 37938 states and 68310 transitions. [2021-11-02 22:14:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 22:14:16,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:16,871 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:14:16,871 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1877183048, now seen corresponding path program 2 times [2021-11-02 22:14:16,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:16,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510470018] [2021-11-02 22:14:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:16,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:16,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:16,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510470018] [2021-11-02 22:14:16,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510470018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:16,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:16,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:14:16,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046616608] [2021-11-02 22:14:16,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:14:16,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:16,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:14:16,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:14:16,960 INFO L87 Difference]: Start difference. First operand 37938 states and 68310 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-11-02 22:14:18,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:18,642 INFO L93 Difference]: Finished difference Result 75792 states and 136478 transitions. [2021-11-02 22:14:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:14:18,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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) Word has length 113 [2021-11-02 22:14:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:18,710 INFO L225 Difference]: With dead ends: 75792 [2021-11-02 22:14:18,710 INFO L226 Difference]: Without dead ends: 38113 [2021-11-02 22:14:18,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:14:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38113 states. [2021-11-02 22:14:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38113 to 37938. [2021-11-02 22:14:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37938 states, 37937 states have (on average 1.7972427972691567) internal successors, (68182), 37937 states have internal predecessors, (68182), 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) [2021-11-02 22:14:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37938 states to 37938 states and 68182 transitions. [2021-11-02 22:14:20,413 INFO L78 Accepts]: Start accepts. Automaton has 37938 states and 68182 transitions. Word has length 113 [2021-11-02 22:14:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:20,413 INFO L470 AbstractCegarLoop]: Abstraction has 37938 states and 68182 transitions. [2021-11-02 22:14:20,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-11-02 22:14:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 37938 states and 68182 transitions. [2021-11-02 22:14:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 22:14:20,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:20,449 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:20,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:14:20,449 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:20,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1316427739, now seen corresponding path program 1 times [2021-11-02 22:14:20,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:20,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181276953] [2021-11-02 22:14:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:20,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:20,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:20,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181276953] [2021-11-02 22:14:20,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181276953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:20,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:20,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:20,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950297984] [2021-11-02 22:14:20,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:20,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:20,510 INFO L87 Difference]: Start difference. First operand 37938 states and 68182 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-11-02 22:14:23,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:23,106 INFO L93 Difference]: Finished difference Result 105402 states and 189160 transitions. [2021-11-02 22:14:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:23,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) Word has length 113 [2021-11-02 22:14:23,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:23,204 INFO L225 Difference]: With dead ends: 105402 [2021-11-02 22:14:23,205 INFO L226 Difference]: Without dead ends: 67683 [2021-11-02 22:14:23,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67683 states. [2021-11-02 22:14:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67683 to 67508. [2021-11-02 22:14:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67508 states, 67507 states have (on average 1.7893107381456739) internal successors, (120791), 67507 states have internal predecessors, (120791), 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) [2021-11-02 22:14:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67508 states to 67508 states and 120791 transitions. [2021-11-02 22:14:26,292 INFO L78 Accepts]: Start accepts. Automaton has 67508 states and 120791 transitions. Word has length 113 [2021-11-02 22:14:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:26,292 INFO L470 AbstractCegarLoop]: Abstraction has 67508 states and 120791 transitions. [2021-11-02 22:14:26,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-11-02 22:14:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 67508 states and 120791 transitions. [2021-11-02 22:14:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 22:14:26,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:26,566 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:26,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:14:26,567 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:26,567 INFO L85 PathProgramCache]: Analyzing trace with hash 795082494, now seen corresponding path program 1 times [2021-11-02 22:14:26,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:26,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640953839] [2021-11-02 22:14:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:26,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:14:26,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:26,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640953839] [2021-11-02 22:14:26,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640953839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:26,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:26,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:14:26,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181291691] [2021-11-02 22:14:26,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:14:26,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:14:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:14:26,686 INFO L87 Difference]: Start difference. First operand 67508 states and 120791 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-11-02 22:14:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:31,583 INFO L93 Difference]: Finished difference Result 135466 states and 242332 transitions. [2021-11-02 22:14:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:14:31,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) Word has length 114 [2021-11-02 22:14:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:31,875 INFO L225 Difference]: With dead ends: 135466 [2021-11-02 22:14:31,875 INFO L226 Difference]: Without dead ends: 135309 [2021-11-02 22:14:31,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:14:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135309 states. [2021-11-02 22:14:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135309 to 134964. [2021-11-02 22:14:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134964 states, 134963 states have (on average 1.7893422641761074) internal successors, (241495), 134963 states have internal predecessors, (241495), 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) [2021-11-02 22:14:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134964 states to 134964 states and 241495 transitions. [2021-11-02 22:14:37,982 INFO L78 Accepts]: Start accepts. Automaton has 134964 states and 241495 transitions. Word has length 114 [2021-11-02 22:14:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:37,982 INFO L470 AbstractCegarLoop]: Abstraction has 134964 states and 241495 transitions. [2021-11-02 22:14:37,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-11-02 22:14:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 134964 states and 241495 transitions. [2021-11-02 22:14:38,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-02 22:14:38,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:38,071 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:38,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:14:38,072 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:38,072 INFO L85 PathProgramCache]: Analyzing trace with hash -208704021, now seen corresponding path program 1 times [2021-11-02 22:14:38,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:38,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432173944] [2021-11-02 22:14:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:38,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:14:38,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:38,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432173944] [2021-11-02 22:14:38,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432173944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:38,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:38,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:14:38,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613731929] [2021-11-02 22:14:38,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:14:38,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:14:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:14:38,132 INFO L87 Difference]: Start difference. First operand 134964 states and 241495 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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)