./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product08.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product08.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G --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 25f377b9a54c9ee2ed75c64ae9c58ce8e9d7938b6493e908dfb7e7f7a3cef80e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:18:35,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:18:35,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:18:36,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:18:36,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:18:36,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:18:36,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:18:36,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:18:36,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:18:36,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:18:36,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:18:36,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:18:36,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:18:36,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:18:36,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:18:36,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:18:36,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:18:36,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:18:36,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:18:36,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:18:36,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:18:36,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:18:36,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:18:36,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:18:36,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:18:36,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:18:36,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:18:36,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:18:36,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:18:36,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:18:36,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:18:36,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:18:36,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:18:36,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:18:36,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:18:36,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:18:36,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:18:36,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:18:36,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:18:36,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:18:36,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:18:36,103 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:18:36,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:18:36,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:18:36,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:18:36,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:18:36,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:18:36,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:18:36,130 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:18:36,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:18:36,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:18:36,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:18:36,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:18:36,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:18:36,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:18:36,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:18:36,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:18:36,132 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:18:36,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:18:36,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:18:36,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:18:36,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:18:36,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:18:36,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:18:36,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:18:36,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:18:36,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:18:36,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:18:36,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:18:36,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:18:36,135 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:18:36,141 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:18:36,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:18:36,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:18:36,142 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_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25f377b9a54c9ee2ed75c64ae9c58ce8e9d7938b6493e908dfb7e7f7a3cef80e [2021-11-23 12:18:36,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:18:36,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:18:36,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:18:36,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:18:36,442 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:18:36,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/product-lines/email_spec11_product08.cil.c [2021-11-23 12:18:36,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/data/895cda8ed/0ff87c3ed6434e828494cf5031c09b5f/FLAG7c771616c [2021-11-23 12:18:37,148 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:18:37,149 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c [2021-11-23 12:18:37,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/data/895cda8ed/0ff87c3ed6434e828494cf5031c09b5f/FLAG7c771616c [2021-11-23 12:18:37,407 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/data/895cda8ed/0ff87c3ed6434e828494cf5031c09b5f [2021-11-23 12:18:37,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:18:37,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:18:37,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:18:37,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:18:37,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:18:37,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:18:37" (1/1) ... [2021-11-23 12:18:37,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d0b37ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:37, skipping insertion in model container [2021-11-23 12:18:37,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:18:37" (1/1) ... [2021-11-23 12:18:37,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:18:37,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:18:38,148 WARN L230 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_af4029de-caaf-4e4b-a978-f2f5294e71d7/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c[54831,54844] [2021-11-23 12:18:38,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:18:38,169 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:18:38,284 WARN L230 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_af4029de-caaf-4e4b-a978-f2f5294e71d7/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c[54831,54844] [2021-11-23 12:18:38,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:18:38,325 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:18:38,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38 WrapperNode [2021-11-23 12:18:38,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:18:38,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:18:38,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:18:38,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:18:38,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,443 INFO L137 Inliner]: procedures = 121, calls = 176, calls flagged for inlining = 92, calls inlined = 101, statements flattened = 1462 [2021-11-23 12:18:38,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:18:38,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:18:38,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:18:38,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:18:38,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:18:38,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:18:38,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:18:38,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:18:38,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (1/1) ... [2021-11-23 12:18:38,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:18:38,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:38,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:18:38,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:18:38,681 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 12:18:38,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:18:38,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:18:38,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:18:38,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:18:38,920 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:18:38,922 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:18:39,952 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:18:39,963 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:18:39,964 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 12:18:39,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:18:39 BoogieIcfgContainer [2021-11-23 12:18:39,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:18:39,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:18:39,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:18:40,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:18:40,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:18:37" (1/3) ... [2021-11-23 12:18:40,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78aa2f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:18:40, skipping insertion in model container [2021-11-23 12:18:40,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:38" (2/3) ... [2021-11-23 12:18:40,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78aa2f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:18:40, skipping insertion in model container [2021-11-23 12:18:40,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:18:39" (3/3) ... [2021-11-23 12:18:40,007 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product08.cil.c [2021-11-23 12:18:40,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:18:40,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 12:18:40,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:18:40,080 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 [2021-11-23 12:18:40,081 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 12:18:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 346 states, 343 states have (on average 1.6938775510204083) internal successors, (581), 345 states have internal predecessors, (581), 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) [2021-11-23 12:18:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 12:18:40,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:40,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:40,124 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:40,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:40,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1483741348, now seen corresponding path program 1 times [2021-11-23 12:18:40,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:40,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171407698] [2021-11-23 12:18:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:40,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:40,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:40,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171407698] [2021-11-23 12:18:40,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171407698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:40,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:40,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:40,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182215580] [2021-11-23 12:18:40,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:40,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:40,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:40,596 INFO L87 Difference]: Start difference. First operand has 346 states, 343 states have (on average 1.6938775510204083) internal successors, (581), 345 states have internal predecessors, (581), 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 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2021-11-23 12:18:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:40,787 INFO L93 Difference]: Finished difference Result 993 states and 1675 transitions. [2021-11-23 12:18:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:40,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2021-11-23 12:18:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:40,827 INFO L225 Difference]: With dead ends: 993 [2021-11-23 12:18:40,827 INFO L226 Difference]: Without dead ends: 629 [2021-11-23 12:18:40,837 INFO L932 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 [2021-11-23 12:18:40,842 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 550 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:40,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1654 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-23 12:18:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 325. [2021-11-23 12:18:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.6904024767801857) internal successors, (546), 324 states have internal predecessors, (546), 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) [2021-11-23 12:18:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 546 transitions. [2021-11-23 12:18:40,920 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 546 transitions. Word has length 46 [2021-11-23 12:18:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:40,920 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 546 transitions. [2021-11-23 12:18:40,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2021-11-23 12:18:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 546 transitions. [2021-11-23 12:18:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 12:18:40,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:40,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:40,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:18:40,926 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash 243451945, now seen corresponding path program 1 times [2021-11-23 12:18:40,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918290327] [2021-11-23 12:18:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:40,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:41,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:41,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918290327] [2021-11-23 12:18:41,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918290327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:41,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:41,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:18:41,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748884663] [2021-11-23 12:18:41,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:41,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:18:41,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:41,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:18:41,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:18:41,041 INFO L87 Difference]: Start difference. First operand 325 states and 546 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 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) [2021-11-23 12:18:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:41,273 INFO L93 Difference]: Finished difference Result 916 states and 1546 transitions. [2021-11-23 12:18:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:18:41,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 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 [2021-11-23 12:18:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:41,279 INFO L225 Difference]: With dead ends: 916 [2021-11-23 12:18:41,279 INFO L226 Difference]: Without dead ends: 614 [2021-11-23 12:18:41,282 INFO L932 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 [2021-11-23 12:18:41,283 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 1046 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:41,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 2492 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:18:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-23 12:18:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 325. [2021-11-23 12:18:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.6873065015479876) internal successors, (545), 324 states have internal predecessors, (545), 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) [2021-11-23 12:18:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 545 transitions. [2021-11-23 12:18:41,316 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 545 transitions. Word has length 48 [2021-11-23 12:18:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:41,317 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 545 transitions. [2021-11-23 12:18:41,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 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) [2021-11-23 12:18:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 545 transitions. [2021-11-23 12:18:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 12:18:41,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:41,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:41,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:18:41,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1929790574, now seen corresponding path program 1 times [2021-11-23 12:18:41,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:41,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690963628] [2021-11-23 12:18:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:41,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:41,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:41,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690963628] [2021-11-23 12:18:41,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690963628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:41,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:41,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:41,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14919879] [2021-11-23 12:18:41,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:41,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:41,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:41,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:41,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:41,396 INFO L87 Difference]: Start difference. First operand 325 states and 545 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-23 12:18:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:41,435 INFO L93 Difference]: Finished difference Result 629 states and 1061 transitions. [2021-11-23 12:18:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:41,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 49 [2021-11-23 12:18:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:41,439 INFO L225 Difference]: With dead ends: 629 [2021-11-23 12:18:41,439 INFO L226 Difference]: Without dead ends: 332 [2021-11-23 12:18:41,440 INFO L932 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 [2021-11-23 12:18:41,442 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 518 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:41,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 571 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-23 12:18:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 325. [2021-11-23 12:18:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.6780185758513932) internal successors, (542), 324 states have internal predecessors, (542), 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) [2021-11-23 12:18:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 542 transitions. [2021-11-23 12:18:41,466 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 542 transitions. Word has length 49 [2021-11-23 12:18:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:41,467 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 542 transitions. [2021-11-23 12:18:41,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-23 12:18:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 542 transitions. [2021-11-23 12:18:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 12:18:41,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:41,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:41,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:18:41,471 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash -41664237, now seen corresponding path program 1 times [2021-11-23 12:18:41,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:41,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509424129] [2021-11-23 12:18:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:41,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:41,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:41,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509424129] [2021-11-23 12:18:41,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509424129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:41,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:41,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:18:41,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380710710] [2021-11-23 12:18:41,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:41,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:18:41,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:18:41,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:18:41,546 INFO L87 Difference]: Start difference. First operand 325 states and 542 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) [2021-11-23 12:18:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:41,698 INFO L93 Difference]: Finished difference Result 903 states and 1523 transitions. [2021-11-23 12:18:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:18:41,699 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 [2021-11-23 12:18:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:41,704 INFO L225 Difference]: With dead ends: 903 [2021-11-23 12:18:41,704 INFO L226 Difference]: Without dead ends: 611 [2021-11-23 12:18:41,705 INFO L932 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 [2021-11-23 12:18:41,707 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 2461 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2461 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:41,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2461 Valid, 1065 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:18:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-23 12:18:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 325. [2021-11-23 12:18:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.674922600619195) internal successors, (541), 324 states have internal predecessors, (541), 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) [2021-11-23 12:18:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 541 transitions. [2021-11-23 12:18:41,760 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 541 transitions. Word has length 51 [2021-11-23 12:18:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:41,760 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 541 transitions. [2021-11-23 12:18:41,761 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) [2021-11-23 12:18:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 541 transitions. [2021-11-23 12:18:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 12:18:41,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:41,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:41,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:18:41,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:41,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1533208708, now seen corresponding path program 1 times [2021-11-23 12:18:41,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:41,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581573193] [2021-11-23 12:18:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:41,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:41,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:41,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581573193] [2021-11-23 12:18:41,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581573193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:41,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:41,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:18:41,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506885378] [2021-11-23 12:18:41,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:41,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:18:41,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:41,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:18:41,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:18:41,834 INFO L87 Difference]: Start difference. First operand 325 states and 541 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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) [2021-11-23 12:18:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:41,987 INFO L93 Difference]: Finished difference Result 910 states and 1529 transitions. [2021-11-23 12:18:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:18:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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 [2021-11-23 12:18:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:41,993 INFO L225 Difference]: With dead ends: 910 [2021-11-23 12:18:41,993 INFO L226 Difference]: Without dead ends: 618 [2021-11-23 12:18:41,994 INFO L932 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 [2021-11-23 12:18:41,996 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 2465 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2465 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:42,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2465 Valid, 1068 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:18:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-11-23 12:18:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 325. [2021-11-23 12:18:42,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.671826625386997) internal successors, (540), 324 states have internal predecessors, (540), 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) [2021-11-23 12:18:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 540 transitions. [2021-11-23 12:18:42,030 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 540 transitions. Word has length 52 [2021-11-23 12:18:42,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:42,030 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 540 transitions. [2021-11-23 12:18:42,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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) [2021-11-23 12:18:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 540 transitions. [2021-11-23 12:18:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 12:18:42,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:42,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:42,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:18:42,040 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1030238514, now seen corresponding path program 1 times [2021-11-23 12:18:42,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:42,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182946769] [2021-11-23 12:18:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:42,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:42,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:42,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182946769] [2021-11-23 12:18:42,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182946769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:42,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:42,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:42,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26739911] [2021-11-23 12:18:42,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:42,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:42,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:42,146 INFO L87 Difference]: Start difference. First operand 325 states and 540 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-23 12:18:42,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:42,176 INFO L93 Difference]: Finished difference Result 395 states and 639 transitions. [2021-11-23 12:18:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:42,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2021-11-23 12:18:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:42,179 INFO L225 Difference]: With dead ends: 395 [2021-11-23 12:18:42,179 INFO L226 Difference]: Without dead ends: 328 [2021-11-23 12:18:42,180 INFO L932 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 [2021-11-23 12:18:42,181 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 1 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:42,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1074 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-23 12:18:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2021-11-23 12:18:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 325 states have (on average 1.6676923076923076) internal successors, (542), 326 states have internal predecessors, (542), 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) [2021-11-23 12:18:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 542 transitions. [2021-11-23 12:18:42,208 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 542 transitions. Word has length 53 [2021-11-23 12:18:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:42,208 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 542 transitions. [2021-11-23 12:18:42,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-23 12:18:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 542 transitions. [2021-11-23 12:18:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 12:18:42,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:42,210 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:42,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:18:42,211 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:42,211 INFO L85 PathProgramCache]: Analyzing trace with hash 580369171, now seen corresponding path program 1 times [2021-11-23 12:18:42,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:42,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25187972] [2021-11-23 12:18:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:42,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:42,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:42,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25187972] [2021-11-23 12:18:42,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25187972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:42,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:42,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:42,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236217606] [2021-11-23 12:18:42,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:42,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:42,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:42,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:42,308 INFO L87 Difference]: Start difference. First operand 327 states and 542 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) [2021-11-23 12:18:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:42,357 INFO L93 Difference]: Finished difference Result 853 states and 1436 transitions. [2021-11-23 12:18:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:42,358 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 [2021-11-23 12:18:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:42,362 INFO L225 Difference]: With dead ends: 853 [2021-11-23 12:18:42,363 INFO L226 Difference]: Without dead ends: 564 [2021-11-23 12:18:42,363 INFO L932 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 [2021-11-23 12:18:42,364 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 490 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:42,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 980 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-23 12:18:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 497. [2021-11-23 12:18:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 495 states have (on average 1.707070707070707) internal successors, (845), 496 states have internal predecessors, (845), 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) [2021-11-23 12:18:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 845 transitions. [2021-11-23 12:18:42,403 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 845 transitions. Word has length 62 [2021-11-23 12:18:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:42,404 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 845 transitions. [2021-11-23 12:18:42,404 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) [2021-11-23 12:18:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 845 transitions. [2021-11-23 12:18:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 12:18:42,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:42,406 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:42,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:18:42,407 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash -189677343, now seen corresponding path program 1 times [2021-11-23 12:18:42,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:42,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270352910] [2021-11-23 12:18:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:42,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:42,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:42,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270352910] [2021-11-23 12:18:42,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270352910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:42,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:42,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:18:42,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998474659] [2021-11-23 12:18:42,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:42,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:18:42,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:42,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:18:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:18:42,470 INFO L87 Difference]: Start difference. First operand 497 states and 845 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2021-11-23 12:18:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:42,632 INFO L93 Difference]: Finished difference Result 1405 states and 2425 transitions. [2021-11-23 12:18:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:18:42,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 63 [2021-11-23 12:18:42,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:42,639 INFO L225 Difference]: With dead ends: 1405 [2021-11-23 12:18:42,640 INFO L226 Difference]: Without dead ends: 946 [2021-11-23 12:18:42,641 INFO L932 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 [2021-11-23 12:18:42,642 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 1015 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:42,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 2512 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:18:42,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-11-23 12:18:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 497. [2021-11-23 12:18:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 495 states have (on average 1.7030303030303031) internal successors, (843), 496 states have internal predecessors, (843), 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) [2021-11-23 12:18:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 843 transitions. [2021-11-23 12:18:42,702 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 843 transitions. Word has length 63 [2021-11-23 12:18:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:42,706 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 843 transitions. [2021-11-23 12:18:42,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2021-11-23 12:18:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 843 transitions. [2021-11-23 12:18:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 12:18:42,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:42,708 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:42,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:18:42,709 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash 504674720, now seen corresponding path program 1 times [2021-11-23 12:18:42,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:42,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484623572] [2021-11-23 12:18:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:42,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:42,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:42,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484623572] [2021-11-23 12:18:42,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484623572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:42,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:42,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:42,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283381422] [2021-11-23 12:18:42,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:42,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:42,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:42,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:42,783 INFO L87 Difference]: Start difference. First operand 497 states and 843 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-23 12:18:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:42,885 INFO L93 Difference]: Finished difference Result 1403 states and 2417 transitions. [2021-11-23 12:18:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:42,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-23 12:18:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:42,893 INFO L225 Difference]: With dead ends: 1403 [2021-11-23 12:18:42,893 INFO L226 Difference]: Without dead ends: 944 [2021-11-23 12:18:42,895 INFO L932 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 [2021-11-23 12:18:42,897 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 487 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:42,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1161 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:42,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-11-23 12:18:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 877. [2021-11-23 12:18:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 875 states have (on average 1.7417142857142858) internal successors, (1524), 876 states have internal predecessors, (1524), 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) [2021-11-23 12:18:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1524 transitions. [2021-11-23 12:18:42,974 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1524 transitions. Word has length 64 [2021-11-23 12:18:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:42,974 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1524 transitions. [2021-11-23 12:18:42,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-23 12:18:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1524 transitions. [2021-11-23 12:18:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 12:18:42,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:42,976 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:42,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:18:42,977 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1259886663, now seen corresponding path program 1 times [2021-11-23 12:18:42,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:42,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20829697] [2021-11-23 12:18:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:42,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:43,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:43,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20829697] [2021-11-23 12:18:43,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20829697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:43,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952015101] [2021-11-23 12:18:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:43,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:43,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:43,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:43,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:18:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:43,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:18:43,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:43,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:18:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:43,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952015101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:18:43,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:18:43,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 12:18:43,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702720447] [2021-11-23 12:18:43,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:18:43,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:18:43,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:18:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:18:43,640 INFO L87 Difference]: Start difference. First operand 877 states and 1524 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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) [2021-11-23 12:18:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:43,895 INFO L93 Difference]: Finished difference Result 2753 states and 4780 transitions. [2021-11-23 12:18:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:18:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 64 [2021-11-23 12:18:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:43,914 INFO L225 Difference]: With dead ends: 2753 [2021-11-23 12:18:43,914 INFO L226 Difference]: Without dead ends: 2686 [2021-11-23 12:18:43,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:18:43,917 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 1464 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:43,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 3166 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-11-23 12:18:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2485. [2021-11-23 12:18:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2485 states, 2483 states have (on average 1.7676198147402336) internal successors, (4389), 2484 states have internal predecessors, (4389), 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) [2021-11-23 12:18:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 4389 transitions. [2021-11-23 12:18:44,107 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 4389 transitions. Word has length 64 [2021-11-23 12:18:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:44,109 INFO L470 AbstractCegarLoop]: Abstraction has 2485 states and 4389 transitions. [2021-11-23 12:18:44,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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) [2021-11-23 12:18:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 4389 transitions. [2021-11-23 12:18:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 12:18:44,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:44,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:44,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:18:44,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4029de-caaf-4e4b-a978-f2f5294e71d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:44,344 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash -71359755, now seen corresponding path program 1 times [2021-11-23 12:18:44,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:44,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116652780] [2021-11-23 12:18:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:44,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:44,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:44,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116652780] [2021-11-23 12:18:44,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116652780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:44,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:44,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:44,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418013683] [2021-11-23 12:18:44,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:44,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:44,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:44,433 INFO L87 Difference]: Start difference. First operand 2485 states and 4389 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-23 12:18:44,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:44,726 INFO L93 Difference]: Finished difference Result 6399 states and 11337 transitions. [2021-11-23 12:18:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:44,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-11-23 12:18:44,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:44,756 INFO L225 Difference]: With dead ends: 6399 [2021-11-23 12:18:44,756 INFO L226 Difference]: Without dead ends: 4114 [2021-11-23 12:18:44,760 INFO L932 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 [2021-11-23 12:18:44,761 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 485 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:44,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 1065 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2021-11-23 12:18:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 4047. [2021-11-23 12:18:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 4045 states have (on average 1.7720642768850432) internal successors, (7168), 4046 states have internal predecessors, (7168), 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) [2021-11-23 12:18:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 7168 transitions. [2021-11-23 12:18:45,121 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 7168 transitions. Word has length 67 [2021-11-23 12:18:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:45,121 INFO L470 AbstractCegarLoop]: Abstraction has 4047 states and 7168 transitions. [2021-11-23 12:18:45,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-23 12:18:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 7168 transitions. [2021-11-23 12:18:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 12:18:45,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:45,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:45,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:18:45,126 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2021982169, now seen corresponding path program 1 times [2021-11-23 12:18:45,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:45,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188202056] [2021-11-23 12:18:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:45,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:45,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:45,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188202056] [2021-11-23 12:18:45,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188202056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:45,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:45,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:45,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266618323] [2021-11-23 12:18:45,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:45,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:45,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:45,196 INFO L87 Difference]: Start difference. First operand 4047 states and 7168 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-23 12:18:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:45,576 INFO L93 Difference]: Finished difference Result 9758 states and 17296 transitions. [2021-11-23 12:18:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:45,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-11-23 12:18:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:45,620 INFO L225 Difference]: With dead ends: 9758 [2021-11-23 12:18:45,620 INFO L226 Difference]: Without dead ends: 6278 [2021-11-23 12:18:45,626 INFO L932 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 [2021-11-23 12:18:45,628 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 483 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:45,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 1016 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2021-11-23 12:18:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 6211. [2021-11-23 12:18:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6211 states, 6209 states have (on average 1.7701723304880013) internal successors, (10991), 6210 states have internal predecessors, (10991), 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) [2021-11-23 12:18:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6211 states to 6211 states and 10991 transitions. [2021-11-23 12:18:46,047 INFO L78 Accepts]: Start accepts. Automaton has 6211 states and 10991 transitions. Word has length 68 [2021-11-23 12:18:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:46,048 INFO L470 AbstractCegarLoop]: Abstraction has 6211 states and 10991 transitions. [2021-11-23 12:18:46,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-23 12:18:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 6211 states and 10991 transitions. [2021-11-23 12:18:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 12:18:46,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:46,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:46,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 12:18:46,053 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash -723929085, now seen corresponding path program 1 times [2021-11-23 12:18:46,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:46,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122678127] [2021-11-23 12:18:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:46,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:46,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:46,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122678127] [2021-11-23 12:18:46,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122678127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:46,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:46,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:46,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45838979] [2021-11-23 12:18:46,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:46,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:46,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:46,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:46,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:46,112 INFO L87 Difference]: Start difference. First operand 6211 states and 10991 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-23 12:18:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:46,800 INFO L93 Difference]: Finished difference Result 14671 states and 25969 transitions. [2021-11-23 12:18:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:46,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2021-11-23 12:18:46,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:46,865 INFO L225 Difference]: With dead ends: 14671 [2021-11-23 12:18:46,865 INFO L226 Difference]: Without dead ends: 9616 [2021-11-23 12:18:46,873 INFO L932 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 [2021-11-23 12:18:46,874 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 481 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:46,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 1016 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9616 states. [2021-11-23 12:18:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9616 to 9549. [2021-11-23 12:18:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9549 states, 9547 states have (on average 1.7667330051325023) internal successors, (16867), 9548 states have internal predecessors, (16867), 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) [2021-11-23 12:18:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9549 states to 9549 states and 16867 transitions. [2021-11-23 12:18:47,543 INFO L78 Accepts]: Start accepts. Automaton has 9549 states and 16867 transitions. Word has length 69 [2021-11-23 12:18:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:47,543 INFO L470 AbstractCegarLoop]: Abstraction has 9549 states and 16867 transitions. [2021-11-23 12:18:47,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-23 12:18:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 9549 states and 16867 transitions. [2021-11-23 12:18:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 12:18:47,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:47,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:47,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:18:47,550 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:47,550 INFO L85 PathProgramCache]: Analyzing trace with hash -148540777, now seen corresponding path program 1 times [2021-11-23 12:18:47,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:47,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607933039] [2021-11-23 12:18:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:47,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:47,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:47,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607933039] [2021-11-23 12:18:47,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607933039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:47,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:47,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:47,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099568469] [2021-11-23 12:18:47,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:47,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:47,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:47,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:47,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:47,619 INFO L87 Difference]: Start difference. First operand 9549 states and 16867 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-23 12:18:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:48,573 INFO L93 Difference]: Finished difference Result 24016 states and 42477 transitions. [2021-11-23 12:18:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:48,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2021-11-23 12:18:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:48,628 INFO L225 Difference]: With dead ends: 24016 [2021-11-23 12:18:48,628 INFO L226 Difference]: Without dead ends: 16091 [2021-11-23 12:18:48,644 INFO L932 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 [2021-11-23 12:18:48,645 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 479 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:48,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 1072 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16091 states. [2021-11-23 12:18:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16091 to 16024. [2021-11-23 12:18:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16024 states, 16022 states have (on average 1.7652602671326925) internal successors, (28283), 16023 states have internal predecessors, (28283), 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) [2021-11-23 12:18:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16024 states to 16024 states and 28283 transitions. [2021-11-23 12:18:49,735 INFO L78 Accepts]: Start accepts. Automaton has 16024 states and 28283 transitions. Word has length 70 [2021-11-23 12:18:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:49,735 INFO L470 AbstractCegarLoop]: Abstraction has 16024 states and 28283 transitions. [2021-11-23 12:18:49,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-23 12:18:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 16024 states and 28283 transitions. [2021-11-23 12:18:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 12:18:49,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:49,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:49,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:18:49,745 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:49,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2017790573, now seen corresponding path program 1 times [2021-11-23 12:18:49,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:49,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71917455] [2021-11-23 12:18:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:49,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:49,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:49,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71917455] [2021-11-23 12:18:49,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71917455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:49,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:49,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:49,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132463898] [2021-11-23 12:18:49,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:49,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:49,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:49,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:49,810 INFO L87 Difference]: Start difference. First operand 16024 states and 28283 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-23 12:18:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:51,190 INFO L93 Difference]: Finished difference Result 40868 states and 72377 transitions. [2021-11-23 12:18:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-11-23 12:18:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:51,280 INFO L225 Difference]: With dead ends: 40868 [2021-11-23 12:18:51,280 INFO L226 Difference]: Without dead ends: 27358 [2021-11-23 12:18:51,304 INFO L932 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 [2021-11-23 12:18:51,306 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 477 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:51,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 1063 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27358 states. [2021-11-23 12:18:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27358 to 27291. [2021-11-23 12:18:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27291 states, 27289 states have (on average 1.7676719557330793) internal successors, (48238), 27290 states have internal predecessors, (48238), 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) [2021-11-23 12:18:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27291 states to 27291 states and 48238 transitions. [2021-11-23 12:18:53,230 INFO L78 Accepts]: Start accepts. Automaton has 27291 states and 48238 transitions. Word has length 71 [2021-11-23 12:18:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:53,230 INFO L470 AbstractCegarLoop]: Abstraction has 27291 states and 48238 transitions. [2021-11-23 12:18:53,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-23 12:18:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27291 states and 48238 transitions. [2021-11-23 12:18:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 12:18:53,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:53,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:53,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:18:53,239 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1421784821, now seen corresponding path program 1 times [2021-11-23 12:18:53,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415729589] [2021-11-23 12:18:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:53,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:53,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:53,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415729589] [2021-11-23 12:18:53,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415729589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:53,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:53,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:53,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086167247] [2021-11-23 12:18:53,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:53,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:53,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:53,289 INFO L87 Difference]: Start difference. First operand 27291 states and 48238 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-23 12:18:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:55,153 INFO L93 Difference]: Finished difference Result 72698 states and 128707 transitions. [2021-11-23 12:18:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:18:55,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-23 12:18:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:55,316 INFO L225 Difference]: With dead ends: 72698 [2021-11-23 12:18:55,316 INFO L226 Difference]: Without dead ends: 48853 [2021-11-23 12:18:55,356 INFO L932 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 [2021-11-23 12:18:55,357 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 475 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:55,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1072 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48853 states. [2021-11-23 12:18:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48853 to 48786. [2021-11-23 12:18:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48786 states, 48784 states have (on average 1.7658658576582487) internal successors, (86146), 48785 states have internal predecessors, (86146), 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) [2021-11-23 12:18:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48786 states to 48786 states and 86146 transitions. [2021-11-23 12:18:57,752 INFO L78 Accepts]: Start accepts. Automaton has 48786 states and 86146 transitions. Word has length 72 [2021-11-23 12:18:57,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:57,753 INFO L470 AbstractCegarLoop]: Abstraction has 48786 states and 86146 transitions. [2021-11-23 12:18:57,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-23 12:18:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 48786 states and 86146 transitions. [2021-11-23 12:18:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 12:18:57,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:57,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:57,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:18:57,766 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:18:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash 150490591, now seen corresponding path program 1 times [2021-11-23 12:18:57,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:57,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39672649] [2021-11-23 12:18:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:57,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:57,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:57,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39672649] [2021-11-23 12:18:57,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39672649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:57,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:57,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:57,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084737946] [2021-11-23 12:18:57,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:57,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:18:57,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:57,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:18:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:18:57,814 INFO L87 Difference]: Start difference. First operand 48786 states and 86146 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-23 12:19:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:00,838 INFO L93 Difference]: Finished difference Result 124831 states and 220345 transitions. [2021-11-23 12:19:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:19:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2021-11-23 12:19:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:01,040 INFO L225 Difference]: With dead ends: 124831 [2021-11-23 12:19:01,041 INFO L226 Difference]: Without dead ends: 81794 [2021-11-23 12:19:01,110 INFO L932 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 [2021-11-23 12:19:01,110 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 473 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:01,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 1016 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:01,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81794 states. [2021-11-23 12:19:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81794 to 81727. [2021-11-23 12:19:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81727 states, 81725 states have (on average 1.7593514836341388) internal successors, (143783), 81726 states have internal predecessors, (143783), 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) [2021-11-23 12:19:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81727 states to 81727 states and 143783 transitions. [2021-11-23 12:19:05,306 INFO L78 Accepts]: Start accepts. Automaton has 81727 states and 143783 transitions. Word has length 73 [2021-11-23 12:19:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:05,307 INFO L470 AbstractCegarLoop]: Abstraction has 81727 states and 143783 transitions. [2021-11-23 12:19:05,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-23 12:19:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 81727 states and 143783 transitions. [2021-11-23 12:19:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 12:19:05,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:05,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:05,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 12:19:05,320 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:05,322 INFO L85 PathProgramCache]: Analyzing trace with hash 48896147, now seen corresponding path program 1 times [2021-11-23 12:19:05,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:05,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168463592] [2021-11-23 12:19:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:05,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:05,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168463592] [2021-11-23 12:19:05,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168463592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:05,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:05,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:19:05,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987611328] [2021-11-23 12:19:05,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:05,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:19:05,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:19:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:05,377 INFO L87 Difference]: Start difference. First operand 81727 states and 143783 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-23 12:19:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:10,884 INFO L93 Difference]: Finished difference Result 225248 states and 397452 transitions. [2021-11-23 12:19:10,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:19:10,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2021-11-23 12:19:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:11,242 INFO L225 Difference]: With dead ends: 225248 [2021-11-23 12:19:11,243 INFO L226 Difference]: Without dead ends: 150898 [2021-11-23 12:19:11,334 INFO L932 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 [2021-11-23 12:19:11,335 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 471 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:11,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1063 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150898 states. [2021-11-23 12:19:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150898 to 150831. [2021-11-23 12:19:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150831 states, 150829 states have (on average 1.761577680684749) internal successors, (265697), 150830 states have internal predecessors, (265697), 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) [2021-11-23 12:19:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150831 states to 150831 states and 265697 transitions. [2021-11-23 12:19:18,783 INFO L78 Accepts]: Start accepts. Automaton has 150831 states and 265697 transitions. Word has length 74 [2021-11-23 12:19:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:18,783 INFO L470 AbstractCegarLoop]: Abstraction has 150831 states and 265697 transitions. [2021-11-23 12:19:18,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-23 12:19:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 150831 states and 265697 transitions. [2021-11-23 12:19:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 12:19:18,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:18,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:18,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 12:19:18,799 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:18,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1407948655, now seen corresponding path program 1 times [2021-11-23 12:19:18,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:18,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028478437] [2021-11-23 12:19:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:18,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:18,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:18,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028478437] [2021-11-23 12:19:18,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028478437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:18,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:18,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:19:18,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252514522] [2021-11-23 12:19:18,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:18,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:19:18,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:18,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:19:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:18,852 INFO L87 Difference]: Start difference. First operand 150831 states and 265697 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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)