./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product05.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_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/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_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/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_5bca7ece-8881-495f-b1c2-40db449ab244/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 74a12e124f66b10df64ef68155d31c3be83012aab827a45870f5335a6569b75a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:56:07,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:56:07,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:56:07,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:56:07,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:56:07,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:56:07,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:56:07,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:56:07,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:56:07,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:56:07,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:56:07,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:56:07,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:56:07,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:56:07,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:56:07,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:56:07,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:56:07,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:56:07,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:56:07,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:56:07,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:56:07,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:56:07,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:56:07,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:56:07,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:56:07,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:56:07,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:56:07,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:56:07,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:56:07,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:56:07,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:56:07,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:56:07,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:56:07,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:56:07,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:56:07,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:56:07,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:56:07,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:56:07,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:56:07,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:56:07,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:56:07,360 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:56:07,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:56:07,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:56:07,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:56:07,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:56:07,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:56:07,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:56:07,420 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:56:07,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:56:07,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:56:07,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:56:07,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:56:07,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:56:07,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:56:07,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:56:07,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:56:07,424 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:56:07,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:56:07,425 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:56:07,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:56:07,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:56:07,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:56:07,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:56:07,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:56:07,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:56:07,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:56:07,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:56:07,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:56:07,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:56:07,428 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:56:07,430 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:56:07,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:56:07,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:56:07,431 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_5bca7ece-8881-495f-b1c2-40db449ab244/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74a12e124f66b10df64ef68155d31c3be83012aab827a45870f5335a6569b75a [2021-11-23 13:56:07,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:56:07,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:56:07,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:56:07,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:56:07,770 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:56:07,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2021-11-23 13:56:07,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/data/13cd15e95/24e6a28d38a24edb83cccde0dd179fc7/FLAG1d681318f [2021-11-23 13:56:08,654 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:56:08,655 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2021-11-23 13:56:08,699 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/data/13cd15e95/24e6a28d38a24edb83cccde0dd179fc7/FLAG1d681318f [2021-11-23 13:56:08,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/data/13cd15e95/24e6a28d38a24edb83cccde0dd179fc7 [2021-11-23 13:56:08,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:56:08,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:56:08,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:56:08,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:56:08,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:56:08,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:08" (1/1) ... [2021-11-23 13:56:08,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589889e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:08, skipping insertion in model container [2021-11-23 13:56:08,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:08" (1/1) ... [2021-11-23 13:56:08,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:56:09,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:56:09,287 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_5bca7ece-8881-495f-b1c2-40db449ab244/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c[4289,4302] [2021-11-23 13:56:09,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:56:09,684 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:56:09,729 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_5bca7ece-8881-495f-b1c2-40db449ab244/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c[4289,4302] [2021-11-23 13:56:09,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:56:09,965 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:56:09,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09 WrapperNode [2021-11-23 13:56:09,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:56:09,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:56:09,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:56:09,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:56:09,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,094 INFO L137 Inliner]: procedures = 107, calls = 125, calls flagged for inlining = 54, calls inlined = 63, statements flattened = 918 [2021-11-23 13:56:10,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:56:10,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:56:10,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:56:10,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:56:10,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:56:10,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:56:10,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:56:10,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:56:10,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (1/1) ... [2021-11-23 13:56:10,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:56:10,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:10,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:56:10,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:56:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 13:56:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:56:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:56:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:56:10,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:56:10,559 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:56:10,561 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:56:11,317 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:56:11,334 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:56:11,334 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 13:56:11,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:11 BoogieIcfgContainer [2021-11-23 13:56:11,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:56:11,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:56:11,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:56:11,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:56:11,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:56:08" (1/3) ... [2021-11-23 13:56:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df47860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:11, skipping insertion in model container [2021-11-23 13:56:11,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:09" (2/3) ... [2021-11-23 13:56:11,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df47860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:11, skipping insertion in model container [2021-11-23 13:56:11,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:11" (3/3) ... [2021-11-23 13:56:11,350 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product05.cil.c [2021-11-23 13:56:11,361 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:56:11,361 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 13:56:11,428 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:56:11,438 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 13:56:11,438 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 13:56:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 152 states have (on average 1.5592105263157894) internal successors, (237), 154 states have internal predecessors, (237), 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 13:56:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:56:11,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:11,505 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] [2021-11-23 13:56:11,506 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1360582211, now seen corresponding path program 1 times [2021-11-23 13:56:11,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:11,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525527356] [2021-11-23 13:56:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:11,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:12,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525527356] [2021-11-23 13:56:12,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525527356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:12,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:12,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:12,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207805981] [2021-11-23 13:56:12,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:12,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:12,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:12,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:12,082 INFO L87 Difference]: Start difference. First operand has 155 states, 152 states have (on average 1.5592105263157894) internal successors, (237), 154 states have internal predecessors, (237), 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 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 13:56:12,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:12,204 INFO L93 Difference]: Finished difference Result 430 states and 659 transitions. [2021-11-23 13:56:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:12,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 39 [2021-11-23 13:56:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:12,223 INFO L225 Difference]: With dead ends: 430 [2021-11-23 13:56:12,223 INFO L226 Difference]: Without dead ends: 242 [2021-11-23 13:56:12,228 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 13:56:12,232 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 206 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 638 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 13:56:12,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 638 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-23 13:56:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 129. [2021-11-23 13:56:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 127 states have (on average 1.5354330708661417) internal successors, (195), 128 states have internal predecessors, (195), 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 13:56:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 195 transitions. [2021-11-23 13:56:12,292 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 195 transitions. Word has length 39 [2021-11-23 13:56:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:12,293 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 195 transitions. [2021-11-23 13:56:12,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 13:56:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 195 transitions. [2021-11-23 13:56:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 13:56:12,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:12,296 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] [2021-11-23 13:56:12,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:56:12,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash 580940388, now seen corresponding path program 1 times [2021-11-23 13:56:12,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:12,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131274353] [2021-11-23 13:56:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:12,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:12,387 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 13:56:12,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:12,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131274353] [2021-11-23 13:56:12,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131274353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:12,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:12,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:12,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305424841] [2021-11-23 13:56:12,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:12,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:12,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:12,392 INFO L87 Difference]: Start difference. First operand 129 states and 195 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 13:56:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:12,449 INFO L93 Difference]: Finished difference Result 242 states and 368 transitions. [2021-11-23 13:56:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:12,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2021-11-23 13:56:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:12,461 INFO L225 Difference]: With dead ends: 242 [2021-11-23 13:56:12,461 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 13:56:12,462 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 13:56:12,464 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 198 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 13:56:12,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 198 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 13:56:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-11-23 13:56:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 127 states have (on average 1.5118110236220472) internal successors, (192), 128 states have internal predecessors, (192), 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 13:56:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 192 transitions. [2021-11-23 13:56:12,499 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 192 transitions. Word has length 41 [2021-11-23 13:56:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:12,500 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 192 transitions. [2021-11-23 13:56:12,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 13:56:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 192 transitions. [2021-11-23 13:56:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 13:56:12,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:12,503 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] [2021-11-23 13:56:12,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:56:12,512 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:12,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2025072033, now seen corresponding path program 1 times [2021-11-23 13:56:12,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:12,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699715707] [2021-11-23 13:56:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:12,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:12,621 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 13:56:12,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:12,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699715707] [2021-11-23 13:56:12,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699715707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:12,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:12,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:12,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305576231] [2021-11-23 13:56:12,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:12,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:12,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:12,625 INFO L87 Difference]: Start difference. First operand 129 states and 192 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 13:56:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:12,674 INFO L93 Difference]: Finished difference Result 210 states and 308 transitions. [2021-11-23 13:56:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:12,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2021-11-23 13:56:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:12,682 INFO L225 Difference]: With dead ends: 210 [2021-11-23 13:56:12,682 INFO L226 Difference]: Without dead ends: 132 [2021-11-23 13:56:12,685 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 13:56:12,686 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 378 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 13:56:12,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 378 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:12,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-23 13:56:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-11-23 13:56:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.503875968992248) internal successors, (194), 130 states have internal predecessors, (194), 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 13:56:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 194 transitions. [2021-11-23 13:56:12,707 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 194 transitions. Word has length 43 [2021-11-23 13:56:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:12,714 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 194 transitions. [2021-11-23 13:56:12,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 13:56:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 194 transitions. [2021-11-23 13:56:12,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 13:56:12,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:12,723 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] [2021-11-23 13:56:12,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:56:12,723 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2071487814, now seen corresponding path program 1 times [2021-11-23 13:56:12,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656966470] [2021-11-23 13:56:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:12,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:12,852 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 13:56:12,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:12,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656966470] [2021-11-23 13:56:12,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656966470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:56:12,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959615940] [2021-11-23 13:56:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:12,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:12,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:12,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:56:12,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:56:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:56:13,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:13,323 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 13:56:13,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:13,430 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 13:56:13,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959615940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:56:13,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:56:13,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 13:56:13,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296197040] [2021-11-23 13:56:13,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:56:13,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:56:13,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:13,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:56:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:56:13,434 INFO L87 Difference]: Start difference. First operand 131 states and 194 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:13,494 INFO L93 Difference]: Finished difference Result 533 states and 810 transitions. [2021-11-23 13:56:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:56:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-23 13:56:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:13,519 INFO L225 Difference]: With dead ends: 533 [2021-11-23 13:56:13,519 INFO L226 Difference]: Without dead ends: 455 [2021-11-23 13:56:13,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 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 13:56:13,522 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 656 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:13,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1173 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-23 13:56:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 221. [2021-11-23 13:56:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 219 states have (on average 1.639269406392694) internal successors, (359), 220 states have internal predecessors, (359), 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 13:56:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 359 transitions. [2021-11-23 13:56:13,552 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 359 transitions. Word has length 48 [2021-11-23 13:56:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:13,552 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 359 transitions. [2021-11-23 13:56:13,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 359 transitions. [2021-11-23 13:56:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 13:56:13,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:13,556 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] [2021-11-23 13:56:13,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:13,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bca7ece-8881-495f-b1c2-40db449ab244/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:13,784 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 850101508, now seen corresponding path program 1 times [2021-11-23 13:56:13,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:13,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975197842] [2021-11-23 13:56:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:13,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:13,855 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 13:56:13,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:13,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975197842] [2021-11-23 13:56:13,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975197842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:13,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:13,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:13,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147161145] [2021-11-23 13:56:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:13,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:13,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:13,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:13,859 INFO L87 Difference]: Start difference. First operand 221 states and 359 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 13:56:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:13,902 INFO L93 Difference]: Finished difference Result 583 states and 961 transitions. [2021-11-23 13:56:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:13,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2021-11-23 13:56:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:13,912 INFO L225 Difference]: With dead ends: 583 [2021-11-23 13:56:13,912 INFO L226 Difference]: Without dead ends: 388 [2021-11-23 13:56:13,914 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 13:56:13,917 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 163 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 379 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 13:56:13,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 379 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-23 13:56:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 310. [2021-11-23 13:56:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 308 states have (on average 1.6785714285714286) internal successors, (517), 309 states have internal predecessors, (517), 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 13:56:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 517 transitions. [2021-11-23 13:56:13,957 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 517 transitions. Word has length 55 [2021-11-23 13:56:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:13,958 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 517 transitions. [2021-11-23 13:56:13,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 13:56:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 517 transitions. [2021-11-23 13:56:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 13:56:13,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:13,962 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] [2021-11-23 13:56:13,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:56:13,963 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 280616158, now seen corresponding path program 1 times [2021-11-23 13:56:13,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:13,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914768314] [2021-11-23 13:56:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:13,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:14,017 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 13:56:14,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:14,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914768314] [2021-11-23 13:56:14,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914768314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:14,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:14,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:14,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632377578] [2021-11-23 13:56:14,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:14,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:14,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:14,021 INFO L87 Difference]: Start difference. First operand 310 states and 517 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 13:56:14,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:14,067 INFO L93 Difference]: Finished difference Result 811 states and 1367 transitions. [2021-11-23 13:56:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:14,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-23 13:56:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:14,073 INFO L225 Difference]: With dead ends: 811 [2021-11-23 13:56:14,073 INFO L226 Difference]: Without dead ends: 535 [2021-11-23 13:56:14,074 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 13:56:14,075 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 161 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 378 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 13:56:14,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 378 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-23 13:56:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 457. [2021-11-23 13:56:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 455 states have (on average 1.701098901098901) internal successors, (774), 456 states have internal predecessors, (774), 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 13:56:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 774 transitions. [2021-11-23 13:56:14,112 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 774 transitions. Word has length 56 [2021-11-23 13:56:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:14,113 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 774 transitions. [2021-11-23 13:56:14,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 13:56:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 774 transitions. [2021-11-23 13:56:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 13:56:14,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:14,116 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] [2021-11-23 13:56:14,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:56:14,117 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:14,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1245051482, now seen corresponding path program 1 times [2021-11-23 13:56:14,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:14,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296067267] [2021-11-23 13:56:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:14,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:14,170 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 13:56:14,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:14,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296067267] [2021-11-23 13:56:14,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296067267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:14,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:14,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:14,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32863211] [2021-11-23 13:56:14,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:14,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:14,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:14,174 INFO L87 Difference]: Start difference. First operand 457 states and 774 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 13:56:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:14,234 INFO L93 Difference]: Finished difference Result 1173 states and 2002 transitions. [2021-11-23 13:56:14,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:14,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2021-11-23 13:56:14,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:14,242 INFO L225 Difference]: With dead ends: 1173 [2021-11-23 13:56:14,242 INFO L226 Difference]: Without dead ends: 769 [2021-11-23 13:56:14,243 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 13:56:14,244 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 159 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 378 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 13:56:14,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 378 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:14,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-11-23 13:56:14,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 691. [2021-11-23 13:56:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 689 states have (on average 1.7068214804063861) internal successors, (1176), 690 states have internal predecessors, (1176), 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 13:56:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1176 transitions. [2021-11-23 13:56:14,291 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1176 transitions. Word has length 57 [2021-11-23 13:56:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:14,292 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1176 transitions. [2021-11-23 13:56:14,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 13:56:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1176 transitions. [2021-11-23 13:56:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 13:56:14,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:14,296 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] [2021-11-23 13:56:14,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:56:14,297 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash 471088188, now seen corresponding path program 1 times [2021-11-23 13:56:14,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:14,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056355437] [2021-11-23 13:56:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:14,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:14,369 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 13:56:14,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056355437] [2021-11-23 13:56:14,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056355437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:14,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:14,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:14,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252322523] [2021-11-23 13:56:14,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:14,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:14,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:14,373 INFO L87 Difference]: Start difference. First operand 691 states and 1176 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 13:56:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:14,456 INFO L93 Difference]: Finished difference Result 1745 states and 2992 transitions. [2021-11-23 13:56:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:14,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2021-11-23 13:56:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:14,466 INFO L225 Difference]: With dead ends: 1745 [2021-11-23 13:56:14,466 INFO L226 Difference]: Without dead ends: 1145 [2021-11-23 13:56:14,468 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 13:56:14,469 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 157 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 378 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 13:56:14,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 378 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-11-23 13:56:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1067. [2021-11-23 13:56:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1065 states have (on average 1.7023474178403757) internal successors, (1813), 1066 states have internal predecessors, (1813), 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 13:56:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1813 transitions. [2021-11-23 13:56:14,559 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1813 transitions. Word has length 58 [2021-11-23 13:56:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:14,560 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1813 transitions. [2021-11-23 13:56:14,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 13:56:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1813 transitions. [2021-11-23 13:56:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 13:56:14,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:14,564 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] [2021-11-23 13:56:14,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:56:14,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1357532744, now seen corresponding path program 1 times [2021-11-23 13:56:14,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:14,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124807722] [2021-11-23 13:56:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:14,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:14,637 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 13:56:14,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:14,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124807722] [2021-11-23 13:56:14,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124807722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:14,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:14,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:14,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855512962] [2021-11-23 13:56:14,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:14,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:14,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:14,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:14,640 INFO L87 Difference]: Start difference. First operand 1067 states and 1813 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 13:56:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:14,767 INFO L93 Difference]: Finished difference Result 2680 states and 4593 transitions. [2021-11-23 13:56:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-23 13:56:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:14,782 INFO L225 Difference]: With dead ends: 2680 [2021-11-23 13:56:14,782 INFO L226 Difference]: Without dead ends: 1769 [2021-11-23 13:56:14,784 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 13:56:14,787 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 155 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 378 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 13:56:14,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 378 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-11-23 13:56:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1691. [2021-11-23 13:56:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1689 states have (on average 1.6933096506808762) internal successors, (2860), 1690 states have internal predecessors, (2860), 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 13:56:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2860 transitions. [2021-11-23 13:56:14,915 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2860 transitions. Word has length 59 [2021-11-23 13:56:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:14,915 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 2860 transitions. [2021-11-23 13:56:14,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 13:56:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2860 transitions. [2021-11-23 13:56:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 13:56:14,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:14,921 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] [2021-11-23 13:56:14,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:56:14,921 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash -421149798, now seen corresponding path program 1 times [2021-11-23 13:56:14,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:14,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803586423] [2021-11-23 13:56:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:14,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:15,009 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 13:56:15,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803586423] [2021-11-23 13:56:15,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803586423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:15,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:15,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:15,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846069163] [2021-11-23 13:56:15,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:15,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:15,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:15,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:15,012 INFO L87 Difference]: Start difference. First operand 1691 states and 2860 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:15,209 INFO L93 Difference]: Finished difference Result 4007 states and 6872 transitions. [2021-11-23 13:56:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 13:56:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:15,231 INFO L225 Difference]: With dead ends: 4007 [2021-11-23 13:56:15,231 INFO L226 Difference]: Without dead ends: 2652 [2021-11-23 13:56:15,236 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 13:56:15,237 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 370 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 13:56:15,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 370 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-11-23 13:56:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2574. [2021-11-23 13:56:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 2572 states have (on average 1.6889580093312597) internal successors, (4344), 2573 states have internal predecessors, (4344), 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 13:56:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 4344 transitions. [2021-11-23 13:56:15,417 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 4344 transitions. Word has length 60 [2021-11-23 13:56:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:15,417 INFO L470 AbstractCegarLoop]: Abstraction has 2574 states and 4344 transitions. [2021-11-23 13:56:15,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 4344 transitions. [2021-11-23 13:56:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 13:56:15,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:15,422 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] [2021-11-23 13:56:15,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:56:15,423 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1685749482, now seen corresponding path program 1 times [2021-11-23 13:56:15,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:15,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964124708] [2021-11-23 13:56:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:15,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:15,480 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 13:56:15,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:15,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964124708] [2021-11-23 13:56:15,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964124708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:15,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:15,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:15,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788551140] [2021-11-23 13:56:15,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:15,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:15,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:15,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:15,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:15,482 INFO L87 Difference]: Start difference. First operand 2574 states and 4344 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:15,770 INFO L93 Difference]: Finished difference Result 6516 states and 11124 transitions. [2021-11-23 13:56:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 13:56:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:15,807 INFO L225 Difference]: With dead ends: 6516 [2021-11-23 13:56:15,808 INFO L226 Difference]: Without dead ends: 4421 [2021-11-23 13:56:15,813 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 13:56:15,814 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 151 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 378 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 13:56:15,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 378 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-11-23 13:56:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 4343. [2021-11-23 13:56:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4341 states have (on average 1.6770329417184981) internal successors, (7280), 4342 states have internal predecessors, (7280), 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 13:56:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 7280 transitions. [2021-11-23 13:56:16,227 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 7280 transitions. Word has length 61 [2021-11-23 13:56:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:16,228 INFO L470 AbstractCegarLoop]: Abstraction has 4343 states and 7280 transitions. [2021-11-23 13:56:16,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 7280 transitions. [2021-11-23 13:56:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 13:56:16,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:16,237 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] [2021-11-23 13:56:16,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:56:16,238 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:16,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:16,239 INFO L85 PathProgramCache]: Analyzing trace with hash 134098188, now seen corresponding path program 1 times [2021-11-23 13:56:16,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:16,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616336830] [2021-11-23 13:56:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:16,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:16,296 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 13:56:16,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:16,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616336830] [2021-11-23 13:56:16,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616336830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:16,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:16,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:16,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536807263] [2021-11-23 13:56:16,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:16,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:16,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:16,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:16,299 INFO L87 Difference]: Start difference. First operand 4343 states and 7280 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 13:56:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:16,784 INFO L93 Difference]: Finished difference Result 11312 states and 19152 transitions. [2021-11-23 13:56:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:16,784 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 13:56:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:16,843 INFO L225 Difference]: With dead ends: 11312 [2021-11-23 13:56:16,843 INFO L226 Difference]: Without dead ends: 7672 [2021-11-23 13:56:16,850 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 13:56:16,851 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 149 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 378 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 13:56:16,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 378 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7672 states. [2021-11-23 13:56:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7672 to 7594. [2021-11-23 13:56:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7594 states, 7592 states have (on average 1.6631981032665963) internal successors, (12627), 7593 states have internal predecessors, (12627), 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 13:56:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 12627 transitions. [2021-11-23 13:56:17,402 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 12627 transitions. Word has length 62 [2021-11-23 13:56:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:17,403 INFO L470 AbstractCegarLoop]: Abstraction has 7594 states and 12627 transitions. [2021-11-23 13:56:17,403 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 13:56:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 12627 transitions. [2021-11-23 13:56:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 13:56:17,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:17,416 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:17,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:56:17,416 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:17,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1949586207, now seen corresponding path program 2 times [2021-11-23 13:56:17,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:17,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736853680] [2021-11-23 13:56:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:17,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 13:56:17,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:17,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736853680] [2021-11-23 13:56:17,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736853680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:17,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:17,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:56:17,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69732945] [2021-11-23 13:56:17,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:17,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:56:17,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:56:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:56:17,512 INFO L87 Difference]: Start difference. First operand 7594 states and 12627 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 13:56:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:18,168 INFO L93 Difference]: Finished difference Result 14123 states and 23615 transitions. [2021-11-23 13:56:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:56:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 13:56:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:18,231 INFO L225 Difference]: With dead ends: 14123 [2021-11-23 13:56:18,231 INFO L226 Difference]: Without dead ends: 7672 [2021-11-23 13:56:18,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:56:18,244 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 539 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:18,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 544 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7672 states. [2021-11-23 13:56:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7672 to 7594. [2021-11-23 13:56:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7594 states, 7592 states have (on average 1.6451527924130664) internal successors, (12490), 7593 states have internal predecessors, (12490), 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 13:56:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 12490 transitions. [2021-11-23 13:56:18,810 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 12490 transitions. Word has length 63 [2021-11-23 13:56:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:18,811 INFO L470 AbstractCegarLoop]: Abstraction has 7594 states and 12490 transitions. [2021-11-23 13:56:18,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 13:56:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 12490 transitions. [2021-11-23 13:56:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 13:56:18,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:18,897 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] [2021-11-23 13:56:18,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:56:18,897 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash -417072628, now seen corresponding path program 1 times [2021-11-23 13:56:18,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:18,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805180399] [2021-11-23 13:56:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:18,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:18,972 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 13:56:18,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:18,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805180399] [2021-11-23 13:56:18,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805180399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:18,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:18,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:18,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685753775] [2021-11-23 13:56:18,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:18,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:18,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:18,976 INFO L87 Difference]: Start difference. First operand 7594 states and 12490 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 13:56:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:19,864 INFO L93 Difference]: Finished difference Result 20386 states and 33756 transitions. [2021-11-23 13:56:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:19,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 13:56:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:19,934 INFO L225 Difference]: With dead ends: 20386 [2021-11-23 13:56:19,935 INFO L226 Difference]: Without dead ends: 13783 [2021-11-23 13:56:19,952 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 13:56:19,954 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 147 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 378 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 13:56:19,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 378 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2021-11-23 13:56:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 13705. [2021-11-23 13:56:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13705 states, 13703 states have (on average 1.6269430051813472) internal successors, (22294), 13704 states have internal predecessors, (22294), 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 13:56:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13705 states to 13705 states and 22294 transitions. [2021-11-23 13:56:21,032 INFO L78 Accepts]: Start accepts. Automaton has 13705 states and 22294 transitions. Word has length 63 [2021-11-23 13:56:21,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:21,032 INFO L470 AbstractCegarLoop]: Abstraction has 13705 states and 22294 transitions. [2021-11-23 13:56:21,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 13:56:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 13705 states and 22294 transitions. [2021-11-23 13:56:21,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:56:21,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:21,045 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] [2021-11-23 13:56:21,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 13:56:21,046 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:21,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:21,046 INFO L85 PathProgramCache]: Analyzing trace with hash 933278186, now seen corresponding path program 1 times [2021-11-23 13:56:21,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:21,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067638723] [2021-11-23 13:56:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:21,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:21,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:21,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067638723] [2021-11-23 13:56:21,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067638723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:21,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:21,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:21,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374326943] [2021-11-23 13:56:21,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:21,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:21,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:21,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:21,106 INFO L87 Difference]: Start difference. First operand 13705 states and 22294 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 13:56:22,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:22,354 INFO L93 Difference]: Finished difference Result 37798 states and 61728 transitions. [2021-11-23 13:56:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:22,355 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 13:56:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:22,466 INFO L225 Difference]: With dead ends: 37798 [2021-11-23 13:56:22,466 INFO L226 Difference]: Without dead ends: 25444 [2021-11-23 13:56:22,495 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 13:56:22,496 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 145 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 378 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 13:56:22,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 378 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25444 states. [2021-11-23 13:56:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25444 to 25366. [2021-11-23 13:56:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25366 states, 25364 states have (on average 1.6052278820375334) internal successors, (40715), 25365 states have internal predecessors, (40715), 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 13:56:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25366 states to 25366 states and 40715 transitions. [2021-11-23 13:56:24,227 INFO L78 Accepts]: Start accepts. Automaton has 25366 states and 40715 transitions. Word has length 64 [2021-11-23 13:56:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:24,227 INFO L470 AbstractCegarLoop]: Abstraction has 25366 states and 40715 transitions. [2021-11-23 13:56:24,228 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 13:56:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 25366 states and 40715 transitions. [2021-11-23 13:56:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 13:56:24,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:24,242 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] [2021-11-23 13:56:24,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:56:24,242 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1361904338, now seen corresponding path program 1 times [2021-11-23 13:56:24,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:24,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438295067] [2021-11-23 13:56:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:24,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:24,311 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 13:56:24,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:24,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438295067] [2021-11-23 13:56:24,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438295067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:24,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:24,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:24,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190217319] [2021-11-23 13:56:24,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:24,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:56:24,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:56:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:56:24,314 INFO L87 Difference]: Start difference. First operand 25366 states and 40715 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 13:56:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:25,841 INFO L93 Difference]: Finished difference Result 47951 states and 76839 transitions. [2021-11-23 13:56:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:56:25,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-23 13:56:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:26,001 INFO L225 Difference]: With dead ends: 47951 [2021-11-23 13:56:26,002 INFO L226 Difference]: Without dead ends: 47873 [2021-11-23 13:56:26,020 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 13:56:26,021 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 143 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 378 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 13:56:26,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 378 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47873 states. [2021-11-23 13:56:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47873 to 47795. [2021-11-23 13:56:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47795 states, 47793 states have (on average 1.580210491076099) internal successors, (75523), 47794 states have internal predecessors, (75523), 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 13:56:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47795 states to 47795 states and 75523 transitions. [2021-11-23 13:56:28,325 INFO L78 Accepts]: Start accepts. Automaton has 47795 states and 75523 transitions. Word has length 65 [2021-11-23 13:56:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:28,326 INFO L470 AbstractCegarLoop]: Abstraction has 47795 states and 75523 transitions. [2021-11-23 13:56:28,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 13:56:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 47795 states and 75523 transitions. [2021-11-23 13:56:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 13:56:28,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:28,341 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:28,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 13:56:28,341 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:28,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1558867812, now seen corresponding path program 1 times [2021-11-23 13:56:28,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:28,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895930878] [2021-11-23 13:56:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:28,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:56:28,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:28,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895930878] [2021-11-23 13:56:28,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895930878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:28,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:28,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:56:28,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603283229] [2021-11-23 13:56:28,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:28,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:56:28,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:56:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:56:28,414 INFO L87 Difference]: Start difference. First operand 47795 states and 75523 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:30,507 INFO L93 Difference]: Finished difference Result 93449 states and 148030 transitions. [2021-11-23 13:56:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:56:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 13:56:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:30,648 INFO L225 Difference]: With dead ends: 93449 [2021-11-23 13:56:30,648 INFO L226 Difference]: Without dead ends: 47839 [2021-11-23 13:56:30,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:56:30,712 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 538 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:30,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 544 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47839 states. [2021-11-23 13:56:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47839 to 47761. [2021-11-23 13:56:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47761 states, 47759 states have (on average 1.55874285474989) internal successors, (74444), 47760 states have internal predecessors, (74444), 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 13:56:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47761 states to 47761 states and 74444 transitions. [2021-11-23 13:56:33,041 INFO L78 Accepts]: Start accepts. Automaton has 47761 states and 74444 transitions. Word has length 66 [2021-11-23 13:56:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:33,041 INFO L470 AbstractCegarLoop]: Abstraction has 47761 states and 74444 transitions. [2021-11-23 13:56:33,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 47761 states and 74444 transitions. [2021-11-23 13:56:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 13:56:33,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:33,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:56:33,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 13:56:33,069 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1155702472, now seen corresponding path program 1 times [2021-11-23 13:56:33,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:33,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251105726] [2021-11-23 13:56:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:33,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:33,209 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 13:56:33,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251105726] [2021-11-23 13:56:33,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251105726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:33,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:33,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 13:56:33,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441914179] [2021-11-23 13:56:33,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:33,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:56:33,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:56:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:56:33,213 INFO L87 Difference]: Start difference. First operand 47761 states and 74444 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 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 13:56:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:36,297 INFO L93 Difference]: Finished difference Result 48286 states and 75134 transitions. [2021-11-23 13:56:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 13:56:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 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 66 [2021-11-23 13:56:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:36,413 INFO L225 Difference]: With dead ends: 48286 [2021-11-23 13:56:36,413 INFO L226 Difference]: Without dead ends: 48231 [2021-11-23 13:56:36,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 13:56:36,429 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 1537 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:36,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1671 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:56:36,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48231 states. [2021-11-23 13:56:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48231 to 47802. [2021-11-23 13:56:38,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47802 states, 47800 states have (on average 1.5585355648535564) internal successors, (74498), 47801 states have internal predecessors, (74498), 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 13:56:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47802 states to 47802 states and 74498 transitions. [2021-11-23 13:56:38,896 INFO L78 Accepts]: Start accepts. Automaton has 47802 states and 74498 transitions. Word has length 66 [2021-11-23 13:56:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:38,896 INFO L470 AbstractCegarLoop]: Abstraction has 47802 states and 74498 transitions. [2021-11-23 13:56:38,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 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 13:56:38,897 INFO L276 IsEmpty]: Start isEmpty. Operand 47802 states and 74498 transitions. [2021-11-23 13:56:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:56:38,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:38,908 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 13:56:38,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 13:56:38,909 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash 883975010, now seen corresponding path program 1 times [2021-11-23 13:56:38,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:38,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103348280] [2021-11-23 13:56:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:38,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:38,964 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 13:56:38,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:38,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103348280] [2021-11-23 13:56:38,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103348280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:38,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:38,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:56:38,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059282427] [2021-11-23 13:56:38,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:38,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:56:38,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:38,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:56:38,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:56:38,967 INFO L87 Difference]: Start difference. First operand 47802 states and 74498 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 13:56:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:43,079 INFO L93 Difference]: Finished difference Result 93630 states and 146138 transitions. [2021-11-23 13:56:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:56:43,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 13:56:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:43,269 INFO L225 Difference]: With dead ends: 93630 [2021-11-23 13:56:43,269 INFO L226 Difference]: Without dead ends: 93536 [2021-11-23 13:56:43,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:56:43,290 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 318 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:43,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 742 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93536 states. [2021-11-23 13:56:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93536 to 93440. [2021-11-23 13:56:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93440 states, 93438 states have (on average 1.5612812774246023) internal successors, (145883), 93439 states have internal predecessors, (145883), 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 13:56:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93440 states to 93440 states and 145883 transitions. [2021-11-23 13:56:48,073 INFO L78 Accepts]: Start accepts. Automaton has 93440 states and 145883 transitions. Word has length 67 [2021-11-23 13:56:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:48,073 INFO L470 AbstractCegarLoop]: Abstraction has 93440 states and 145883 transitions. [2021-11-23 13:56:48,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 13:56:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 93440 states and 145883 transitions. [2021-11-23 13:56:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:56:48,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:48,088 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 13:56:48,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 13:56:48,089 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:48,090 INFO L85 PathProgramCache]: Analyzing trace with hash -203978808, now seen corresponding path program 1 times [2021-11-23 13:56:48,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:48,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556756267] [2021-11-23 13:56:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:48,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:48,148 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 13:56:48,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:48,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556756267] [2021-11-23 13:56:48,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556756267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:48,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:48,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 13:56:48,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449620085] [2021-11-23 13:56:48,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:48,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:56:48,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:56:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:56:48,151 INFO L87 Difference]: Start difference. First operand 93440 states and 145883 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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 13:56:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:52,456 INFO L93 Difference]: Finished difference Result 93736 states and 146270 transitions. [2021-11-23 13:56:52,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:56:52,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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 13:56:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:52,662 INFO L225 Difference]: With dead ends: 93736 [2021-11-23 13:56:52,662 INFO L226 Difference]: Without dead ends: 93538 [2021-11-23 13:56:52,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:56:52,690 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 405 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:52,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 633 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:56:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93538 states.