./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product31.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_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/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_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/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_25cb01dd-a512-433f-a5a2-b1ddd604b721/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 beb678f648eb46083c76f273f6eef79e0abada1343858eba26829a720997a379 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:11:32,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:11:32,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:11:32,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:11:32,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:11:32,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:11:32,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:11:32,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:11:32,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:11:32,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:11:32,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:11:32,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:11:32,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:11:32,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:11:32,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:11:32,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:11:32,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:11:32,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:11:32,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:11:32,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:11:32,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:11:32,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:11:32,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:11:32,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:11:32,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:11:32,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:11:32,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:11:32,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:11:32,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:11:32,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:11:32,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:11:32,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:11:32,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:11:32,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:11:32,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:11:32,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:11:32,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:11:32,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:11:32,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:11:32,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:11:32,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:11:32,328 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:11:32,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:11:32,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:11:32,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:11:32,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:11:32,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:11:32,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:11:32,388 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:11:32,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:11:32,389 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:11:32,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:11:32,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:11:32,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:11:32,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:11:32,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:11:32,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:11:32,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:11:32,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:11:32,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:11:32,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:11:32,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:11:32,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:11:32,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:11:32,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:11:32,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:11:32,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:11:32,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:11:32,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:11:32,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:11:32,394 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:11:32,394 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:11:32,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:11:32,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:11:32,395 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_25cb01dd-a512-433f-a5a2-b1ddd604b721/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> beb678f648eb46083c76f273f6eef79e0abada1343858eba26829a720997a379 [2021-11-23 13:11:32,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:11:32,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:11:32,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:11:32,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:11:32,721 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:11:32,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/product-lines/email_spec3_product31.cil.c [2021-11-23 13:11:32,813 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/data/931a45e39/5858d3d8a8fc42dca4f748cea1136430/FLAGb21683663 [2021-11-23 13:11:33,482 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:11:33,483 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/sv-benchmarks/c/product-lines/email_spec3_product31.cil.c [2021-11-23 13:11:33,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/data/931a45e39/5858d3d8a8fc42dca4f748cea1136430/FLAGb21683663 [2021-11-23 13:11:33,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/data/931a45e39/5858d3d8a8fc42dca4f748cea1136430 [2021-11-23 13:11:33,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:11:33,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:11:33,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:11:33,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:11:33,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:11:33,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:11:33" (1/1) ... [2021-11-23 13:11:33,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53fa23b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:33, skipping insertion in model container [2021-11-23 13:11:33,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:11:33" (1/1) ... [2021-11-23 13:11:33,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:11:33,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:11:34,475 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_25cb01dd-a512-433f-a5a2-b1ddd604b721/sv-benchmarks/c/product-lines/email_spec3_product31.cil.c[42138,42151] [2021-11-23 13:11:34,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:11:34,592 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:11:34,680 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_25cb01dd-a512-433f-a5a2-b1ddd604b721/sv-benchmarks/c/product-lines/email_spec3_product31.cil.c[42138,42151] [2021-11-23 13:11:34,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:11:34,750 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:11:34,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34 WrapperNode [2021-11-23 13:11:34,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:11:34,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:11:34,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:11:34,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:11:34,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:34,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:34,944 INFO L137 Inliner]: procedures = 132, calls = 227, calls flagged for inlining = 134, calls inlined = 197, statements flattened = 3129 [2021-11-23 13:11:34,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:11:34,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:11:34,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:11:34,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:11:34,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:34,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:34,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:34,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:35,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:35,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:35,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:35,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:11:35,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:11:35,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:11:35,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:11:35,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (1/1) ... [2021-11-23 13:11:35,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:11:35,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:11:35,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:11:35,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:11:35,263 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 13:11:35,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:11:35,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:11:35,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:11:35,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:11:35,593 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:11:35,595 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:11:37,196 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:11:37,219 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:11:37,220 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 13:11:37,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:11:37 BoogieIcfgContainer [2021-11-23 13:11:37,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:11:37,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:11:37,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:11:37,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:11:37,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:11:33" (1/3) ... [2021-11-23 13:11:37,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452cba30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:11:37, skipping insertion in model container [2021-11-23 13:11:37,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:34" (2/3) ... [2021-11-23 13:11:37,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452cba30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:11:37, skipping insertion in model container [2021-11-23 13:11:37,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:11:37" (3/3) ... [2021-11-23 13:11:37,235 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product31.cil.c [2021-11-23 13:11:37,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:11:37,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-23 13:11:37,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:11:37,339 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 13:11:37,339 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-23 13:11:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 656 states, 651 states have (on average 1.6820276497695852) internal successors, (1095), 655 states have internal predecessors, (1095), 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 13:11:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:11:37,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:37,399 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 13:11:37,399 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1175641531, now seen corresponding path program 1 times [2021-11-23 13:11:37,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:37,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480176373] [2021-11-23 13:11:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:37,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:37,755 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 13:11:37,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480176373] [2021-11-23 13:11:37,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480176373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:37,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:37,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:37,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928785607] [2021-11-23 13:11:37,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:37,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:37,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:37,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:37,838 INFO L87 Difference]: Start difference. First operand has 656 states, 651 states have (on average 1.6820276497695852) internal successors, (1095), 655 states have internal predecessors, (1095), 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 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 13:11:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:38,096 INFO L93 Difference]: Finished difference Result 1919 states and 3213 transitions. [2021-11-23 13:11:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:38,099 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 13:11:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:38,125 INFO L225 Difference]: With dead ends: 1919 [2021-11-23 13:11:38,125 INFO L226 Difference]: Without dead ends: 1087 [2021-11-23 13:11:38,133 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 13:11:38,137 INFO L933 BasicCegarLoop]: 2129 mSDtfsCounter, 1060 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 3184 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 13:11:38,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 3184 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-11-23 13:11:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 554. [2021-11-23 13:11:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 550 states have (on average 1.690909090909091) internal successors, (930), 553 states have internal predecessors, (930), 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 13:11:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 930 transitions. [2021-11-23 13:11:38,238 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 930 transitions. Word has length 64 [2021-11-23 13:11:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:38,239 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 930 transitions. [2021-11-23 13:11:38,239 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 13:11:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 930 transitions. [2021-11-23 13:11:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 13:11:38,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:38,244 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 13:11:38,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:11:38,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:38,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1375955456, now seen corresponding path program 1 times [2021-11-23 13:11:38,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:38,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836590813] [2021-11-23 13:11:38,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:38,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:38,422 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 13:11:38,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:38,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836590813] [2021-11-23 13:11:38,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836590813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:38,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:38,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:11:38,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725093857] [2021-11-23 13:11:38,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:38,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:11:38,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:38,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:11:38,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:11:38,432 INFO L87 Difference]: Start difference. First operand 554 states and 930 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 13:11:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:38,666 INFO L93 Difference]: Finished difference Result 1603 states and 2698 transitions. [2021-11-23 13:11:38,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:11:38,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 13:11:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:38,676 INFO L225 Difference]: With dead ends: 1603 [2021-11-23 13:11:38,676 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 13:11:38,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:11:38,684 INFO L933 BasicCegarLoop]: 1768 mSDtfsCounter, 1814 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:38,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1814 Valid, 4412 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:11:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 13:11:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 554. [2021-11-23 13:11:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 550 states have (on average 1.6890909090909092) internal successors, (929), 553 states have internal predecessors, (929), 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 13:11:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 929 transitions. [2021-11-23 13:11:38,750 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 929 transitions. Word has length 66 [2021-11-23 13:11:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:38,752 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 929 transitions. [2021-11-23 13:11:38,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 13:11:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 929 transitions. [2021-11-23 13:11:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:11:38,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:38,764 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 13:11:38,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:11:38,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash 235236101, now seen corresponding path program 1 times [2021-11-23 13:11:38,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:38,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003423587] [2021-11-23 13:11:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:38,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:38,918 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 13:11:38,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:38,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003423587] [2021-11-23 13:11:38,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003423587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:38,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:38,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:38,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756986990] [2021-11-23 13:11:38,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:38,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:38,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:38,930 INFO L87 Difference]: Start difference. First operand 554 states and 929 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:38,982 INFO L93 Difference]: Finished difference Result 1087 states and 1829 transitions. [2021-11-23 13:11:38,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:38,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 13:11:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:38,988 INFO L225 Difference]: With dead ends: 1087 [2021-11-23 13:11:38,988 INFO L226 Difference]: Without dead ends: 561 [2021-11-23 13:11:38,990 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 13:11:38,998 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 902 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 955 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 13:11:38,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 955 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-23 13:11:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 554. [2021-11-23 13:11:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 550 states have (on average 1.6836363636363636) internal successors, (926), 553 states have internal predecessors, (926), 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 13:11:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 926 transitions. [2021-11-23 13:11:39,030 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 926 transitions. Word has length 67 [2021-11-23 13:11:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:39,031 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 926 transitions. [2021-11-23 13:11:39,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 926 transitions. [2021-11-23 13:11:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 13:11:39,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:39,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:39,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:11:39,035 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash 441280618, now seen corresponding path program 1 times [2021-11-23 13:11:39,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905365495] [2021-11-23 13:11:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:39,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:39,162 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 13:11:39,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:39,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905365495] [2021-11-23 13:11:39,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905365495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:39,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:39,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:11:39,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549500511] [2021-11-23 13:11:39,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:39,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:11:39,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:39,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:11:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:11:39,164 INFO L87 Difference]: Start difference. First operand 554 states and 926 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:39,345 INFO L93 Difference]: Finished difference Result 1590 states and 2675 transitions. [2021-11-23 13:11:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:11:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 13:11:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:39,353 INFO L225 Difference]: With dead ends: 1590 [2021-11-23 13:11:39,353 INFO L226 Difference]: Without dead ends: 1069 [2021-11-23 13:11:39,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:11:39,356 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 4381 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4381 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:39,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4381 Valid, 1833 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:11:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-11-23 13:11:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 554. [2021-11-23 13:11:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 550 states have (on average 1.6818181818181819) internal successors, (925), 553 states have internal predecessors, (925), 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 13:11:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 925 transitions. [2021-11-23 13:11:39,398 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 925 transitions. Word has length 69 [2021-11-23 13:11:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:39,398 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 925 transitions. [2021-11-23 13:11:39,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 925 transitions. [2021-11-23 13:11:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 13:11:39,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:39,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:39,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:11:39,402 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:39,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash -358255205, now seen corresponding path program 1 times [2021-11-23 13:11:39,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:39,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575451399] [2021-11-23 13:11:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:39,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:39,472 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 13:11:39,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:39,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575451399] [2021-11-23 13:11:39,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575451399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:39,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:39,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:11:39,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997309683] [2021-11-23 13:11:39,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:39,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:11:39,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:11:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:11:39,475 INFO L87 Difference]: Start difference. First operand 554 states and 925 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:39,711 INFO L93 Difference]: Finished difference Result 1597 states and 2681 transitions. [2021-11-23 13:11:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:11:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 13:11:39,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:39,720 INFO L225 Difference]: With dead ends: 1597 [2021-11-23 13:11:39,720 INFO L226 Difference]: Without dead ends: 1076 [2021-11-23 13:11:39,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:11:39,723 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 4385 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4385 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:39,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4385 Valid, 1836 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:11:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-11-23 13:11:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 554. [2021-11-23 13:11:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 550 states have (on average 1.68) internal successors, (924), 553 states have internal predecessors, (924), 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 13:11:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 924 transitions. [2021-11-23 13:11:39,777 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 924 transitions. Word has length 70 [2021-11-23 13:11:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:39,778 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 924 transitions. [2021-11-23 13:11:39,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 924 transitions. [2021-11-23 13:11:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 13:11:39,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:39,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:39,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:11:39,781 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash -202564251, now seen corresponding path program 1 times [2021-11-23 13:11:39,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:39,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554311214] [2021-11-23 13:11:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:39,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:39,843 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 13:11:39,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:39,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554311214] [2021-11-23 13:11:39,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554311214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:39,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:39,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:39,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596692644] [2021-11-23 13:11:39,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:39,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:39,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:39,846 INFO L87 Difference]: Start difference. First operand 554 states and 924 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:39,898 INFO L93 Difference]: Finished difference Result 853 states and 1407 transitions. [2021-11-23 13:11:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:39,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 13:11:39,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:39,903 INFO L225 Difference]: With dead ends: 853 [2021-11-23 13:11:39,904 INFO L226 Difference]: Without dead ends: 557 [2021-11-23 13:11:39,905 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 13:11:39,906 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 1 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1842 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 13:11:39,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1842 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-23 13:11:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 556. [2021-11-23 13:11:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 552 states have (on average 1.6775362318840579) internal successors, (926), 555 states have internal predecessors, (926), 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 13:11:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 926 transitions. [2021-11-23 13:11:39,949 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 926 transitions. Word has length 71 [2021-11-23 13:11:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:39,949 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 926 transitions. [2021-11-23 13:11:39,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 926 transitions. [2021-11-23 13:11:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 13:11:39,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:39,952 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:39,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:11:39,952 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash 996985479, now seen corresponding path program 1 times [2021-11-23 13:11:39,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:39,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267145100] [2021-11-23 13:11:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:39,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:40,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:40,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267145100] [2021-11-23 13:11:40,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267145100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:40,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:40,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:40,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228904799] [2021-11-23 13:11:40,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:40,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:40,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:40,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:40,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:40,011 INFO L87 Difference]: Start difference. First operand 556 states and 926 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 13:11:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:40,105 INFO L93 Difference]: Finished difference Result 1540 states and 2588 transitions. [2021-11-23 13:11:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 77 [2021-11-23 13:11:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:40,114 INFO L225 Difference]: With dead ends: 1540 [2021-11-23 13:11:40,114 INFO L226 Difference]: Without dead ends: 1022 [2021-11-23 13:11:40,116 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 13:11:40,117 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 874 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1748 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 13:11:40,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 1748 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-11-23 13:11:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 726. [2021-11-23 13:11:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 722 states have (on average 1.7022160664819945) internal successors, (1229), 725 states have internal predecessors, (1229), 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 13:11:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1229 transitions. [2021-11-23 13:11:40,180 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1229 transitions. Word has length 77 [2021-11-23 13:11:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:40,181 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1229 transitions. [2021-11-23 13:11:40,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 13:11:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1229 transitions. [2021-11-23 13:11:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 13:11:40,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:40,183 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:40,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:11:40,184 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:40,185 INFO L85 PathProgramCache]: Analyzing trace with hash 248033017, now seen corresponding path program 1 times [2021-11-23 13:11:40,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:40,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579635580] [2021-11-23 13:11:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:40,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:40,245 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 13:11:40,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:40,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579635580] [2021-11-23 13:11:40,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579635580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:11:40,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156555162] [2021-11-23 13:11:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:40,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:11:40,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:11:40,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:11:40,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:11:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:40,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:11:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:40,757 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 13:11:40,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:40,929 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 13:11:40,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156555162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:40,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:11:40,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 13:11:40,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413294822] [2021-11-23 13:11:40,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:40,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:11:40,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:11:40,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:11:40,951 INFO L87 Difference]: Start difference. First operand 726 states and 1229 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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 13:11:41,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:41,198 INFO L93 Difference]: Finished difference Result 2918 states and 4953 transitions. [2021-11-23 13:11:41,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:11:41,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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 78 [2021-11-23 13:11:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:41,218 INFO L225 Difference]: With dead ends: 2918 [2021-11-23 13:11:41,218 INFO L226 Difference]: Without dead ends: 2622 [2021-11-23 13:11:41,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 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 13:11:41,221 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 2624 mSDsluCounter, 4510 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2624 SdHoareTripleChecker+Valid, 5432 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:41,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2624 Valid, 5432 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-11-23 13:11:41,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1734. [2021-11-23 13:11:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1730 states have (on average 1.7520231213872832) internal successors, (3031), 1733 states have internal predecessors, (3031), 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 13:11:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 3031 transitions. [2021-11-23 13:11:41,373 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 3031 transitions. Word has length 78 [2021-11-23 13:11:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:41,373 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 3031 transitions. [2021-11-23 13:11:41,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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 13:11:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 3031 transitions. [2021-11-23 13:11:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 13:11:41,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:41,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:41,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:41,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb01dd-a512-433f-a5a2-b1ddd604b721/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:11:41,607 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash -791110900, now seen corresponding path program 1 times [2021-11-23 13:11:41,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:41,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234467767] [2021-11-23 13:11:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:41,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:41,664 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 13:11:41,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:41,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234467767] [2021-11-23 13:11:41,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234467767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:41,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:41,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:41,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990594871] [2021-11-23 13:11:41,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:41,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:41,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:41,667 INFO L87 Difference]: Start difference. First operand 1734 states and 3031 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 13:11:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:41,865 INFO L93 Difference]: Finished difference Result 4669 states and 8179 transitions. [2021-11-23 13:11:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:41,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-23 13:11:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:41,887 INFO L225 Difference]: With dead ends: 4669 [2021-11-23 13:11:41,887 INFO L226 Difference]: Without dead ends: 3035 [2021-11-23 13:11:41,890 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 13:11:41,893 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 872 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1843 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 13:11:41,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 1843 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-11-23 13:11:42,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2739. [2021-11-23 13:11:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2735 states have (on average 1.7623400365630713) internal successors, (4820), 2738 states have internal predecessors, (4820), 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 13:11:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4820 transitions. [2021-11-23 13:11:42,106 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4820 transitions. Word has length 84 [2021-11-23 13:11:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:42,110 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 4820 transitions. [2021-11-23 13:11:42,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 13:11:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4820 transitions. [2021-11-23 13:11:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 13:11:42,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:42,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:42,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:11:42,118 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:42,119 INFO L85 PathProgramCache]: Analyzing trace with hash -887721780, now seen corresponding path program 1 times [2021-11-23 13:11:42,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:42,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177716556] [2021-11-23 13:11:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:42,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:42,183 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 13:11:42,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:42,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177716556] [2021-11-23 13:11:42,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177716556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:42,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:42,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:42,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913349475] [2021-11-23 13:11:42,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:42,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:42,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:42,186 INFO L87 Difference]: Start difference. First operand 2739 states and 4820 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 13:11:42,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:42,470 INFO L93 Difference]: Finished difference Result 7161 states and 12626 transitions. [2021-11-23 13:11:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:42,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-23 13:11:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:42,504 INFO L225 Difference]: With dead ends: 7161 [2021-11-23 13:11:42,504 INFO L226 Difference]: Without dead ends: 4612 [2021-11-23 13:11:42,509 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 13:11:42,510 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 870 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1834 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 13:11:42,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1834 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-11-23 13:11:42,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 4316. [2021-11-23 13:11:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4312 states have (on average 1.769016697588126) internal successors, (7628), 4315 states have internal predecessors, (7628), 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 13:11:42,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 7628 transitions. [2021-11-23 13:11:42,843 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 7628 transitions. Word has length 85 [2021-11-23 13:11:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:42,845 INFO L470 AbstractCegarLoop]: Abstraction has 4316 states and 7628 transitions. [2021-11-23 13:11:42,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 13:11:42,845 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 7628 transitions. [2021-11-23 13:11:42,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 13:11:42,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:42,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:42,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:11:42,858 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1224482154, now seen corresponding path program 1 times [2021-11-23 13:11:42,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:42,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912812986] [2021-11-23 13:11:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:42,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:42,941 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 13:11:42,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912812986] [2021-11-23 13:11:42,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912812986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:42,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:42,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:42,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145787999] [2021-11-23 13:11:42,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:42,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:42,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:42,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:42,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:42,945 INFO L87 Difference]: Start difference. First operand 4316 states and 7628 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 13:11:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:43,316 INFO L93 Difference]: Finished difference Result 10570 states and 18676 transitions. [2021-11-23 13:11:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:43,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 86 [2021-11-23 13:11:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:43,380 INFO L225 Difference]: With dead ends: 10570 [2021-11-23 13:11:43,380 INFO L226 Difference]: Without dead ends: 6801 [2021-11-23 13:11:43,387 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 13:11:43,388 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 868 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 1786 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 13:11:43,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 1786 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-11-23 13:11:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 6505. [2021-11-23 13:11:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6501 states have (on average 1.768804799261652) internal successors, (11499), 6504 states have internal predecessors, (11499), 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 13:11:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 11499 transitions. [2021-11-23 13:11:43,880 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 11499 transitions. Word has length 86 [2021-11-23 13:11:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:43,880 INFO L470 AbstractCegarLoop]: Abstraction has 6505 states and 11499 transitions. [2021-11-23 13:11:43,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 13:11:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 11499 transitions. [2021-11-23 13:11:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 13:11:43,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:43,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:43,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:11:43,900 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:43,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:43,900 INFO L85 PathProgramCache]: Analyzing trace with hash -471458854, now seen corresponding path program 1 times [2021-11-23 13:11:43,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:43,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120304381] [2021-11-23 13:11:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:43,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:43,965 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 13:11:43,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:43,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120304381] [2021-11-23 13:11:43,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120304381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:43,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:43,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:43,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767921477] [2021-11-23 13:11:43,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:43,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:43,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:43,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:43,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:43,968 INFO L87 Difference]: Start difference. First operand 6505 states and 11499 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 13:11:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:44,515 INFO L93 Difference]: Finished difference Result 15568 states and 27503 transitions. [2021-11-23 13:11:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:44,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2021-11-23 13:11:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:44,542 INFO L225 Difference]: With dead ends: 15568 [2021-11-23 13:11:44,542 INFO L226 Difference]: Without dead ends: 10184 [2021-11-23 13:11:44,551 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 13:11:44,552 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 866 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1786 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 13:11:44,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 1786 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-11-23 13:11:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9888. [2021-11-23 13:11:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9888 states, 9884 states have (on average 1.7664912990692028) internal successors, (17460), 9887 states have internal predecessors, (17460), 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 13:11:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9888 states to 9888 states and 17460 transitions. [2021-11-23 13:11:45,162 INFO L78 Accepts]: Start accepts. Automaton has 9888 states and 17460 transitions. Word has length 87 [2021-11-23 13:11:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:45,162 INFO L470 AbstractCegarLoop]: Abstraction has 9888 states and 17460 transitions. [2021-11-23 13:11:45,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 13:11:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 9888 states and 17460 transitions. [2021-11-23 13:11:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 13:11:45,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:45,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:45,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:11:45,182 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1810266534, now seen corresponding path program 1 times [2021-11-23 13:11:45,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:45,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473029806] [2021-11-23 13:11:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:45,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:45,241 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 13:11:45,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473029806] [2021-11-23 13:11:45,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473029806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:45,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:45,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:45,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127393344] [2021-11-23 13:11:45,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:45,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:45,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:45,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:45,244 INFO L87 Difference]: Start difference. First operand 9888 states and 17460 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 13:11:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:46,071 INFO L93 Difference]: Finished difference Result 24788 states and 43842 transitions. [2021-11-23 13:11:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 88 [2021-11-23 13:11:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:46,131 INFO L225 Difference]: With dead ends: 24788 [2021-11-23 13:11:46,131 INFO L226 Difference]: Without dead ends: 16549 [2021-11-23 13:11:46,150 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 13:11:46,151 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 864 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1834 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 13:11:46,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 1834 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16549 states. [2021-11-23 13:11:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16549 to 16253. [2021-11-23 13:11:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16253 states, 16249 states have (on average 1.7676164687057665) internal successors, (28722), 16252 states have internal predecessors, (28722), 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 13:11:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16253 states to 16253 states and 28722 transitions. [2021-11-23 13:11:47,281 INFO L78 Accepts]: Start accepts. Automaton has 16253 states and 28722 transitions. Word has length 88 [2021-11-23 13:11:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:47,282 INFO L470 AbstractCegarLoop]: Abstraction has 16253 states and 28722 transitions. [2021-11-23 13:11:47,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 13:11:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 16253 states and 28722 transitions. [2021-11-23 13:11:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 13:11:47,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:47,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:47,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:11:47,308 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1843311338, now seen corresponding path program 1 times [2021-11-23 13:11:47,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:47,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474577952] [2021-11-23 13:11:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:47,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:47,379 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 13:11:47,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:47,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474577952] [2021-11-23 13:11:47,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474577952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:47,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:47,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:47,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564632509] [2021-11-23 13:11:47,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:47,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:47,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:47,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:47,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:47,383 INFO L87 Difference]: Start difference. First operand 16253 states and 28722 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 13:11:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:48,518 INFO L93 Difference]: Finished difference Result 41555 states and 73662 transitions. [2021-11-23 13:11:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:48,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 89 [2021-11-23 13:11:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:48,610 INFO L225 Difference]: With dead ends: 41555 [2021-11-23 13:11:48,615 INFO L226 Difference]: Without dead ends: 27816 [2021-11-23 13:11:48,645 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 13:11:48,646 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 862 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1833 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 13:11:48,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1833 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27816 states. [2021-11-23 13:11:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27816 to 27520. [2021-11-23 13:11:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27520 states, 27516 states have (on average 1.7704608227940108) internal successors, (48716), 27519 states have internal predecessors, (48716), 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 13:11:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27520 states to 27520 states and 48716 transitions. [2021-11-23 13:11:50,310 INFO L78 Accepts]: Start accepts. Automaton has 27520 states and 48716 transitions. Word has length 89 [2021-11-23 13:11:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:50,311 INFO L470 AbstractCegarLoop]: Abstraction has 27520 states and 48716 transitions. [2021-11-23 13:11:50,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 13:11:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 27520 states and 48716 transitions. [2021-11-23 13:11:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 13:11:50,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:50,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:50,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 13:11:50,343 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:50,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1527182284, now seen corresponding path program 1 times [2021-11-23 13:11:50,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:50,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779695314] [2021-11-23 13:11:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:50,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:50,400 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 13:11:50,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:50,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779695314] [2021-11-23 13:11:50,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779695314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:50,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:50,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:50,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286442025] [2021-11-23 13:11:50,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:50,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:50,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:50,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:50,405 INFO L87 Difference]: Start difference. First operand 27520 states and 48716 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 13:11:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:51,973 INFO L93 Difference]: Finished difference Result 73385 states and 130097 transitions. [2021-11-23 13:11:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:51,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 90 [2021-11-23 13:11:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:52,121 INFO L225 Difference]: With dead ends: 73385 [2021-11-23 13:11:52,122 INFO L226 Difference]: Without dead ends: 49311 [2021-11-23 13:11:52,167 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 13:11:52,168 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 860 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1842 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 13:11:52,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 1842 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49311 states. [2021-11-23 13:11:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49311 to 49015. [2021-11-23 13:11:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49015 states, 49011 states have (on average 1.7689090204239863) internal successors, (86696), 49014 states have internal predecessors, (86696), 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 13:11:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49015 states to 49015 states and 86696 transitions. [2021-11-23 13:11:54,563 INFO L78 Accepts]: Start accepts. Automaton has 49015 states and 86696 transitions. Word has length 90 [2021-11-23 13:11:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:54,563 INFO L470 AbstractCegarLoop]: Abstraction has 49015 states and 86696 transitions. [2021-11-23 13:11:54,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 13:11:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 49015 states and 86696 transitions. [2021-11-23 13:11:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 13:11:54,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:54,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:54,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:11:54,602 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:11:54,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:54,606 INFO L85 PathProgramCache]: Analyzing trace with hash 422940726, now seen corresponding path program 1 times [2021-11-23 13:11:54,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:54,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610173670] [2021-11-23 13:11:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:54,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:54,666 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 13:11:54,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:54,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610173670] [2021-11-23 13:11:54,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610173670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:54,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:54,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:11:54,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017001814] [2021-11-23 13:11:54,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:54,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:54,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:54,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:54,669 INFO L87 Difference]: Start difference. First operand 49015 states and 86696 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 13:11:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:57,423 INFO L93 Difference]: Finished difference Result 125518 states and 221937 transitions. [2021-11-23 13:11:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2021-11-23 13:11:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:57,620 INFO L225 Difference]: With dead ends: 125518 [2021-11-23 13:11:57,621 INFO L226 Difference]: Without dead ends: 82252 [2021-11-23 13:11:57,668 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 13:11:57,669 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 858 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1786 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 13:11:57,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 1786 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82252 states. [2021-11-23 13:12:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82252 to 81956. [2021-11-23 13:12:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81956 states, 81952 states have (on average 1.762861187036314) internal successors, (144470), 81955 states have internal predecessors, (144470), 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 13:12:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81956 states to 81956 states and 144470 transitions. [2021-11-23 13:12:01,375 INFO L78 Accepts]: Start accepts. Automaton has 81956 states and 144470 transitions. Word has length 91 [2021-11-23 13:12:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:01,375 INFO L470 AbstractCegarLoop]: Abstraction has 81956 states and 144470 transitions. [2021-11-23 13:12:01,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 13:12:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 81956 states and 144470 transitions. [2021-11-23 13:12:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 13:12:01,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:01,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:01,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 13:12:01,404 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:12:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash -657856022, now seen corresponding path program 1 times [2021-11-23 13:12:01,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:01,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57277598] [2021-11-23 13:12:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:01,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:01,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:01,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57277598] [2021-11-23 13:12:01,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57277598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:01,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:01,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:12:01,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840365389] [2021-11-23 13:12:01,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:01,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:12:01,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:01,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:12:01,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:12:01,455 INFO L87 Difference]: Start difference. First operand 81956 states and 144470 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 13:12:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:06,546 INFO L93 Difference]: Finished difference Result 225935 states and 399439 transitions. [2021-11-23 13:12:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:12:06,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 92 [2021-11-23 13:12:06,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:06,830 INFO L225 Difference]: With dead ends: 225935 [2021-11-23 13:12:06,830 INFO L226 Difference]: Without dead ends: 151356 [2021-11-23 13:12:06,908 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 13:12:06,910 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 856 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1833 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 13:12:06,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 1833 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151356 states. [2021-11-23 13:12:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151356 to 151060. [2021-11-23 13:12:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151060 states, 151056 states have (on average 1.7652393814214595) internal successors, (266650), 151059 states have internal predecessors, (266650), 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 13:12:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151060 states to 151060 states and 266650 transitions. [2021-11-23 13:12:13,758 INFO L78 Accepts]: Start accepts. Automaton has 151060 states and 266650 transitions. Word has length 92 [2021-11-23 13:12:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:13,758 INFO L470 AbstractCegarLoop]: Abstraction has 151060 states and 266650 transitions. [2021-11-23 13:12:13,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 13:12:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 151060 states and 266650 transitions. [2021-11-23 13:12:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 13:12:13,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:13,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:13,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 13:12:13,790 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 13:12:13,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:13,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1370101190, now seen corresponding path program 1 times [2021-11-23 13:12:13,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:13,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822909389] [2021-11-23 13:12:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:13,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:13,846 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 13:12:13,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822909389] [2021-11-23 13:12:13,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822909389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:13,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:13,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:12:13,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809261409] [2021-11-23 13:12:13,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:13,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:12:13,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:12:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:12:13,850 INFO L87 Difference]: Start difference. First operand 151060 states and 266650 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 13:12:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:21,258 INFO L93 Difference]: Finished difference Result 258302 states and 454667 transitions. [2021-11-23 13:12:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:12:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 93 [2021-11-23 13:12:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:22,124 INFO L225 Difference]: With dead ends: 258302 [2021-11-23 13:12:22,124 INFO L226 Difference]: Without dead ends: 258006 [2021-11-23 13:12:22,187 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 13:12:22,188 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 854 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1786 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 13:12:22,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 1786 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258006 states.