./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX --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 646f5b113c7a3ad2f4a2522272ad1b8889776081b2b5bc43fffe0e887ddc48f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:48:41,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:48:41,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:48:41,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:48:41,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:48:41,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:48:41,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:48:41,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:48:41,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:48:41,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:48:41,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:48:41,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:48:41,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:48:41,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:48:41,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:48:41,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:48:41,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:48:41,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:48:41,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:48:41,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:48:41,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:48:41,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:48:41,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:48:41,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:48:41,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:48:41,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:48:41,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:48:41,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:48:41,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:48:41,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:48:41,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:48:41,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:48:41,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:48:41,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:48:41,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:48:41,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:48:41,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:48:41,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:48:41,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:48:41,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:48:41,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:48:41,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:48:41,245 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:48:41,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:48:41,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:48:41,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:48:41,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:48:41,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:48:41,249 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:48:41,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:48:41,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:48:41,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:48:41,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:48:41,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:48:41,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:48:41,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:48:41,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:48:41,252 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:48:41,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:48:41,252 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:48:41,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:48:41,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:48:41,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:48:41,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:48:41,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:48:41,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:48:41,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:48:41,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:48:41,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:48:41,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:48:41,255 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:48:41,256 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:48:41,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:48:41,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:48:41,257 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_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 646f5b113c7a3ad2f4a2522272ad1b8889776081b2b5bc43fffe0e887ddc48f7 [2021-11-09 10:48:41,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:48:41,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:48:41,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:48:41,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:48:41,571 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:48:41,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/product-lines/email_spec0_product22.cil.c [2021-11-09 10:48:41,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/data/dd2b4d663/0961716b35ab43bbb90439e7fced4ad4/FLAGd8141c3ff [2021-11-09 10:48:42,500 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:48:42,501 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/sv-benchmarks/c/product-lines/email_spec0_product22.cil.c [2021-11-09 10:48:42,527 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/data/dd2b4d663/0961716b35ab43bbb90439e7fced4ad4/FLAGd8141c3ff [2021-11-09 10:48:42,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/data/dd2b4d663/0961716b35ab43bbb90439e7fced4ad4 [2021-11-09 10:48:42,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:48:42,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:48:42,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:48:42,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:48:42,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:48:42,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:42" (1/1) ... [2021-11-09 10:48:42,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a278664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:42, skipping insertion in model container [2021-11-09 10:48:42,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:42" (1/1) ... [2021-11-09 10:48:42,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:48:42,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:48:42,886 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/sv-benchmarks/c/product-lines/email_spec0_product22.cil.c[4724,4737] [2021-11-09 10:48:43,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:48:43,388 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:48:43,407 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/sv-benchmarks/c/product-lines/email_spec0_product22.cil.c[4724,4737] [2021-11-09 10:48:43,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:48:43,574 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:48:43,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43 WrapperNode [2021-11-09 10:48:43,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:48:43,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:48:43,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:48:43,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:48:43,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:48:43,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:48:43,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:48:43,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:48:43,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:48:43,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:48:43,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:48:43,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:48:43,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (1/1) ... [2021-11-09 10:48:43,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:48:43,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:43,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:48:43,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:48:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-09 10:48:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:48:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:48:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:48:43,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:48:46,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:48:46,371 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-09 10:48:46,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:46 BoogieIcfgContainer [2021-11-09 10:48:46,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:48:46,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:48:46,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:48:46,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:48:46,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:48:42" (1/3) ... [2021-11-09 10:48:46,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dfd51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:46, skipping insertion in model container [2021-11-09 10:48:46,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:43" (2/3) ... [2021-11-09 10:48:46,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dfd51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:46, skipping insertion in model container [2021-11-09 10:48:46,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:46" (3/3) ... [2021-11-09 10:48:46,388 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product22.cil.c [2021-11-09 10:48:46,394 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:48:46,394 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 10:48:46,469 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:48:46,478 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 [2021-11-09 10:48:46,478 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 10:48:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 475 states, 472 states have (on average 1.7394067796610169) internal successors, (821), 474 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 10:48:46,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:46,545 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:46,545 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash -969793478, now seen corresponding path program 1 times [2021-11-09 10:48:46,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:46,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541212489] [2021-11-09 10:48:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:46,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:47,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:47,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541212489] [2021-11-09 10:48:47,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541212489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:47,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:47,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:47,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340783518] [2021-11-09 10:48:47,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:47,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:47,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:47,159 INFO L87 Difference]: Start difference. First operand has 475 states, 472 states have (on average 1.7394067796610169) internal successors, (821), 474 states have internal predecessors, (821), 0 states have call successors, (0), 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 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:47,333 INFO L93 Difference]: Finished difference Result 1390 states and 2405 transitions. [2021-11-09 10:48:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:47,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 10:48:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:47,356 INFO L225 Difference]: With dead ends: 1390 [2021-11-09 10:48:47,357 INFO L226 Difference]: Without dead ends: 874 [2021-11-09 10:48:47,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-11-09 10:48:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 446. [2021-11-09 10:48:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.731981981981982) internal successors, (769), 445 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 769 transitions. [2021-11-09 10:48:47,442 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 769 transitions. Word has length 58 [2021-11-09 10:48:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:47,443 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 769 transitions. [2021-11-09 10:48:47,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 769 transitions. [2021-11-09 10:48:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 10:48:47,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:47,447 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:47,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:48:47,448 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash 543345741, now seen corresponding path program 1 times [2021-11-09 10:48:47,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:47,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109463039] [2021-11-09 10:48:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:47,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:47,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:47,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109463039] [2021-11-09 10:48:47,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109463039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:47,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:47,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:48:47,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051781507] [2021-11-09 10:48:47,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:48:47,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:48:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:47,574 INFO L87 Difference]: Start difference. First operand 446 states and 769 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:47,840 INFO L93 Difference]: Finished difference Result 1287 states and 2223 transitions. [2021-11-09 10:48:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:48:47,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 10:48:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:47,847 INFO L225 Difference]: With dead ends: 1287 [2021-11-09 10:48:47,848 INFO L226 Difference]: Without dead ends: 860 [2021-11-09 10:48:47,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:48:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-11-09 10:48:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 446. [2021-11-09 10:48:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.7297297297297298) internal successors, (768), 445 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 768 transitions. [2021-11-09 10:48:47,881 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 768 transitions. Word has length 60 [2021-11-09 10:48:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:47,882 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 768 transitions. [2021-11-09 10:48:47,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 768 transitions. [2021-11-09 10:48:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:48:47,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:47,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:47,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:48:47,886 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:47,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1365479910, now seen corresponding path program 1 times [2021-11-09 10:48:47,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:47,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121658989] [2021-11-09 10:48:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:47,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:47,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:47,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121658989] [2021-11-09 10:48:47,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121658989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:47,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:47,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:47,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655990284] [2021-11-09 10:48:47,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:47,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:47,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:47,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:47,990 INFO L87 Difference]: Start difference. First operand 446 states and 768 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:48,038 INFO L93 Difference]: Finished difference Result 874 states and 1510 transitions. [2021-11-09 10:48:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 10:48:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:48,042 INFO L225 Difference]: With dead ends: 874 [2021-11-09 10:48:48,043 INFO L226 Difference]: Without dead ends: 451 [2021-11-09 10:48:48,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-09 10:48:48,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 446. [2021-11-09 10:48:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.722972972972973) internal successors, (765), 445 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 765 transitions. [2021-11-09 10:48:48,067 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 765 transitions. Word has length 61 [2021-11-09 10:48:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:48,067 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 765 transitions. [2021-11-09 10:48:48,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 765 transitions. [2021-11-09 10:48:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:48:48,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:48,070 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:48,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:48:48,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:48,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1485679349, now seen corresponding path program 1 times [2021-11-09 10:48:48,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:48,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762973562] [2021-11-09 10:48:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:48,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:48,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:48,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762973562] [2021-11-09 10:48:48,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762973562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:48,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:48,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:48:48,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674556442] [2021-11-09 10:48:48,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:48:48,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:48:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:48,171 INFO L87 Difference]: Start difference. First operand 446 states and 765 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:48,344 INFO L93 Difference]: Finished difference Result 1277 states and 2203 transitions. [2021-11-09 10:48:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:48:48,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 10:48:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:48,351 INFO L225 Difference]: With dead ends: 1277 [2021-11-09 10:48:48,352 INFO L226 Difference]: Without dead ends: 858 [2021-11-09 10:48:48,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:48:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-11-09 10:48:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 446. [2021-11-09 10:48:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.7207207207207207) internal successors, (764), 445 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 764 transitions. [2021-11-09 10:48:48,411 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 764 transitions. Word has length 63 [2021-11-09 10:48:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:48,413 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 764 transitions. [2021-11-09 10:48:48,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 764 transitions. [2021-11-09 10:48:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:48:48,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:48,416 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:48,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:48:48,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1005040360, now seen corresponding path program 1 times [2021-11-09 10:48:48,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:48,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647517356] [2021-11-09 10:48:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:48,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:48,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:48,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647517356] [2021-11-09 10:48:48,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647517356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:48,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:48,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:48:48,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880512793] [2021-11-09 10:48:48,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:48:48,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:48:48,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:48,566 INFO L87 Difference]: Start difference. First operand 446 states and 764 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2021-11-09 10:48:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:48,764 INFO L93 Difference]: Finished difference Result 1282 states and 2207 transitions. [2021-11-09 10:48:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:48:48,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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 [2021-11-09 10:48:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:48,770 INFO L225 Difference]: With dead ends: 1282 [2021-11-09 10:48:48,771 INFO L226 Difference]: Without dead ends: 863 [2021-11-09 10:48:48,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:48:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-11-09 10:48:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 446. [2021-11-09 10:48:48,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.7184684684684686) internal successors, (763), 445 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 763 transitions. [2021-11-09 10:48:48,806 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 763 transitions. Word has length 64 [2021-11-09 10:48:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:48,806 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 763 transitions. [2021-11-09 10:48:48,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2021-11-09 10:48:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 763 transitions. [2021-11-09 10:48:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 10:48:48,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:48,809 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:48,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:48:48,809 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1736442320, now seen corresponding path program 1 times [2021-11-09 10:48:48,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:48,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194450588] [2021-11-09 10:48:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:48,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:48,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:48,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194450588] [2021-11-09 10:48:48,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194450588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:48,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:48,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:48,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275469336] [2021-11-09 10:48:48,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:48,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:48,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:48,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:48,924 INFO L87 Difference]: Start difference. First operand 446 states and 763 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:48,966 INFO L93 Difference]: Finished difference Result 650 states and 1095 transitions. [2021-11-09 10:48:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:48,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 10:48:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:48,977 INFO L225 Difference]: With dead ends: 650 [2021-11-09 10:48:48,977 INFO L226 Difference]: Without dead ends: 449 [2021-11-09 10:48:48,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-09 10:48:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 448. [2021-11-09 10:48:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 446 states have (on average 1.7152466367713004) internal successors, (765), 447 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 765 transitions. [2021-11-09 10:48:49,011 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 765 transitions. Word has length 65 [2021-11-09 10:48:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:49,011 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 765 transitions. [2021-11-09 10:48:49,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 765 transitions. [2021-11-09 10:48:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:48:49,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:49,014 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:49,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:48:49,014 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:49,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2037678178, now seen corresponding path program 1 times [2021-11-09 10:48:49,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:49,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119609562] [2021-11-09 10:48:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:49,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:49,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:49,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119609562] [2021-11-09 10:48:49,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119609562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:49,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:49,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:49,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087717124] [2021-11-09 10:48:49,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:49,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:49,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:49,113 INFO L87 Difference]: Start difference. First operand 448 states and 765 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:49,186 INFO L93 Difference]: Finished difference Result 1230 states and 2119 transitions. [2021-11-09 10:48:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:49,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-09 10:48:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:49,194 INFO L225 Difference]: With dead ends: 1230 [2021-11-09 10:48:49,194 INFO L226 Difference]: Without dead ends: 813 [2021-11-09 10:48:49,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-11-09 10:48:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 612. [2021-11-09 10:48:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 610 states have (on average 1.7459016393442623) internal successors, (1065), 611 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1065 transitions. [2021-11-09 10:48:49,247 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1065 transitions. Word has length 73 [2021-11-09 10:48:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:49,249 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1065 transitions. [2021-11-09 10:48:49,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1065 transitions. [2021-11-09 10:48:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 10:48:49,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:49,256 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:49,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:48:49,256 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2082574525, now seen corresponding path program 1 times [2021-11-09 10:48:49,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:49,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420537552] [2021-11-09 10:48:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:49,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:49,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:49,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420537552] [2021-11-09 10:48:49,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420537552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:49,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:49,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:48:49,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758872845] [2021-11-09 10:48:49,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:48:49,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:49,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:48:49,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:49,390 INFO L87 Difference]: Start difference. First operand 612 states and 1065 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:49,699 INFO L93 Difference]: Finished difference Result 1766 states and 3101 transitions. [2021-11-09 10:48:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:48:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-09 10:48:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:49,708 INFO L225 Difference]: With dead ends: 1766 [2021-11-09 10:48:49,708 INFO L226 Difference]: Without dead ends: 1185 [2021-11-09 10:48:49,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:48:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-09 10:48:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 612. [2021-11-09 10:48:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 610 states have (on average 1.7426229508196722) internal successors, (1063), 611 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1063 transitions. [2021-11-09 10:48:49,784 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1063 transitions. Word has length 74 [2021-11-09 10:48:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:49,785 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1063 transitions. [2021-11-09 10:48:49,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1063 transitions. [2021-11-09 10:48:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 10:48:49,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:49,788 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:49,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:48:49,789 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1513510444, now seen corresponding path program 1 times [2021-11-09 10:48:49,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:49,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512502814] [2021-11-09 10:48:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:49,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:49,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:49,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512502814] [2021-11-09 10:48:49,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512502814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:49,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:49,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:49,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782060837] [2021-11-09 10:48:49,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:49,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:49,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:49,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:49,868 INFO L87 Difference]: Start difference. First operand 612 states and 1063 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:49,968 INFO L93 Difference]: Finished difference Result 1764 states and 3093 transitions. [2021-11-09 10:48:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-09 10:48:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:49,980 INFO L225 Difference]: With dead ends: 1764 [2021-11-09 10:48:49,980 INFO L226 Difference]: Without dead ends: 1183 [2021-11-09 10:48:49,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-11-09 10:48:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 982. [2021-11-09 10:48:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 980 states have (on average 1.7755102040816326) internal successors, (1740), 981 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1740 transitions. [2021-11-09 10:48:50,060 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1740 transitions. Word has length 75 [2021-11-09 10:48:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:50,060 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1740 transitions. [2021-11-09 10:48:50,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1740 transitions. [2021-11-09 10:48:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 10:48:50,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:50,064 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:50,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:48:50,064 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash 850334194, now seen corresponding path program 1 times [2021-11-09 10:48:50,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:50,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163166618] [2021-11-09 10:48:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:50,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:50,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:50,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163166618] [2021-11-09 10:48:50,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163166618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:50,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208954114] [2021-11-09 10:48:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:50,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:50,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:50,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:50,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:48:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:50,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:48:50,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:50,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208954114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:50,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:50,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 10:48:50,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876212351] [2021-11-09 10:48:50,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:48:50,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:50,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:48:50,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:50,828 INFO L87 Difference]: Start difference. First operand 982 states and 1740 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:50,950 INFO L93 Difference]: Finished difference Result 1607 states and 2799 transitions. [2021-11-09 10:48:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:50,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 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 75 [2021-11-09 10:48:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:50,960 INFO L225 Difference]: With dead ends: 1607 [2021-11-09 10:48:50,961 INFO L226 Difference]: Without dead ends: 1406 [2021-11-09 10:48:50,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-11-09 10:48:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1202. [2021-11-09 10:48:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1200 states have (on average 1.7808333333333333) internal successors, (2137), 1201 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 2137 transitions. [2021-11-09 10:48:51,073 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 2137 transitions. Word has length 75 [2021-11-09 10:48:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:51,073 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 2137 transitions. [2021-11-09 10:48:51,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 2137 transitions. [2021-11-09 10:48:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 10:48:51,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:51,077 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:51,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:51,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5cb612-ffc7-487d-8cbc-36a34942b68b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:48:51,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:51,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:51,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1892418289, now seen corresponding path program 1 times [2021-11-09 10:48:51,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:51,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729764039] [2021-11-09 10:48:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:51,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:51,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:51,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729764039] [2021-11-09 10:48:51,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729764039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:51,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:51,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:51,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773459003] [2021-11-09 10:48:51,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:51,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:51,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:51,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:51,385 INFO L87 Difference]: Start difference. First operand 1202 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:51,570 INFO L93 Difference]: Finished difference Result 3236 states and 5778 transitions. [2021-11-09 10:48:51,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:51,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-09 10:48:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:51,586 INFO L225 Difference]: With dead ends: 3236 [2021-11-09 10:48:51,586 INFO L226 Difference]: Without dead ends: 2135 [2021-11-09 10:48:51,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-11-09 10:48:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1934. [2021-11-09 10:48:51,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1932 states have (on average 1.7960662525879918) internal successors, (3470), 1933 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3470 transitions. [2021-11-09 10:48:51,741 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3470 transitions. Word has length 79 [2021-11-09 10:48:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:51,742 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 3470 transitions. [2021-11-09 10:48:51,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3470 transitions. [2021-11-09 10:48:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:48:51,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:51,748 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:51,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:48:51,748 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:51,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1745402511, now seen corresponding path program 1 times [2021-11-09 10:48:51,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:51,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416941350] [2021-11-09 10:48:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:51,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:51,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:51,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416941350] [2021-11-09 10:48:51,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416941350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:51,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:51,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:51,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556850876] [2021-11-09 10:48:51,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:51,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:51,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:51,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:51,823 INFO L87 Difference]: Start difference. First operand 1934 states and 3470 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:52,091 INFO L93 Difference]: Finished difference Result 5168 states and 9296 transitions. [2021-11-09 10:48:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-09 10:48:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:52,114 INFO L225 Difference]: With dead ends: 5168 [2021-11-09 10:48:52,114 INFO L226 Difference]: Without dead ends: 3369 [2021-11-09 10:48:52,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-11-09 10:48:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3168. [2021-11-09 10:48:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3168 states, 3166 states have (on average 1.8038534428300694) internal successors, (5711), 3167 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3168 states to 3168 states and 5711 transitions. [2021-11-09 10:48:52,366 INFO L78 Accepts]: Start accepts. Automaton has 3168 states and 5711 transitions. Word has length 80 [2021-11-09 10:48:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:52,367 INFO L470 AbstractCegarLoop]: Abstraction has 3168 states and 5711 transitions. [2021-11-09 10:48:52,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3168 states and 5711 transitions. [2021-11-09 10:48:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 10:48:52,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:52,374 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:52,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:48:52,375 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:52,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash -781523584, now seen corresponding path program 1 times [2021-11-09 10:48:52,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:52,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014585846] [2021-11-09 10:48:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:52,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:52,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:52,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014585846] [2021-11-09 10:48:52,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014585846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:52,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:52,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:52,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870912558] [2021-11-09 10:48:52,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:52,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:52,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:52,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:52,476 INFO L87 Difference]: Start difference. First operand 3168 states and 5711 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:52,858 INFO L93 Difference]: Finished difference Result 8586 states and 15502 transitions. [2021-11-09 10:48:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-09 10:48:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:52,897 INFO L225 Difference]: With dead ends: 8586 [2021-11-09 10:48:52,898 INFO L226 Difference]: Without dead ends: 5587 [2021-11-09 10:48:52,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5587 states. [2021-11-09 10:48:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5587 to 5386. [2021-11-09 10:48:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5386 states, 5384 states have (on average 1.8068350668647846) internal successors, (9728), 5385 states have internal predecessors, (9728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 9728 transitions. [2021-11-09 10:48:53,307 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 9728 transitions. Word has length 81 [2021-11-09 10:48:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:53,307 INFO L470 AbstractCegarLoop]: Abstraction has 5386 states and 9728 transitions. [2021-11-09 10:48:53,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 9728 transitions. [2021-11-09 10:48:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:48:53,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:53,319 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:53,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:48:53,319 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:53,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:53,320 INFO L85 PathProgramCache]: Analyzing trace with hash 676936160, now seen corresponding path program 1 times [2021-11-09 10:48:53,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:53,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295306659] [2021-11-09 10:48:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:53,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:53,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:53,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295306659] [2021-11-09 10:48:53,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295306659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:53,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:53,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:53,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984893348] [2021-11-09 10:48:53,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:53,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:53,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:53,387 INFO L87 Difference]: Start difference. First operand 5386 states and 9728 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:53,989 INFO L93 Difference]: Finished difference Result 15566 states and 28164 transitions. [2021-11-09 10:48:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-09 10:48:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:54,048 INFO L225 Difference]: With dead ends: 15566 [2021-11-09 10:48:54,048 INFO L226 Difference]: Without dead ends: 10357 [2021-11-09 10:48:54,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10357 states. [2021-11-09 10:48:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10357 to 10156. [2021-11-09 10:48:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10156 states, 10154 states have (on average 1.8090407721095134) internal successors, (18369), 10155 states have internal predecessors, (18369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10156 states to 10156 states and 18369 transitions. [2021-11-09 10:48:54,789 INFO L78 Accepts]: Start accepts. Automaton has 10156 states and 18369 transitions. Word has length 82 [2021-11-09 10:48:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:54,789 INFO L470 AbstractCegarLoop]: Abstraction has 10156 states and 18369 transitions. [2021-11-09 10:48:54,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 10156 states and 18369 transitions. [2021-11-09 10:48:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 10:48:54,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:54,802 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:54,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 10:48:54,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:54,803 INFO L85 PathProgramCache]: Analyzing trace with hash 664331823, now seen corresponding path program 1 times [2021-11-09 10:48:54,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:54,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132272466] [2021-11-09 10:48:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:54,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:54,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:54,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132272466] [2021-11-09 10:48:54,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132272466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:54,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:54,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:54,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525549480] [2021-11-09 10:48:54,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:54,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:54,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:54,881 INFO L87 Difference]: Start difference. First operand 10156 states and 18369 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:55,952 INFO L93 Difference]: Finished difference Result 29706 states and 53786 transitions. [2021-11-09 10:48:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-09 10:48:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:56,017 INFO L225 Difference]: With dead ends: 29706 [2021-11-09 10:48:56,017 INFO L226 Difference]: Without dead ends: 19735 [2021-11-09 10:48:56,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:56,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19735 states. [2021-11-09 10:48:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19735 to 19534. [2021-11-09 10:48:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19534 states, 19532 states have (on average 1.8088265410608233) internal successors, (35330), 19533 states have internal predecessors, (35330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19534 states to 19534 states and 35330 transitions. [2021-11-09 10:48:57,642 INFO L78 Accepts]: Start accepts. Automaton has 19534 states and 35330 transitions. Word has length 83 [2021-11-09 10:48:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:57,642 INFO L470 AbstractCegarLoop]: Abstraction has 19534 states and 35330 transitions. [2021-11-09 10:48:57,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 19534 states and 35330 transitions. [2021-11-09 10:48:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 10:48:57,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:57,675 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:57,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 10:48:57,675 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1853175569, now seen corresponding path program 1 times [2021-11-09 10:48:57,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:57,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064723396] [2021-11-09 10:48:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:57,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:57,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:57,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064723396] [2021-11-09 10:48:57,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064723396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:57,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:57,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:57,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638605430] [2021-11-09 10:48:57,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:57,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:57,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:57,744 INFO L87 Difference]: Start difference. First operand 19534 states and 35330 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) [2021-11-09 10:48:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:59,702 INFO L93 Difference]: Finished difference Result 58026 states and 104983 transitions. [2021-11-09 10:48:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:59,703 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 [2021-11-09 10:48:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:59,862 INFO L225 Difference]: With dead ends: 58026 [2021-11-09 10:48:59,863 INFO L226 Difference]: Without dead ends: 38681 [2021-11-09 10:48:59,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38681 states. [2021-11-09 10:49:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38681 to 38480. [2021-11-09 10:49:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38480 states, 38478 states have (on average 1.8064088570092) internal successors, (69507), 38479 states have internal predecessors, (69507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38480 states to 38480 states and 69507 transitions. [2021-11-09 10:49:02,272 INFO L78 Accepts]: Start accepts. Automaton has 38480 states and 69507 transitions. Word has length 84 [2021-11-09 10:49:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:02,272 INFO L470 AbstractCegarLoop]: Abstraction has 38480 states and 69507 transitions. [2021-11-09 10:49:02,272 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) [2021-11-09 10:49:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 38480 states and 69507 transitions. [2021-11-09 10:49:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 10:49:02,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:02,299 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:02,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 10:49:02,300 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1607234326, now seen corresponding path program 1 times [2021-11-09 10:49:02,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:02,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303603773] [2021-11-09 10:49:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:02,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:49:02,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:02,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303603773] [2021-11-09 10:49:02,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303603773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:02,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:02,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:49:02,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670391874] [2021-11-09 10:49:02,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:49:02,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:49:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:49:02,599 INFO L87 Difference]: Start difference. First operand 38480 states and 69507 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:05,861 INFO L93 Difference]: Finished difference Result 113135 states and 204320 transitions. [2021-11-09 10:49:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:49:05,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-09 10:49:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:06,214 INFO L225 Difference]: With dead ends: 113135 [2021-11-09 10:49:06,214 INFO L226 Difference]: Without dead ends: 74912 [2021-11-09 10:49:06,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:49:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74912 states. [2021-11-09 10:49:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74912 to 38480. [2021-11-09 10:49:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38480 states, 38478 states have (on average 1.7997037268049274) internal successors, (69249), 38479 states have internal predecessors, (69249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38480 states to 38480 states and 69249 transitions. [2021-11-09 10:49:09,081 INFO L78 Accepts]: Start accepts. Automaton has 38480 states and 69249 transitions. Word has length 85 [2021-11-09 10:49:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:09,082 INFO L470 AbstractCegarLoop]: Abstraction has 38480 states and 69249 transitions. [2021-11-09 10:49:09,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 38480 states and 69249 transitions. [2021-11-09 10:49:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 10:49:09,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:09,144 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:09,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 10:49:09,145 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:09,145 INFO L85 PathProgramCache]: Analyzing trace with hash -323888332, now seen corresponding path program 2 times [2021-11-09 10:49:09,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:09,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659751708] [2021-11-09 10:49:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:09,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:09,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:09,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659751708] [2021-11-09 10:49:09,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659751708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:09,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:09,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:49:09,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834563480] [2021-11-09 10:49:09,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:49:09,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:49:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:49:09,239 INFO L87 Difference]: Start difference. First operand 38480 states and 69249 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 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) [2021-11-09 10:49:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:10,765 INFO L93 Difference]: Finished difference Result 76898 states and 138385 transitions. [2021-11-09 10:49:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:49:10,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 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 [2021-11-09 10:49:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:10,873 INFO L225 Difference]: With dead ends: 76898 [2021-11-09 10:49:10,873 INFO L226 Difference]: Without dead ends: 38681 [2021-11-09 10:49:10,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:49:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38681 states. [2021-11-09 10:49:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38681 to 38480. [2021-11-09 10:49:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38480 states, 38478 states have (on average 1.796377150579552) internal successors, (69121), 38479 states have internal predecessors, (69121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38480 states to 38480 states and 69121 transitions. [2021-11-09 10:49:13,012 INFO L78 Accepts]: Start accepts. Automaton has 38480 states and 69121 transitions. Word has length 85 [2021-11-09 10:49:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:13,012 INFO L470 AbstractCegarLoop]: Abstraction has 38480 states and 69121 transitions. [2021-11-09 10:49:13,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 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) [2021-11-09 10:49:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 38480 states and 69121 transitions. [2021-11-09 10:49:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 10:49:13,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:13,052 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:13,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 10:49:13,053 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:13,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:13,053 INFO L85 PathProgramCache]: Analyzing trace with hash -199419487, now seen corresponding path program 1 times [2021-11-09 10:49:13,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:13,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129817356] [2021-11-09 10:49:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:13,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:13,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:13,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129817356] [2021-11-09 10:49:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129817356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:13,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:13,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:49:13,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695586252] [2021-11-09 10:49:13,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:49:13,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:49:13,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:13,116 INFO L87 Difference]: Start difference. First operand 38480 states and 69121 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) [2021-11-09 10:49:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:15,829 INFO L93 Difference]: Finished difference Result 107020 states and 191963 transitions. [2021-11-09 10:49:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:49:15,830 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 [2021-11-09 10:49:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:15,982 INFO L225 Difference]: With dead ends: 107020 [2021-11-09 10:49:15,983 INFO L226 Difference]: Without dead ends: 68763 [2021-11-09 10:49:16,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68763 states. [2021-11-09 10:49:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68763 to 68562. [2021-11-09 10:49:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68562 states, 68560 states have (on average 1.7885939323220537) internal successors, (122626), 68561 states have internal predecessors, (122626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68562 states to 68562 states and 122626 transitions. [2021-11-09 10:49:19,316 INFO L78 Accepts]: Start accepts. Automaton has 68562 states and 122626 transitions. Word has length 85 [2021-11-09 10:49:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:19,316 INFO L470 AbstractCegarLoop]: Abstraction has 68562 states and 122626 transitions. [2021-11-09 10:49:19,316 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) [2021-11-09 10:49:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 68562 states and 122626 transitions. [2021-11-09 10:49:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-09 10:49:19,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:19,344 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:19,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 10:49:19,345 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:19,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1449006726, now seen corresponding path program 1 times [2021-11-09 10:49:19,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:19,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897630484] [2021-11-09 10:49:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:19,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:49:19,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:19,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897630484] [2021-11-09 10:49:19,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897630484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:19,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:19,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 10:49:19,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655516338] [2021-11-09 10:49:19,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:49:19,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:49:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:49:19,467 INFO L87 Difference]: Start difference. First operand 68562 states and 122626 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:26,177 INFO L93 Difference]: Finished difference Result 138672 states and 247725 transitions. [2021-11-09 10:49:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:49:26,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-09 10:49:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:26,529 INFO L225 Difference]: With dead ends: 138672 [2021-11-09 10:49:26,531 INFO L226 Difference]: Without dead ends: 138491 [2021-11-09 10:49:26,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:49:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138491 states. [2021-11-09 10:49:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138491 to 136941. [2021-11-09 10:49:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136941 states, 136939 states have (on average 1.7888037739431426) internal successors, (244957), 136940 states have internal predecessors, (244957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136941 states to 136941 states and 244957 transitions. [2021-11-09 10:49:33,594 INFO L78 Accepts]: Start accepts. Automaton has 136941 states and 244957 transitions. Word has length 86 [2021-11-09 10:49:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:33,594 INFO L470 AbstractCegarLoop]: Abstraction has 136941 states and 244957 transitions. [2021-11-09 10:49:33,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 136941 states and 244957 transitions. [2021-11-09 10:49:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 10:49:33,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:33,623 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:33,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 10:49:33,624 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:33,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1185636901, now seen corresponding path program 1 times [2021-11-09 10:49:33,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:33,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398104429] [2021-11-09 10:49:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:33,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:49:33,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:33,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398104429] [2021-11-09 10:49:33,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398104429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:33,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:33,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:49:33,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120500453] [2021-11-09 10:49:33,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:49:33,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:49:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:49:33,725 INFO L87 Difference]: Start difference. First operand 136941 states and 244957 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)