./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product16.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_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/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_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/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_fb7c90df-ead8-457e-a3b5-4abff769a905/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 5ce5fd5bda0c8594f52541a2ff1031f1544bc9165bf7645718c7801e066263fc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:19:03,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:19:03,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:19:03,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:19:03,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:19:03,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:19:03,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:19:03,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:19:03,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:19:03,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:19:03,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:19:03,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:19:03,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:19:03,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:19:03,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:19:03,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:19:03,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:19:03,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:19:03,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:19:03,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:19:03,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:19:03,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:19:03,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:19:03,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:19:03,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:19:03,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:19:03,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:19:03,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:19:03,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:19:03,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:19:03,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:19:03,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:19:03,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:19:03,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:19:03,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:19:03,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:19:03,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:19:03,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:19:03,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:19:03,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:19:03,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:19:03,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:19:03,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:19:03,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:19:03,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:19:03,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:19:03,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:19:03,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:19:03,394 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:19:03,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:19:03,394 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:19:03,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:19:03,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:19:03,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:19:03,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:19:03,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:19:03,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:19:03,395 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:19:03,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:19:03,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:19:03,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:19:03,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:19:03,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:19:03,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:19:03,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:19:03,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:19:03,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:19:03,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:19:03,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:19:03,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:19:03,398 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:19:03,398 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:19:03,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:19:03,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:19:03,399 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_fb7c90df-ead8-457e-a3b5-4abff769a905/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ce5fd5bda0c8594f52541a2ff1031f1544bc9165bf7645718c7801e066263fc [2021-11-09 09:19:03,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:19:03,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:19:03,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:19:03,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:19:03,672 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:19:03,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/product-lines/email_spec0_product16.cil.c [2021-11-09 09:19:03,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/data/32f861573/3704b6632354429c934c9800de7b3bf3/FLAGafba38983 [2021-11-09 09:19:04,350 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:19:04,354 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/sv-benchmarks/c/product-lines/email_spec0_product16.cil.c [2021-11-09 09:19:04,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/data/32f861573/3704b6632354429c934c9800de7b3bf3/FLAGafba38983 [2021-11-09 09:19:04,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/data/32f861573/3704b6632354429c934c9800de7b3bf3 [2021-11-09 09:19:04,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:19:04,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:19:04,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:19:04,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:19:04,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:19:04,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:19:04" (1/1) ... [2021-11-09 09:19:04,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e8a19c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:04, skipping insertion in model container [2021-11-09 09:19:04,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:19:04" (1/1) ... [2021-11-09 09:19:04,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:19:04,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:19:05,074 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_fb7c90df-ead8-457e-a3b5-4abff769a905/sv-benchmarks/c/product-lines/email_spec0_product16.cil.c[7449,7462] [2021-11-09 09:19:05,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:19:05,378 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:19:05,430 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_fb7c90df-ead8-457e-a3b5-4abff769a905/sv-benchmarks/c/product-lines/email_spec0_product16.cil.c[7449,7462] [2021-11-09 09:19:05,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:19:05,545 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:19:05,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05 WrapperNode [2021-11-09 09:19:05,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:19:05,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:19:05,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:19:05,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:19:05,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:19:05,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:19:05,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:19:05,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:19:05,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:19:05,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:19:05,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:19:05,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:19:05,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:05,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:19:05,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:05,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:19:05,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:19:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-09 09:19:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:19:05,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:19:05,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:19:05,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:19:07,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:19:07,962 INFO L299 CfgBuilder]: Removed 295 assume(true) statements. [2021-11-09 09:19:07,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:19:07 BoogieIcfgContainer [2021-11-09 09:19:07,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:19:07,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:19:07,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:19:07,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:19:07,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:19:04" (1/3) ... [2021-11-09 09:19:07,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd41c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:19:07, skipping insertion in model container [2021-11-09 09:19:07,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:05" (2/3) ... [2021-11-09 09:19:07,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd41c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:19:07, skipping insertion in model container [2021-11-09 09:19:07,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:19:07" (3/3) ... [2021-11-09 09:19:07,975 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product16.cil.c [2021-11-09 09:19:07,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:19:07,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 09:19:08,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:19:08,048 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 09:19:08,049 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 09:19:08,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 444 states have (on average 1.7432432432432432) internal successors, (774), 446 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 09:19:08,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:08,109 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] [2021-11-09 09:19:08,109 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2111077188, now seen corresponding path program 1 times [2021-11-09 09:19:08,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:08,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910996570] [2021-11-09 09:19:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:08,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:08,579 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 09:19:08,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:08,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910996570] [2021-11-09 09:19:08,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910996570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:08,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:08,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:08,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006669534] [2021-11-09 09:19:08,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:08,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:08,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:08,618 INFO L87 Difference]: Start difference. First operand has 447 states, 444 states have (on average 1.7432432432432432) internal successors, (774), 446 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 09:19:08,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:08,805 INFO L93 Difference]: Finished difference Result 1306 states and 2264 transitions. [2021-11-09 09:19:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:08,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-09 09:19:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:08,836 INFO L225 Difference]: With dead ends: 1306 [2021-11-09 09:19:08,836 INFO L226 Difference]: Without dead ends: 818 [2021-11-09 09:19:08,861 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 09:19:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-09 09:19:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 418. [2021-11-09 09:19:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 416 states have (on average 1.7355769230769231) internal successors, (722), 417 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 09:19:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 722 transitions. [2021-11-09 09:19:08,963 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 722 transitions. Word has length 54 [2021-11-09 09:19:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:08,965 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 722 transitions. [2021-11-09 09:19:08,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 09:19:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 722 transitions. [2021-11-09 09:19:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 09:19:08,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:08,976 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] [2021-11-09 09:19:08,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:19:08,977 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:08,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:08,980 INFO L85 PathProgramCache]: Analyzing trace with hash -41146153, now seen corresponding path program 1 times [2021-11-09 09:19:08,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:08,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536097511] [2021-11-09 09:19:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:08,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:09,129 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 09:19:09,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:09,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536097511] [2021-11-09 09:19:09,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536097511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:09,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:09,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:19:09,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558152793] [2021-11-09 09:19:09,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:19:09,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:19:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:09,134 INFO L87 Difference]: Start difference. First operand 418 states and 722 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:09,372 INFO L93 Difference]: Finished difference Result 1203 states and 2082 transitions. [2021-11-09 09:19:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:19:09,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-09 09:19:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:09,379 INFO L225 Difference]: With dead ends: 1203 [2021-11-09 09:19:09,380 INFO L226 Difference]: Without dead ends: 804 [2021-11-09 09:19:09,381 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 09:19:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-11-09 09:19:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 418. [2021-11-09 09:19:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 416 states have (on average 1.7331730769230769) internal successors, (721), 417 states have internal predecessors, (721), 0 states have call successors, (0), 0 states 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 09:19:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 721 transitions. [2021-11-09 09:19:09,413 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 721 transitions. Word has length 56 [2021-11-09 09:19:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:09,414 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 721 transitions. [2021-11-09 09:19:09,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 721 transitions. [2021-11-09 09:19:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:19:09,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:09,418 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] [2021-11-09 09:19:09,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:19:09,420 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1672431324, now seen corresponding path program 1 times [2021-11-09 09:19:09,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:09,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104477069] [2021-11-09 09:19:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:09,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:09,553 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 09:19:09,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:09,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104477069] [2021-11-09 09:19:09,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104477069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:09,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:09,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:09,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467430441] [2021-11-09 09:19:09,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:09,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:09,557 INFO L87 Difference]: Start difference. First operand 418 states and 721 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:09,595 INFO L93 Difference]: Finished difference Result 818 states and 1416 transitions. [2021-11-09 09:19:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:09,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 09:19:09,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:09,599 INFO L225 Difference]: With dead ends: 818 [2021-11-09 09:19:09,599 INFO L226 Difference]: Without dead ends: 423 [2021-11-09 09:19:09,601 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 09:19:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-09 09:19:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 418. [2021-11-09 09:19:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 416 states have (on average 1.7259615384615385) internal successors, (718), 417 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 09:19:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 718 transitions. [2021-11-09 09:19:09,619 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 718 transitions. Word has length 57 [2021-11-09 09:19:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:09,620 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 718 transitions. [2021-11-09 09:19:09,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 718 transitions. [2021-11-09 09:19:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 09:19:09,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:09,622 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] [2021-11-09 09:19:09,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:19:09,622 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1073781631, now seen corresponding path program 1 times [2021-11-09 09:19:09,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:09,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979456429] [2021-11-09 09:19:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:09,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:09,749 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 09:19:09,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:09,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979456429] [2021-11-09 09:19:09,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979456429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:09,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:09,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:19:09,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115753188] [2021-11-09 09:19:09,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:19:09,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:19:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:09,756 INFO L87 Difference]: Start difference. First operand 418 states and 718 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:09,904 INFO L93 Difference]: Finished difference Result 1193 states and 2062 transitions. [2021-11-09 09:19:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:19:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-09 09:19:09,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:09,911 INFO L225 Difference]: With dead ends: 1193 [2021-11-09 09:19:09,911 INFO L226 Difference]: Without dead ends: 802 [2021-11-09 09:19:09,913 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 09:19:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-11-09 09:19:09,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 418. [2021-11-09 09:19:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 416 states have (on average 1.7235576923076923) internal successors, (717), 417 states have internal predecessors, (717), 0 states have call successors, (0), 0 states 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 09:19:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 717 transitions. [2021-11-09 09:19:09,969 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 717 transitions. Word has length 59 [2021-11-09 09:19:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:09,970 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 717 transitions. [2021-11-09 09:19:09,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 717 transitions. [2021-11-09 09:19:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:19:09,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:09,975 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 09:19:09,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:19:09,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:09,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:09,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1814021922, now seen corresponding path program 1 times [2021-11-09 09:19:09,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:09,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211056312] [2021-11-09 09:19:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:09,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:10,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:10,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211056312] [2021-11-09 09:19:10,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211056312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:10,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:10,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:19:10,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837404637] [2021-11-09 09:19:10,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:19:10,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:19:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:10,104 INFO L87 Difference]: Start difference. First operand 418 states and 717 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 09:19:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:10,269 INFO L93 Difference]: Finished difference Result 1198 states and 2066 transitions. [2021-11-09 09:19:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:19:10,270 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 09:19:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:10,276 INFO L225 Difference]: With dead ends: 1198 [2021-11-09 09:19:10,276 INFO L226 Difference]: Without dead ends: 807 [2021-11-09 09:19:10,278 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 09:19:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-11-09 09:19:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 418. [2021-11-09 09:19:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 416 states have (on average 1.7211538461538463) internal successors, (716), 417 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 09:19:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 716 transitions. [2021-11-09 09:19:10,306 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 716 transitions. Word has length 60 [2021-11-09 09:19:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:10,306 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 716 transitions. [2021-11-09 09:19:10,306 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 09:19:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 716 transitions. [2021-11-09 09:19:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 09:19:10,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:10,308 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 09:19:10,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:19:10,309 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:10,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2004599866, now seen corresponding path program 1 times [2021-11-09 09:19:10,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:10,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435635348] [2021-11-09 09:19:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:10,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:10,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:10,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435635348] [2021-11-09 09:19:10,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435635348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:10,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:10,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:10,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133274345] [2021-11-09 09:19:10,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:10,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:10,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:10,401 INFO L87 Difference]: Start difference. First operand 418 states and 716 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 09:19:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:10,431 INFO L93 Difference]: Finished difference Result 598 states and 1008 transitions. [2021-11-09 09:19:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:10,433 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 09:19:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:10,442 INFO L225 Difference]: With dead ends: 598 [2021-11-09 09:19:10,442 INFO L226 Difference]: Without dead ends: 421 [2021-11-09 09:19:10,443 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 09:19:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-09 09:19:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 420. [2021-11-09 09:19:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 418 states have (on average 1.7177033492822966) internal successors, (718), 419 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 09:19:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 718 transitions. [2021-11-09 09:19:10,482 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 718 transitions. Word has length 61 [2021-11-09 09:19:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:10,482 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 718 transitions. [2021-11-09 09:19:10,482 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 09:19:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 718 transitions. [2021-11-09 09:19:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:19:10,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:10,485 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] [2021-11-09 09:19:10,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:19:10,485 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:10,486 INFO L85 PathProgramCache]: Analyzing trace with hash 165773496, now seen corresponding path program 1 times [2021-11-09 09:19:10,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:10,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364817846] [2021-11-09 09:19:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:10,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:10,587 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 09:19:10,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:10,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364817846] [2021-11-09 09:19:10,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364817846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:10,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:10,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:10,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666211744] [2021-11-09 09:19:10,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:10,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:10,591 INFO L87 Difference]: Start difference. First operand 420 states and 718 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:10,649 INFO L93 Difference]: Finished difference Result 1146 states and 1978 transitions. [2021-11-09 09:19:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:10,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 09:19:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:10,655 INFO L225 Difference]: With dead ends: 1146 [2021-11-09 09:19:10,656 INFO L226 Difference]: Without dead ends: 757 [2021-11-09 09:19:10,657 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 09:19:10,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-11-09 09:19:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 580. [2021-11-09 09:19:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 578 states have (on average 1.7491349480968859) internal successors, (1011), 579 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states 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 09:19:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1011 transitions. [2021-11-09 09:19:10,697 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1011 transitions. Word has length 67 [2021-11-09 09:19:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:10,699 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1011 transitions. [2021-11-09 09:19:10,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1011 transitions. [2021-11-09 09:19:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 09:19:10,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:10,702 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] [2021-11-09 09:19:10,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:19:10,702 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1457089257, now seen corresponding path program 1 times [2021-11-09 09:19:10,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:10,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120832886] [2021-11-09 09:19:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:10,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:10,813 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 09:19:10,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:10,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120832886] [2021-11-09 09:19:10,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120832886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:10,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499170918] [2021-11-09 09:19:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:10,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:10,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:10,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:10,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:19:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:11,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:19:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:11,394 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 09:19:11,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499170918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:11,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:11,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 09:19:11,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026309277] [2021-11-09 09:19:11,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:19:11,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:11,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:19:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:11,399 INFO L87 Difference]: Start difference. First operand 580 states and 1011 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:11,489 INFO L93 Difference]: Finished difference Result 1150 states and 1981 transitions. [2021-11-09 09:19:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:19:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-09 09:19:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:11,497 INFO L225 Difference]: With dead ends: 1150 [2021-11-09 09:19:11,497 INFO L226 Difference]: Without dead ends: 973 [2021-11-09 09:19:11,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 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 09:19:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-09 09:19:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 794. [2021-11-09 09:19:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 792 states have (on average 1.768939393939394) internal successors, (1401), 793 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states 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 09:19:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1401 transitions. [2021-11-09 09:19:11,585 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1401 transitions. Word has length 68 [2021-11-09 09:19:11,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:11,586 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1401 transitions. [2021-11-09 09:19:11,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1401 transitions. [2021-11-09 09:19:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 09:19:11,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:11,592 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] [2021-11-09 09:19:11,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:11,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c90df-ead8-457e-a3b5-4abff769a905/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 09:19:11,804 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2091517718, now seen corresponding path program 1 times [2021-11-09 09:19:11,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:11,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352227166] [2021-11-09 09:19:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:11,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:11,863 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 09:19:11,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:11,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352227166] [2021-11-09 09:19:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352227166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:11,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:11,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:11,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017810734] [2021-11-09 09:19:11,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:11,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:11,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:11,866 INFO L87 Difference]: Start difference. First operand 794 states and 1401 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:11,952 INFO L93 Difference]: Finished difference Result 2048 states and 3627 transitions. [2021-11-09 09:19:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:11,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-09 09:19:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:11,962 INFO L225 Difference]: With dead ends: 2048 [2021-11-09 09:19:11,962 INFO L226 Difference]: Without dead ends: 1343 [2021-11-09 09:19:11,964 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 09:19:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-11-09 09:19:12,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1166. [2021-11-09 09:19:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1164 states have (on average 1.7860824742268042) internal successors, (2079), 1165 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states 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 09:19:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2079 transitions. [2021-11-09 09:19:12,063 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2079 transitions. Word has length 74 [2021-11-09 09:19:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:12,063 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2079 transitions. [2021-11-09 09:19:12,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2079 transitions. [2021-11-09 09:19:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 09:19:12,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:12,067 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-09 09:19:12,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:19:12,067 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:12,068 INFO L85 PathProgramCache]: Analyzing trace with hash -971669094, now seen corresponding path program 2 times [2021-11-09 09:19:12,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:12,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093529601] [2021-11-09 09:19:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:12,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:12,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:12,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093529601] [2021-11-09 09:19:12,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093529601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:12,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:12,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:19:12,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140257885] [2021-11-09 09:19:12,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:19:12,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:12,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:19:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:12,171 INFO L87 Difference]: Start difference. First operand 1166 states and 2079 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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 09:19:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:12,291 INFO L93 Difference]: Finished difference Result 2262 states and 4015 transitions. [2021-11-09 09:19:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:19:12,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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 09:19:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:12,301 INFO L225 Difference]: With dead ends: 2262 [2021-11-09 09:19:12,302 INFO L226 Difference]: Without dead ends: 1343 [2021-11-09 09:19:12,306 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 09:19:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-11-09 09:19:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1166. [2021-11-09 09:19:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1164 states have (on average 1.784364261168385) internal successors, (2077), 1165 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states 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 09:19:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2077 transitions. [2021-11-09 09:19:12,390 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2077 transitions. Word has length 75 [2021-11-09 09:19:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:12,390 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2077 transitions. [2021-11-09 09:19:12,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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 09:19:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2077 transitions. [2021-11-09 09:19:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 09:19:12,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:12,394 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] [2021-11-09 09:19:12,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:19:12,394 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:12,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1362735737, now seen corresponding path program 1 times [2021-11-09 09:19:12,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:12,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239428270] [2021-11-09 09:19:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:12,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:12,495 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 09:19:12,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:12,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239428270] [2021-11-09 09:19:12,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239428270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:12,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:12,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:12,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656519684] [2021-11-09 09:19:12,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:12,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:12,498 INFO L87 Difference]: Start difference. First operand 1166 states and 2077 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 09:19:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:12,624 INFO L93 Difference]: Finished difference Result 3136 states and 5610 transitions. [2021-11-09 09:19:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:12,625 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 09:19:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:12,640 INFO L225 Difference]: With dead ends: 3136 [2021-11-09 09:19:12,640 INFO L226 Difference]: Without dead ends: 2067 [2021-11-09 09:19:12,643 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 09:19:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-11-09 09:19:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1890. [2021-11-09 09:19:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1888 states have (on average 1.798728813559322) internal successors, (3396), 1889 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states 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 09:19:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3396 transitions. [2021-11-09 09:19:12,773 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3396 transitions. Word has length 75 [2021-11-09 09:19:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:12,774 INFO L470 AbstractCegarLoop]: Abstraction has 1890 states and 3396 transitions. [2021-11-09 09:19:12,774 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 09:19:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3396 transitions. [2021-11-09 09:19:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 09:19:12,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:12,779 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] [2021-11-09 09:19:12,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:19:12,780 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:12,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:12,780 INFO L85 PathProgramCache]: Analyzing trace with hash -47600340, now seen corresponding path program 1 times [2021-11-09 09:19:12,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:12,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379570541] [2021-11-09 09:19:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:12,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:12,845 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 09:19:12,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:12,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379570541] [2021-11-09 09:19:12,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379570541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:12,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:12,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:12,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889833569] [2021-11-09 09:19:12,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:12,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:12,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:12,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:12,848 INFO L87 Difference]: Start difference. First operand 1890 states and 3396 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 09:19:13,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:13,062 INFO L93 Difference]: Finished difference Result 5044 states and 9086 transitions. [2021-11-09 09:19:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:13,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-09 09:19:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:13,084 INFO L225 Difference]: With dead ends: 5044 [2021-11-09 09:19:13,084 INFO L226 Difference]: Without dead ends: 3285 [2021-11-09 09:19:13,088 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 09:19:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2021-11-09 09:19:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 3108. [2021-11-09 09:19:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3106 states have (on average 1.805859626529298) internal successors, (5609), 3107 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states 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 09:19:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 5609 transitions. [2021-11-09 09:19:13,344 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 5609 transitions. Word has length 76 [2021-11-09 09:19:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:13,344 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 5609 transitions. [2021-11-09 09:19:13,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 09:19:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 5609 transitions. [2021-11-09 09:19:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:19:13,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:13,354 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] [2021-11-09 09:19:13,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:19:13,354 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:13,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1025498678, now seen corresponding path program 1 times [2021-11-09 09:19:13,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:13,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763254702] [2021-11-09 09:19:13,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:13,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:13,427 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 09:19:13,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:13,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763254702] [2021-11-09 09:19:13,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763254702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:13,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:13,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:13,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915719729] [2021-11-09 09:19:13,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:13,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:13,429 INFO L87 Difference]: Start difference. First operand 3108 states and 5609 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:13,761 INFO L93 Difference]: Finished difference Result 8414 states and 15208 transitions. [2021-11-09 09:19:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:13,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:19:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:13,795 INFO L225 Difference]: With dead ends: 8414 [2021-11-09 09:19:13,795 INFO L226 Difference]: Without dead ends: 5471 [2021-11-09 09:19:13,799 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 09:19:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-11-09 09:19:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5294. [2021-11-09 09:19:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5294 states, 5292 states have (on average 1.808390022675737) internal successors, (9570), 5293 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states 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 09:19:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 9570 transitions. [2021-11-09 09:19:14,165 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 9570 transitions. Word has length 77 [2021-11-09 09:19:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:14,165 INFO L470 AbstractCegarLoop]: Abstraction has 5294 states and 9570 transitions. [2021-11-09 09:19:14,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 9570 transitions. [2021-11-09 09:19:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 09:19:14,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:14,173 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] [2021-11-09 09:19:14,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:19:14,173 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:14,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash -6879762, now seen corresponding path program 1 times [2021-11-09 09:19:14,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:14,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819933389] [2021-11-09 09:19:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:14,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:14,244 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 09:19:14,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:14,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819933389] [2021-11-09 09:19:14,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819933389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:14,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:14,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:19:14,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101254683] [2021-11-09 09:19:14,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:19:14,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:14,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:19:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:14,247 INFO L87 Difference]: Start difference. First operand 5294 states and 9570 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 09:19:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:15,090 INFO L93 Difference]: Finished difference Result 15101 states and 27327 transitions. [2021-11-09 09:19:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:19:15,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 78 [2021-11-09 09:19:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:15,145 INFO L225 Difference]: With dead ends: 15101 [2021-11-09 09:19:15,145 INFO L226 Difference]: Without dead ends: 10054 [2021-11-09 09:19:15,154 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 09:19:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10054 states. [2021-11-09 09:19:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10054 to 5294. [2021-11-09 09:19:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5294 states, 5292 states have (on average 1.7989417989417988) internal successors, (9520), 5293 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states 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 09:19:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 9520 transitions. [2021-11-09 09:19:15,626 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 9520 transitions. Word has length 78 [2021-11-09 09:19:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:15,627 INFO L470 AbstractCegarLoop]: Abstraction has 5294 states and 9520 transitions. [2021-11-09 09:19:15,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 09:19:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 9520 transitions. [2021-11-09 09:19:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 09:19:15,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:15,638 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] [2021-11-09 09:19:15,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:19:15,638 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1641915037, now seen corresponding path program 1 times [2021-11-09 09:19:15,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:15,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154277347] [2021-11-09 09:19:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:15,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:15,740 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 09:19:15,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:15,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154277347] [2021-11-09 09:19:15,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154277347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:15,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:15,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:15,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871966090] [2021-11-09 09:19:15,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:15,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:15,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:15,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:15,745 INFO L87 Difference]: Start difference. First operand 5294 states and 9520 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 09:19:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:16,326 INFO L93 Difference]: Finished difference Result 15298 states and 27555 transitions. [2021-11-09 09:19:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-09 09:19:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:16,357 INFO L225 Difference]: With dead ends: 15298 [2021-11-09 09:19:16,357 INFO L226 Difference]: Without dead ends: 10177 [2021-11-09 09:19:16,367 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 09:19:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10177 states. [2021-11-09 09:19:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10177 to 10000. [2021-11-09 09:19:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10000 states, 9998 states have (on average 1.8004600920184037) internal successors, (18001), 9999 states have internal predecessors, (18001), 0 states have call successors, (0), 0 states 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 09:19:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 18001 transitions. [2021-11-09 09:19:17,023 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 18001 transitions. Word has length 78 [2021-11-09 09:19:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:17,023 INFO L470 AbstractCegarLoop]: Abstraction has 10000 states and 18001 transitions. [2021-11-09 09:19:17,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 09:19:17,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 18001 transitions. [2021-11-09 09:19:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:19:17,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:17,035 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] [2021-11-09 09:19:17,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:19:17,036 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:17,037 INFO L85 PathProgramCache]: Analyzing trace with hash 911348905, now seen corresponding path program 1 times [2021-11-09 09:19:17,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:17,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295705048] [2021-11-09 09:19:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:17,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:17,161 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 09:19:17,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:17,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295705048] [2021-11-09 09:19:17,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295705048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:17,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:17,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:19:17,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196239969] [2021-11-09 09:19:17,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:19:17,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:19:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:19:17,164 INFO L87 Difference]: Start difference. First operand 10000 states and 18001 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 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 09:19:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:19,266 INFO L93 Difference]: Finished difference Result 20870 states and 37377 transitions. [2021-11-09 09:19:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:19:19,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 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 79 [2021-11-09 09:19:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:19,327 INFO L225 Difference]: With dead ends: 20870 [2021-11-09 09:19:19,327 INFO L226 Difference]: Without dead ends: 20713 [2021-11-09 09:19:19,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:19:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20713 states. [2021-11-09 09:19:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20713 to 19825. [2021-11-09 09:19:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19823 states have (on average 1.8016445543056046) internal successors, (35714), 19824 states have internal predecessors, (35714), 0 states have call successors, (0), 0 states 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 09:19:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 35714 transitions. [2021-11-09 09:19:20,416 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 35714 transitions. Word has length 79 [2021-11-09 09:19:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:20,417 INFO L470 AbstractCegarLoop]: Abstraction has 19825 states and 35714 transitions. [2021-11-09 09:19:20,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 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 09:19:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 35714 transitions. [2021-11-09 09:19:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 09:19:20,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:20,439 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] [2021-11-09 09:19:20,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 09:19:20,439 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1598716969, now seen corresponding path program 1 times [2021-11-09 09:19:20,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:20,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086186669] [2021-11-09 09:19:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:20,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:20,541 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 09:19:20,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:20,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086186669] [2021-11-09 09:19:20,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086186669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:20,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:20,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:19:20,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891453434] [2021-11-09 09:19:20,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:19:20,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:19:20,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:19:20,545 INFO L87 Difference]: Start difference. First operand 19825 states and 35714 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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 09:19:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:21,679 INFO L93 Difference]: Finished difference Result 20176 states and 36282 transitions. [2021-11-09 09:19:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:19:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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 80 [2021-11-09 09:19:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:21,739 INFO L225 Difference]: With dead ends: 20176 [2021-11-09 09:19:21,739 INFO L226 Difference]: Without dead ends: 19865 [2021-11-09 09:19:21,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:19:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19865 states. [2021-11-09 09:19:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19865 to 19807. [2021-11-09 09:19:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19807 states, 19805 states have (on average 1.8012623074981065) internal successors, (35674), 19806 states have internal predecessors, (35674), 0 states have call successors, (0), 0 states 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 09:19:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19807 states to 19807 states and 35674 transitions. [2021-11-09 09:19:22,924 INFO L78 Accepts]: Start accepts. Automaton has 19807 states and 35674 transitions. Word has length 80 [2021-11-09 09:19:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:22,924 INFO L470 AbstractCegarLoop]: Abstraction has 19807 states and 35674 transitions. [2021-11-09 09:19:22,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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 09:19:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 19807 states and 35674 transitions. [2021-11-09 09:19:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 09:19:22,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:22,947 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] [2021-11-09 09:19:22,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 09:19:22,948 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:22,948 INFO L85 PathProgramCache]: Analyzing trace with hash -975815435, now seen corresponding path program 1 times [2021-11-09 09:19:22,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:22,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582045846] [2021-11-09 09:19:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:22,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:23,012 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 09:19:23,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:23,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582045846] [2021-11-09 09:19:23,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582045846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:23,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:23,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:23,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911177660] [2021-11-09 09:19:23,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:19:23,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:23,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:19:23,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:19:23,015 INFO L87 Difference]: Start difference. First operand 19807 states and 35674 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:24,187 INFO L93 Difference]: Finished difference Result 30493 states and 54756 transitions. [2021-11-09 09:19:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:19:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 09:19:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:24,255 INFO L225 Difference]: With dead ends: 30493 [2021-11-09 09:19:24,255 INFO L226 Difference]: Without dead ends: 30247 [2021-11-09 09:19:24,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30247 states. [2021-11-09 09:19:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30247 to 29664. [2021-11-09 09:19:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29664 states, 29662 states have (on average 1.8010923066549793) internal successors, (53424), 29663 states have internal predecessors, (53424), 0 states have call successors, (0), 0 states 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 09:19:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29664 states to 29664 states and 53424 transitions. [2021-11-09 09:19:25,953 INFO L78 Accepts]: Start accepts. Automaton has 29664 states and 53424 transitions. Word has length 80 [2021-11-09 09:19:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:25,953 INFO L470 AbstractCegarLoop]: Abstraction has 29664 states and 53424 transitions. [2021-11-09 09:19:25,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 29664 states and 53424 transitions. [2021-11-09 09:19:25,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 09:19:25,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:25,982 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] [2021-11-09 09:19:25,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 09:19:25,982 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash -913775821, now seen corresponding path program 1 times [2021-11-09 09:19:25,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:25,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034366289] [2021-11-09 09:19:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:25,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:26,113 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 09:19:26,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:26,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034366289] [2021-11-09 09:19:26,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034366289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:26,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:26,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 09:19:26,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885287238] [2021-11-09 09:19:26,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:19:26,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:19:26,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:19:26,117 INFO L87 Difference]: Start difference. First operand 29664 states and 53424 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 09:19:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:28,005 INFO L93 Difference]: Finished difference Result 31913 states and 56910 transitions. [2021-11-09 09:19:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:19:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 80 [2021-11-09 09:19:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:28,060 INFO L225 Difference]: With dead ends: 31913 [2021-11-09 09:19:28,060 INFO L226 Difference]: Without dead ends: 31545 [2021-11-09 09:19:28,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:19:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31545 states. [2021-11-09 09:19:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31545 to 29828. [2021-11-09 09:19:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29828 states, 29826 states have (on average 1.7993696774626164) internal successors, (53668), 29827 states have internal predecessors, (53668), 0 states have call successors, (0), 0 states 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 09:19:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29828 states to 29828 states and 53668 transitions. [2021-11-09 09:19:29,514 INFO L78 Accepts]: Start accepts. Automaton has 29828 states and 53668 transitions. Word has length 80 [2021-11-09 09:19:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:29,514 INFO L470 AbstractCegarLoop]: Abstraction has 29828 states and 53668 transitions. [2021-11-09 09:19:29,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 09:19:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand 29828 states and 53668 transitions. [2021-11-09 09:19:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:19:29,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:29,550 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] [2021-11-09 09:19:29,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:19:29,551 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1738541367, now seen corresponding path program 1 times [2021-11-09 09:19:29,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:29,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72598272] [2021-11-09 09:19:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:29,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:29,703 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 09:19:29,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:29,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72598272] [2021-11-09 09:19:29,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72598272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:29,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:29,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-09 09:19:29,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662722850] [2021-11-09 09:19:29,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:19:29,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:29,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:19:29,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:19:29,706 INFO L87 Difference]: Start difference. First operand 29828 states and 53668 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 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 09:19:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:32,148 INFO L93 Difference]: Finished difference Result 32553 states and 57867 transitions. [2021-11-09 09:19:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:19:32,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 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 81 [2021-11-09 09:19:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:32,212 INFO L225 Difference]: With dead ends: 32553 [2021-11-09 09:19:32,213 INFO L226 Difference]: Without dead ends: 32146 [2021-11-09 09:19:32,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=466, Invalid=1340, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:19:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32146 states. [2021-11-09 09:19:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32146 to 29966. [2021-11-09 09:19:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29966 states, 29964 states have (on average 1.7986917634494728) internal successors, (53896), 29965 states have internal predecessors, (53896), 0 states have call successors, (0), 0 states 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 09:19:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29966 states to 29966 states and 53896 transitions. [2021-11-09 09:19:33,590 INFO L78 Accepts]: Start accepts. Automaton has 29966 states and 53896 transitions. Word has length 81 [2021-11-09 09:19:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:33,590 INFO L470 AbstractCegarLoop]: Abstraction has 29966 states and 53896 transitions. [2021-11-09 09:19:33,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 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 09:19:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 29966 states and 53896 transitions. [2021-11-09 09:19:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:19:33,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:33,614 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] [2021-11-09 09:19:33,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:19:33,614 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:33,615 INFO L85 PathProgramCache]: Analyzing trace with hash 641893999, now seen corresponding path program 1 times [2021-11-09 09:19:33,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:33,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695517122] [2021-11-09 09:19:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:33,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:33,708 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 09:19:33,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:33,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695517122] [2021-11-09 09:19:33,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695517122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:33,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:33,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:19:33,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971611166] [2021-11-09 09:19:33,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:19:33,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:33,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:19:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:19:33,711 INFO L87 Difference]: Start difference. First operand 29966 states and 53896 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 09:19:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:35,152 INFO L93 Difference]: Finished difference Result 30886 states and 55319 transitions. [2021-11-09 09:19:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:19:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 81 [2021-11-09 09:19:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:35,198 INFO L225 Difference]: With dead ends: 30886 [2021-11-09 09:19:35,198 INFO L226 Difference]: Without dead ends: 30086 [2021-11-09 09:19:35,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:19:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30086 states. [2021-11-09 09:19:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30086 to 29825. [2021-11-09 09:19:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29825 states, 29823 states have (on average 1.7988800590148544) internal successors, (53648), 29824 states have internal predecessors, (53648), 0 states have call successors, (0), 0 states 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 09:19:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29825 states to 29825 states and 53648 transitions. [2021-11-09 09:19:36,505 INFO L78 Accepts]: Start accepts. Automaton has 29825 states and 53648 transitions. Word has length 81 [2021-11-09 09:19:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:36,505 INFO L470 AbstractCegarLoop]: Abstraction has 29825 states and 53648 transitions. [2021-11-09 09:19:36,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 09:19:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 29825 states and 53648 transitions. [2021-11-09 09:19:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 09:19:36,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:36,522 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] [2021-11-09 09:19:36,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:19:36,523 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash -263772681, now seen corresponding path program 1 times [2021-11-09 09:19:36,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:36,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782525609] [2021-11-09 09:19:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:36,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:36,607 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 09:19:36,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:36,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782525609] [2021-11-09 09:19:36,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782525609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:36,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:36,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:19:36,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135596939] [2021-11-09 09:19:36,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:19:36,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:19:36,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:36,609 INFO L87 Difference]: Start difference. First operand 29825 states and 53648 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 09:19:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:39,132 INFO L93 Difference]: Finished difference Result 60114 states and 107939 transitions. [2021-11-09 09:19:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:19:39,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 09:19:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:39,238 INFO L225 Difference]: With dead ends: 60114 [2021-11-09 09:19:39,238 INFO L226 Difference]: Without dead ends: 59690 [2021-11-09 09:19:39,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:19:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59690 states. [2021-11-09 09:19:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59690 to 59229. [2021-11-09 09:19:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59229 states, 59227 states have (on average 1.7992638492579398) internal successors, (106565), 59228 states have internal predecessors, (106565), 0 states have call successors, (0), 0 states 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 09:19:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59229 states to 59229 states and 106565 transitions. [2021-11-09 09:19:41,948 INFO L78 Accepts]: Start accepts. Automaton has 59229 states and 106565 transitions. Word has length 82 [2021-11-09 09:19:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:41,948 INFO L470 AbstractCegarLoop]: Abstraction has 59229 states and 106565 transitions. [2021-11-09 09:19:41,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 09:19:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 59229 states and 106565 transitions. [2021-11-09 09:19:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 09:19:41,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:41,977 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] [2021-11-09 09:19:41,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 09:19:41,978 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2109561422, now seen corresponding path program 1 times [2021-11-09 09:19:41,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:41,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069539292] [2021-11-09 09:19:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:41,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:42,108 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 09:19:42,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:42,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069539292] [2021-11-09 09:19:42,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069539292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:42,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:42,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 09:19:42,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115790723] [2021-11-09 09:19:42,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:19:42,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:19:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:19:42,111 INFO L87 Difference]: Start difference. First operand 59229 states and 106565 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:45,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:45,144 INFO L93 Difference]: Finished difference Result 61546 states and 110175 transitions. [2021-11-09 09:19:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:19:45,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-09 09:19:45,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:45,269 INFO L225 Difference]: With dead ends: 61546 [2021-11-09 09:19:45,269 INFO L226 Difference]: Without dead ends: 60749 [2021-11-09 09:19:45,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:19:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60749 states. [2021-11-09 09:19:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60749 to 59387. [2021-11-09 09:19:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59387 states, 59385 states have (on average 1.7986528584659425) internal successors, (106813), 59386 states have internal predecessors, (106813), 0 states have call successors, (0), 0 states 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 09:19:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59387 states to 59387 states and 106813 transitions. [2021-11-09 09:19:48,179 INFO L78 Accepts]: Start accepts. Automaton has 59387 states and 106813 transitions. Word has length 83 [2021-11-09 09:19:48,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:48,179 INFO L470 AbstractCegarLoop]: Abstraction has 59387 states and 106813 transitions. [2021-11-09 09:19:48,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:48,179 INFO L276 IsEmpty]: Start isEmpty. Operand 59387 states and 106813 transitions. [2021-11-09 09:19:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 09:19:48,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:48,207 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] [2021-11-09 09:19:48,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 09:19:48,207 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash 284139084, now seen corresponding path program 1 times [2021-11-09 09:19:48,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:48,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280939563] [2021-11-09 09:19:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:48,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:48,265 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 09:19:48,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:48,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280939563] [2021-11-09 09:19:48,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280939563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:48,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:48,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:19:48,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036108748] [2021-11-09 09:19:48,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:19:48,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:19:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:19:48,268 INFO L87 Difference]: Start difference. First operand 59387 states and 106813 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:50,541 INFO L93 Difference]: Finished difference Result 59809 states and 107464 transitions. [2021-11-09 09:19:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:19:50,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-09 09:19:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:50,644 INFO L225 Difference]: With dead ends: 59809 [2021-11-09 09:19:50,644 INFO L226 Difference]: Without dead ends: 58832 [2021-11-09 09:19:50,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58832 states. [2021-11-09 09:19:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58832 to 58683. [2021-11-09 09:19:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58683 states, 58681 states have (on average 1.801417835415211) internal successors, (105709), 58682 states have internal predecessors, (105709), 0 states have call successors, (0), 0 states 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 09:19:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58683 states to 58683 states and 105709 transitions. [2021-11-09 09:19:53,193 INFO L78 Accepts]: Start accepts. Automaton has 58683 states and 105709 transitions. Word has length 83 [2021-11-09 09:19:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:53,193 INFO L470 AbstractCegarLoop]: Abstraction has 58683 states and 105709 transitions. [2021-11-09 09:19:53,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 58683 states and 105709 transitions. [2021-11-09 09:19:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 09:19:53,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:53,247 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:53,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 09:19:53,247 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1253440620, now seen corresponding path program 1 times [2021-11-09 09:19:53,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:53,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641345959] [2021-11-09 09:19:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:53,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:53,331 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 09:19:53,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:53,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641345959] [2021-11-09 09:19:53,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641345959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:53,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:53,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:19:53,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418575514] [2021-11-09 09:19:53,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:19:53,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:19:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:19:53,334 INFO L87 Difference]: Start difference. First operand 58683 states and 105709 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 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)