./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label58.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label58.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa --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 18d91842aba67b15ef1ce5fcca24e96a1a752cfb2bfcabae8ea7bcde2585be09 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:16:29,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:16:29,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:16:29,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:16:29,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:16:29,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:16:29,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:16:29,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:16:29,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:16:29,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:16:29,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:16:29,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:16:29,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:16:29,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:16:29,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:16:29,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:16:29,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:16:29,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:16:29,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:16:29,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:16:29,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:16:29,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:16:29,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:16:29,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:16:29,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:16:29,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:16:29,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:16:29,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:16:29,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:16:29,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:16:29,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:16:29,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:16:29,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:16:29,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:16:29,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:16:29,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:16:29,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:16:29,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:16:29,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:16:29,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:16:29,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:16:29,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:16:29,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:16:29,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:16:29,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:16:29,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:16:29,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:16:29,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:16:29,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:16:29,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:16:29,481 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:16:29,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:16:29,482 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:16:29,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:16:29,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:16:29,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:16:29,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:16:29,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:16:29,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:16:29,483 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:16:29,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:16:29,483 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:16:29,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:16:29,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:16:29,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:16:29,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:16:29,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:16:29,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:16:29,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:16:29,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:16:29,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:16:29,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:16:29,484 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:16:29,484 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:16:29,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:16:29,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:16:29,485 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_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18d91842aba67b15ef1ce5fcca24e96a1a752cfb2bfcabae8ea7bcde2585be09 [2021-12-06 17:16:29,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:16:29,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:16:29,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:16:29,680 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:16:29,681 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:16:29,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem13_label58.c [2021-12-06 17:16:29,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/data/5281d5dd4/7a7431fce48441779330090f59e6d31d/FLAG29c4113d4 [2021-12-06 17:16:30,316 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:16:30,316 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/sv-benchmarks/c/eca-rers2012/Problem13_label58.c [2021-12-06 17:16:30,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/data/5281d5dd4/7a7431fce48441779330090f59e6d31d/FLAG29c4113d4 [2021-12-06 17:16:30,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/data/5281d5dd4/7a7431fce48441779330090f59e6d31d [2021-12-06 17:16:30,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:16:30,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:16:30,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:16:30,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:16:30,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:16:30,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:16:30" (1/1) ... [2021-12-06 17:16:30,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a7f194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:30, skipping insertion in model container [2021-12-06 17:16:30,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:16:30" (1/1) ... [2021-12-06 17:16:30,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:16:30,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:16:31,082 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/sv-benchmarks/c/eca-rers2012/Problem13_label58.c[2071,2084] [2021-12-06 17:16:31,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:16:31,812 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:16:31,826 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/sv-benchmarks/c/eca-rers2012/Problem13_label58.c[2071,2084] [2021-12-06 17:16:32,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:16:32,312 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:16:32,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32 WrapperNode [2021-12-06 17:16:32,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:16:32,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:16:32,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:16:32,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:16:32,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:32,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:32,726 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-06 17:16:32,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:16:32,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:16:32,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:16:32,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:16:32,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:32,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:32,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:32,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:32,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:33,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:33,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:33,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:16:33,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:16:33,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:16:33,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:16:33,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (1/1) ... [2021-12-06 17:16:33,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:16:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:16:33,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:16:33,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:16:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:16:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:16:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:16:33,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:16:33,217 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:16:33,218 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:16:36,706 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:16:36,720 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:16:36,721 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:16:36,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:16:36 BoogieIcfgContainer [2021-12-06 17:16:36,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:16:36,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:16:36,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:16:36,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:16:36,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:16:30" (1/3) ... [2021-12-06 17:16:36,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47680b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:16:36, skipping insertion in model container [2021-12-06 17:16:36,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:16:32" (2/3) ... [2021-12-06 17:16:36,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47680b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:16:36, skipping insertion in model container [2021-12-06 17:16:36,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:16:36" (3/3) ... [2021-12-06 17:16:36,729 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label58.c [2021-12-06 17:16:36,733 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:16:36,733 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:16:36,779 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:16:36,785 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 [2021-12-06 17:16:36,785 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:16:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:16:36,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:16:36,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:16:36,816 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:16:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:16:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times [2021-12-06 17:16:36,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:16:36,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708699966] [2021-12-06 17:16:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:36,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:16:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:36,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:16:36,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708699966] [2021-12-06 17:16:36,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708699966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:16:36,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:16:36,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:16:36,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457526951] [2021-12-06 17:16:36,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:16:36,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:16:36,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:16:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:16:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:36,980 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:16:40,460 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-06 17:16:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:16:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-06 17:16:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:16:40,489 INFO L225 Difference]: With dead ends: 3121 [2021-12-06 17:16:40,489 INFO L226 Difference]: Without dead ends: 1944 [2021-12-06 17:16:40,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:40,499 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 977 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:16:40,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 17:16:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-06 17:16:40,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-06 17:16:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-06 17:16:40,588 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 12 [2021-12-06 17:16:40,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:16:40,588 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-06 17:16:40,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:40,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-06 17:16:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 17:16:40,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:16:40,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:16:40,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:16:40,591 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:16:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:16:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -873389910, now seen corresponding path program 1 times [2021-12-06 17:16:40,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:16:40,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191687772] [2021-12-06 17:16:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:40,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:16:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:40,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:16:40,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191687772] [2021-12-06 17:16:40,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191687772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:16:40,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:16:40,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:16:40,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254215420] [2021-12-06 17:16:40,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:16:40,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:16:40,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:16:40,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:16:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:40,706 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 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) [2021-12-06 17:16:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:16:43,594 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2021-12-06 17:16:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:16:43,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 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 [2021-12-06 17:16:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:16:43,610 INFO L225 Difference]: With dead ends: 5351 [2021-12-06 17:16:43,610 INFO L226 Difference]: Without dead ends: 3480 [2021-12-06 17:16:43,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:43,614 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:16:43,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 17:16:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-12-06 17:16:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2021-12-06 17:16:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2021-12-06 17:16:43,682 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 77 [2021-12-06 17:16:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:16:43,683 INFO L470 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2021-12-06 17:16:43,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 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) [2021-12-06 17:16:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2021-12-06 17:16:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 17:16:43,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:16:43,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:16:43,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:16:43,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:16:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:16:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1023071909, now seen corresponding path program 1 times [2021-12-06 17:16:43,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:16:43,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678444053] [2021-12-06 17:16:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:43,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:16:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:43,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:16:43,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678444053] [2021-12-06 17:16:43,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678444053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:16:43,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:16:43,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:16:43,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003020715] [2021-12-06 17:16:43,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:16:43,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:16:43,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:16:43,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:16:43,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:43,758 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:16:46,536 INFO L93 Difference]: Finished difference Result 10144 states and 15439 transitions. [2021-12-06 17:16:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:16:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 17:16:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:16:46,561 INFO L225 Difference]: With dead ends: 10144 [2021-12-06 17:16:46,561 INFO L226 Difference]: Without dead ends: 6667 [2021-12-06 17:16:46,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:46,565 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 977 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:16:46,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 879 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 17:16:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-12-06 17:16:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6657. [2021-12-06 17:16:46,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2021-12-06 17:16:46,662 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 79 [2021-12-06 17:16:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:16:46,663 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2021-12-06 17:16:46,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2021-12-06 17:16:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 17:16:46,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:16:46,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:16:46,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:16:46,664 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:16:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:16:46,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1614025002, now seen corresponding path program 1 times [2021-12-06 17:16:46,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:16:46,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044206193] [2021-12-06 17:16:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:46,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:16:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:46,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:16:46,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044206193] [2021-12-06 17:16:46,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044206193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:16:46,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:16:46,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:16:46,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748997605] [2021-12-06 17:16:46,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:16:46,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:16:46,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:16:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:16:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:46,727 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:16:49,451 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2021-12-06 17:16:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:16:49,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 17:16:49,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:16:49,498 INFO L225 Difference]: With dead ends: 19637 [2021-12-06 17:16:49,498 INFO L226 Difference]: Without dead ends: 12982 [2021-12-06 17:16:49,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:49,506 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 791 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:16:49,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 1163 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 17:16:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2021-12-06 17:16:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12175. [2021-12-06 17:16:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12175 states, 12174 states have (on average 1.2529160505996386) internal successors, (15253), 12174 states have internal predecessors, (15253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12175 states to 12175 states and 15253 transitions. [2021-12-06 17:16:49,657 INFO L78 Accepts]: Start accepts. Automaton has 12175 states and 15253 transitions. Word has length 85 [2021-12-06 17:16:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:16:49,657 INFO L470 AbstractCegarLoop]: Abstraction has 12175 states and 15253 transitions. [2021-12-06 17:16:49,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 12175 states and 15253 transitions. [2021-12-06 17:16:49,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 17:16:49,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:16:49,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:16:49,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:16:49,659 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:16:49,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:16:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash -583563538, now seen corresponding path program 1 times [2021-12-06 17:16:49,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:16:49,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039583369] [2021-12-06 17:16:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:49,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:16:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:49,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:16:49,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039583369] [2021-12-06 17:16:49,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039583369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:16:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843909872] [2021-12-06 17:16:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:49,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:16:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:16:49,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:16:49,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:16:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:49,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:16:49,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:16:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:16:49,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:16:49,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843909872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:16:49,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:16:49,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-06 17:16:49,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753543876] [2021-12-06 17:16:49,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:16:49,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:16:49,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:16:49,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:16:49,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:16:49,979 INFO L87 Difference]: Start difference. First operand 12175 states and 15253 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:16:52,818 INFO L93 Difference]: Finished difference Result 36312 states and 45491 transitions. [2021-12-06 17:16:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:16:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-06 17:16:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:16:52,866 INFO L225 Difference]: With dead ends: 36312 [2021-12-06 17:16:52,866 INFO L226 Difference]: Without dead ends: 24139 [2021-12-06 17:16:52,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:16:52,878 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 1053 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:16:52,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 922 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 17:16:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24139 states. [2021-12-06 17:16:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24139 to 24121. [2021-12-06 17:16:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24121 states, 24120 states have (on average 1.2004145936981758) internal successors, (28954), 24120 states have internal predecessors, (28954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:53,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24121 states to 24121 states and 28954 transitions. [2021-12-06 17:16:53,127 INFO L78 Accepts]: Start accepts. Automaton has 24121 states and 28954 transitions. Word has length 101 [2021-12-06 17:16:53,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:16:53,127 INFO L470 AbstractCegarLoop]: Abstraction has 24121 states and 28954 transitions. [2021-12-06 17:16:53,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 24121 states and 28954 transitions. [2021-12-06 17:16:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 17:16:53,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:16:53,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:16:53,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:16:53,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:16:53,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:16:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:16:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1395611265, now seen corresponding path program 1 times [2021-12-06 17:16:53,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:16:53,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27140207] [2021-12-06 17:16:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:53,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:16:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:16:53,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:16:53,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27140207] [2021-12-06 17:16:53,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27140207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:16:53,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:16:53,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:16:53,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768213615] [2021-12-06 17:16:53,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:16:53,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:16:53,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:16:53,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:16:53,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:53,455 INFO L87 Difference]: Start difference. First operand 24121 states and 28954 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:16:55,965 INFO L93 Difference]: Finished difference Result 49027 states and 58708 transitions. [2021-12-06 17:16:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:16:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-12-06 17:16:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:16:55,996 INFO L225 Difference]: With dead ends: 49027 [2021-12-06 17:16:55,996 INFO L226 Difference]: Without dead ends: 24908 [2021-12-06 17:16:56,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:56,013 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:16:56,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 17:16:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24908 states. [2021-12-06 17:16:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24908 to 24908. [2021-12-06 17:16:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24908 states, 24907 states have (on average 1.1942827317621552) internal successors, (29746), 24907 states have internal predecessors, (29746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24908 states to 24908 states and 29746 transitions. [2021-12-06 17:16:56,317 INFO L78 Accepts]: Start accepts. Automaton has 24908 states and 29746 transitions. Word has length 204 [2021-12-06 17:16:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:16:56,317 INFO L470 AbstractCegarLoop]: Abstraction has 24908 states and 29746 transitions. [2021-12-06 17:16:56,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 24908 states and 29746 transitions. [2021-12-06 17:16:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-06 17:16:56,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:16:56,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:16:56,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:16:56,320 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:16:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:16:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash -302953078, now seen corresponding path program 1 times [2021-12-06 17:16:56,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:16:56,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565243601] [2021-12-06 17:16:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:56,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:16:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:56,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:16:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565243601] [2021-12-06 17:16:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565243601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:16:56,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:16:56,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:16:56,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047553803] [2021-12-06 17:16:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:16:56,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:16:56,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:16:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:16:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:56,421 INFO L87 Difference]: Start difference. First operand 24908 states and 29746 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:16:59,287 INFO L93 Difference]: Finished difference Result 61634 states and 75007 transitions. [2021-12-06 17:16:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:16:59,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 211 [2021-12-06 17:16:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:16:59,319 INFO L225 Difference]: With dead ends: 61634 [2021-12-06 17:16:59,320 INFO L226 Difference]: Without dead ends: 37515 [2021-12-06 17:16:59,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:59,333 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 860 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:16:59,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 946 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 17:16:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37515 states. [2021-12-06 17:16:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37515 to 35930. [2021-12-06 17:16:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35930 states, 35929 states have (on average 1.1822761557516213) internal successors, (42478), 35929 states have internal predecessors, (42478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35930 states to 35930 states and 42478 transitions. [2021-12-06 17:16:59,641 INFO L78 Accepts]: Start accepts. Automaton has 35930 states and 42478 transitions. Word has length 211 [2021-12-06 17:16:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:16:59,642 INFO L470 AbstractCegarLoop]: Abstraction has 35930 states and 42478 transitions. [2021-12-06 17:16:59,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 35930 states and 42478 transitions. [2021-12-06 17:16:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-06 17:16:59,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:16:59,645 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:16:59,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:16:59,645 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:16:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:16:59,645 INFO L85 PathProgramCache]: Analyzing trace with hash -679347293, now seen corresponding path program 1 times [2021-12-06 17:16:59,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:16:59,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634216797] [2021-12-06 17:16:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:59,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:16:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:59,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:16:59,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634216797] [2021-12-06 17:16:59,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634216797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:16:59,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:16:59,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:16:59,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022614412] [2021-12-06 17:16:59,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:16:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:16:59,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:16:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:16:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:16:59,721 INFO L87 Difference]: Start difference. First operand 35930 states and 42478 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:02,321 INFO L93 Difference]: Finished difference Result 70920 states and 83955 transitions. [2021-12-06 17:17:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:17:02,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2021-12-06 17:17:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:02,354 INFO L225 Difference]: With dead ends: 70920 [2021-12-06 17:17:02,354 INFO L226 Difference]: Without dead ends: 35779 [2021-12-06 17:17:02,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:17:02,370 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 1036 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:02,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1641 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 17:17:02,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35779 states. [2021-12-06 17:17:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35779 to 34201. [2021-12-06 17:17:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34201 states, 34200 states have (on average 1.1295906432748537) internal successors, (38632), 34200 states have internal predecessors, (38632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34201 states to 34201 states and 38632 transitions. [2021-12-06 17:17:02,666 INFO L78 Accepts]: Start accepts. Automaton has 34201 states and 38632 transitions. Word has length 226 [2021-12-06 17:17:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:02,667 INFO L470 AbstractCegarLoop]: Abstraction has 34201 states and 38632 transitions. [2021-12-06 17:17:02,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 34201 states and 38632 transitions. [2021-12-06 17:17:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-06 17:17:02,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:02,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:02,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:17:02,670 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:17:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:02,670 INFO L85 PathProgramCache]: Analyzing trace with hash -107437248, now seen corresponding path program 1 times [2021-12-06 17:17:02,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:17:02,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403223051] [2021-12-06 17:17:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:02,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:17:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 17:17:02,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:17:02,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403223051] [2021-12-06 17:17:02,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403223051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:02,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:02,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:17:02,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726977567] [2021-12-06 17:17:02,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:02,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:17:02,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:17:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:17:02,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:17:02,785 INFO L87 Difference]: Start difference. First operand 34201 states and 38632 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:07,405 INFO L93 Difference]: Finished difference Result 109366 states and 124639 transitions. [2021-12-06 17:17:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:17:07,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 300 [2021-12-06 17:17:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:07,481 INFO L225 Difference]: With dead ends: 109366 [2021-12-06 17:17:07,481 INFO L226 Difference]: Without dead ends: 75954 [2021-12-06 17:17:07,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:17:07,497 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 1807 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 4623 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 5796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 4623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:07,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 752 Invalid, 5796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1173 Valid, 4623 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 17:17:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75954 states. [2021-12-06 17:17:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75954 to 72802. [2021-12-06 17:17:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72802 states, 72801 states have (on average 1.120424169997665) internal successors, (81568), 72801 states have internal predecessors, (81568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72802 states to 72802 states and 81568 transitions. [2021-12-06 17:17:08,186 INFO L78 Accepts]: Start accepts. Automaton has 72802 states and 81568 transitions. Word has length 300 [2021-12-06 17:17:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:08,187 INFO L470 AbstractCegarLoop]: Abstraction has 72802 states and 81568 transitions. [2021-12-06 17:17:08,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 72802 states and 81568 transitions. [2021-12-06 17:17:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-06 17:17:08,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:08,190 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:08,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:17:08,191 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:17:08,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash -697400388, now seen corresponding path program 1 times [2021-12-06 17:17:08,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:17:08,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177274968] [2021-12-06 17:17:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:08,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:17:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:17:08,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:17:08,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177274968] [2021-12-06 17:17:08,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177274968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:08,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:08,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:17:08,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692281945] [2021-12-06 17:17:08,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:08,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:17:08,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:17:08,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:17:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:17:08,290 INFO L87 Difference]: Start difference. First operand 72802 states and 81568 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:14,615 INFO L93 Difference]: Finished difference Result 202479 states and 227410 transitions. [2021-12-06 17:17:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:17:14,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 300 [2021-12-06 17:17:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:14,815 INFO L225 Difference]: With dead ends: 202479 [2021-12-06 17:17:14,816 INFO L226 Difference]: Without dead ends: 130466 [2021-12-06 17:17:14,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:17:14,833 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 1726 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 5971 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 7085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 5971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:14,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1726 Valid, 731 Invalid, 7085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 5971 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 17:17:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130466 states. [2021-12-06 17:17:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130466 to 128762. [2021-12-06 17:17:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128762 states, 128761 states have (on average 1.1134427349896319) internal successors, (143368), 128761 states have internal predecessors, (143368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128762 states to 128762 states and 143368 transitions. [2021-12-06 17:17:16,112 INFO L78 Accepts]: Start accepts. Automaton has 128762 states and 143368 transitions. Word has length 300 [2021-12-06 17:17:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:16,112 INFO L470 AbstractCegarLoop]: Abstraction has 128762 states and 143368 transitions. [2021-12-06 17:17:16,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 128762 states and 143368 transitions. [2021-12-06 17:17:16,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-06 17:17:16,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:16,116 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:16,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:17:16,116 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:17:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash -920626445, now seen corresponding path program 1 times [2021-12-06 17:17:16,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:17:16,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763983479] [2021-12-06 17:17:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:16,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:17:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-06 17:17:16,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:17:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763983479] [2021-12-06 17:17:16,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763983479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:16,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:16,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:17:16,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978737372] [2021-12-06 17:17:16,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:16,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:17:16,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:17:16,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:17:16,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:17:16,206 INFO L87 Difference]: Start difference. First operand 128762 states and 143368 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:19,586 INFO L93 Difference]: Finished difference Result 243358 states and 271906 transitions. [2021-12-06 17:17:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:17:19,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 309 [2021-12-06 17:17:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:19,713 INFO L225 Difference]: With dead ends: 243358 [2021-12-06 17:17:19,713 INFO L226 Difference]: Without dead ends: 127987 [2021-12-06 17:17:19,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:17:19,815 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 728 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 2688 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:19,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1176 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2688 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 17:17:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127987 states. [2021-12-06 17:17:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127987 to 127188. [2021-12-06 17:17:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127188 states, 127187 states have (on average 1.1140525368158696) internal successors, (141693), 127187 states have internal predecessors, (141693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127188 states to 127188 states and 141693 transitions. [2021-12-06 17:17:21,139 INFO L78 Accepts]: Start accepts. Automaton has 127188 states and 141693 transitions. Word has length 309 [2021-12-06 17:17:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:21,139 INFO L470 AbstractCegarLoop]: Abstraction has 127188 states and 141693 transitions. [2021-12-06 17:17:21,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 127188 states and 141693 transitions. [2021-12-06 17:17:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-12-06 17:17:21,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:21,143 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:21,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:17:21,143 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:17:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash -89253303, now seen corresponding path program 1 times [2021-12-06 17:17:21,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:17:21,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093944140] [2021-12-06 17:17:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:21,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:17:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 188 proven. 113 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:17:21,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:17:21,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093944140] [2021-12-06 17:17:21,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093944140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:17:21,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165020949] [2021-12-06 17:17:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:21,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:17:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:17:21,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:17:21,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:17:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:21,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:17:21,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-06 17:17:21,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:21,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165020949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:21,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:17:21,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-06 17:17:21,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619062440] [2021-12-06 17:17:21,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:21,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:17:21,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:17:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:17:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:17:21,817 INFO L87 Difference]: Start difference. First operand 127188 states and 141693 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:24,844 INFO L93 Difference]: Finished difference Result 253586 states and 282592 transitions. [2021-12-06 17:17:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:17:24,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 338 [2021-12-06 17:17:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:24,973 INFO L225 Difference]: With dead ends: 253586 [2021-12-06 17:17:24,973 INFO L226 Difference]: Without dead ends: 127187 [2021-12-06 17:17:25,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:17:25,011 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:25,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1421 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 17:17:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127187 states. [2021-12-06 17:17:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127187 to 127185. [2021-12-06 17:17:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127185 states, 127184 states have (on average 1.085451000125802) internal successors, (138052), 127184 states have internal predecessors, (138052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127185 states to 127185 states and 138052 transitions. [2021-12-06 17:17:26,311 INFO L78 Accepts]: Start accepts. Automaton has 127185 states and 138052 transitions. Word has length 338 [2021-12-06 17:17:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:26,312 INFO L470 AbstractCegarLoop]: Abstraction has 127185 states and 138052 transitions. [2021-12-06 17:17:26,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 127185 states and 138052 transitions. [2021-12-06 17:17:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-06 17:17:26,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:26,321 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:26,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:17:26,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:17:26,523 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:17:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:26,525 INFO L85 PathProgramCache]: Analyzing trace with hash 826877036, now seen corresponding path program 1 times [2021-12-06 17:17:26,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:17:26,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20168993] [2021-12-06 17:17:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:26,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:17:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 17:17:26,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:17:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20168993] [2021-12-06 17:17:26,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20168993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:26,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:26,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:17:26,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28534635] [2021-12-06 17:17:26,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:26,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:17:26,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:17:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:17:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:17:26,687 INFO L87 Difference]: Start difference. First operand 127185 states and 138052 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:30,301 INFO L93 Difference]: Finished difference Result 292945 states and 320174 transitions. [2021-12-06 17:17:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:17:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 406 [2021-12-06 17:17:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:30,471 INFO L225 Difference]: With dead ends: 292945 [2021-12-06 17:17:30,471 INFO L226 Difference]: Without dead ends: 164188 [2021-12-06 17:17:30,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:17:30,518 INFO L933 BasicCegarLoop]: 1750 mSDtfsCounter, 785 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 3244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:30,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1894 Invalid, 3244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 17:17:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164188 states. [2021-12-06 17:17:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164188 to 161023. [2021-12-06 17:17:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161023 states, 161022 states have (on average 1.0724310963719244) internal successors, (172685), 161022 states have internal predecessors, (172685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161023 states to 161023 states and 172685 transitions. [2021-12-06 17:17:32,138 INFO L78 Accepts]: Start accepts. Automaton has 161023 states and 172685 transitions. Word has length 406 [2021-12-06 17:17:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:32,138 INFO L470 AbstractCegarLoop]: Abstraction has 161023 states and 172685 transitions. [2021-12-06 17:17:32,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 161023 states and 172685 transitions. [2021-12-06 17:17:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-12-06 17:17:32,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:32,144 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:32,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:17:32,145 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:17:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:32,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2077582457, now seen corresponding path program 1 times [2021-12-06 17:17:32,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:17:32,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747096336] [2021-12-06 17:17:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:32,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:17:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 260 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:17:32,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:17:32,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747096336] [2021-12-06 17:17:32,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747096336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:17:32,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6063292] [2021-12-06 17:17:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:32,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:17:32,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:17:32,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:17:32,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:17:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:17:32,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-06 17:17:32,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:32,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6063292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:32,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:17:32,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 17:17:32,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590978064] [2021-12-06 17:17:32,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:32,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:17:32,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:17:32,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:17:32,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:17:32,751 INFO L87 Difference]: Start difference. First operand 161023 states and 172685 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:36,758 INFO L93 Difference]: Finished difference Result 354320 states and 382192 transitions. [2021-12-06 17:17:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:17:36,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 428 [2021-12-06 17:17:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:36,965 INFO L225 Difference]: With dead ends: 354320 [2021-12-06 17:17:36,965 INFO L226 Difference]: Without dead ends: 194086 [2021-12-06 17:17:37,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:17:37,022 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 1023 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 3365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:37,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 734 Invalid, 3365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 17:17:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194086 states. [2021-12-06 17:17:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194086 to 191704. [2021-12-06 17:17:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191704 states, 191703 states have (on average 1.0757630292692342) internal successors, (206227), 191703 states have internal predecessors, (206227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191704 states to 191704 states and 206227 transitions. [2021-12-06 17:17:38,860 INFO L78 Accepts]: Start accepts. Automaton has 191704 states and 206227 transitions. Word has length 428 [2021-12-06 17:17:38,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:38,861 INFO L470 AbstractCegarLoop]: Abstraction has 191704 states and 206227 transitions. [2021-12-06 17:17:38,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:38,861 INFO L276 IsEmpty]: Start isEmpty. Operand 191704 states and 206227 transitions. [2021-12-06 17:17:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2021-12-06 17:17:38,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:38,876 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2021-12-06 17:17:38,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 17:17:39,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:17:39,077 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:17:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash -851661849, now seen corresponding path program 1 times [2021-12-06 17:17:39,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:17:39,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732191227] [2021-12-06 17:17:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:39,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:17:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 768 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-06 17:17:39,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:17:39,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732191227] [2021-12-06 17:17:39,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732191227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:39,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:39,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:17:39,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104750362] [2021-12-06 17:17:39,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:39,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:17:39,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:17:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:17:39,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:17:39,229 INFO L87 Difference]: Start difference. First operand 191704 states and 206227 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:42,994 INFO L93 Difference]: Finished difference Result 384202 states and 413257 transitions. [2021-12-06 17:17:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:17:42,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 525 [2021-12-06 17:17:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:43,199 INFO L225 Difference]: With dead ends: 384202 [2021-12-06 17:17:43,199 INFO L226 Difference]: Without dead ends: 193287 [2021-12-06 17:17:43,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:17:43,260 INFO L933 BasicCegarLoop]: 1397 mSDtfsCounter, 934 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:43,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 1482 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 17:17:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193287 states. [2021-12-06 17:17:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193287 to 191697. [2021-12-06 17:17:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191697 states, 191696 states have (on average 1.0583371588348218) internal successors, (202879), 191696 states have internal predecessors, (202879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191697 states to 191697 states and 202879 transitions. [2021-12-06 17:17:45,018 INFO L78 Accepts]: Start accepts. Automaton has 191697 states and 202879 transitions. Word has length 525 [2021-12-06 17:17:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:45,018 INFO L470 AbstractCegarLoop]: Abstraction has 191697 states and 202879 transitions. [2021-12-06 17:17:45,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:45,018 INFO L276 IsEmpty]: Start isEmpty. Operand 191697 states and 202879 transitions. [2021-12-06 17:17:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2021-12-06 17:17:45,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:45,037 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:45,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:17:45,037 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:17:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1699556428, now seen corresponding path program 1 times [2021-12-06 17:17:45,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:17:45,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395249669] [2021-12-06 17:17:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:45,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:17:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 460 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-12-06 17:17:45,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:17:45,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395249669] [2021-12-06 17:17:45,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395249669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:45,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:45,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:17:45,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608536380] [2021-12-06 17:17:45,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:45,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:17:45,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:17:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:17:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:45,425 INFO L87 Difference]: Start difference. First operand 191697 states and 202879 transitions. Second operand has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:49,246 INFO L93 Difference]: Finished difference Result 374710 states and 397517 transitions. [2021-12-06 17:17:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:17:49,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 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 566 [2021-12-06 17:17:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:49,493 INFO L225 Difference]: With dead ends: 374710 [2021-12-06 17:17:49,493 INFO L226 Difference]: Without dead ends: 201909 [2021-12-06 17:17:49,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:17:49,561 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 2502 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 3081 mSolverCounterSat, 1433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2502 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 4514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1433 IncrementalHoareTripleChecker+Valid, 3081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:49,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2502 Valid, 373 Invalid, 4514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1433 Valid, 3081 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 17:17:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201909 states. [2021-12-06 17:17:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201909 to 201894. [2021-12-06 17:17:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201894 states, 201893 states have (on average 1.0549647585602275) internal successors, (212990), 201893 states have internal predecessors, (212990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201894 states to 201894 states and 212990 transitions. [2021-12-06 17:17:51,933 INFO L78 Accepts]: Start accepts. Automaton has 201894 states and 212990 transitions. Word has length 566 [2021-12-06 17:17:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:51,935 INFO L470 AbstractCegarLoop]: Abstraction has 201894 states and 212990 transitions. [2021-12-06 17:17:51,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 201894 states and 212990 transitions. [2021-12-06 17:17:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2021-12-06 17:17:51,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:51,967 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:51,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:17:51,968 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:17:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1604066583, now seen corresponding path program 1 times [2021-12-06 17:17:51,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:17:51,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536815622] [2021-12-06 17:17:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:51,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:17:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 526 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 17:17:52,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:17:52,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536815622] [2021-12-06 17:17:52,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536815622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:52,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:52,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:17:52,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472613047] [2021-12-06 17:17:52,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:52,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:17:52,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:17:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:17:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:17:52,113 INFO L87 Difference]: Start difference. First operand 201894 states and 212990 transitions. Second operand has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:59,425 INFO L93 Difference]: Finished difference Result 515744 states and 544805 transitions. [2021-12-06 17:17:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:17:59,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 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 616 [2021-12-06 17:17:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:59,764 INFO L225 Difference]: With dead ends: 515744 [2021-12-06 17:17:59,764 INFO L226 Difference]: Without dead ends: 314639 [2021-12-06 17:17:59,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:17:59,820 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 1709 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 6316 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 7417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 6316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:59,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 909 Invalid, 7417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 6316 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-06 17:18:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314639 states. [2021-12-06 17:18:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314639 to 262523. [2021-12-06 17:18:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262523 states, 262522 states have (on average 1.0522965694303716) internal successors, (276251), 262522 states have internal predecessors, (276251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262523 states to 262523 states and 276251 transitions. [2021-12-06 17:18:03,003 INFO L78 Accepts]: Start accepts. Automaton has 262523 states and 276251 transitions. Word has length 616 [2021-12-06 17:18:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:03,003 INFO L470 AbstractCegarLoop]: Abstraction has 262523 states and 276251 transitions. [2021-12-06 17:18:03,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 262523 states and 276251 transitions. [2021-12-06 17:18:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2021-12-06 17:18:03,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:03,028 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:03,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:18:03,029 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:18:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash 454870419, now seen corresponding path program 1 times [2021-12-06 17:18:03,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:18:03,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979253275] [2021-12-06 17:18:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:03,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:18:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 498 proven. 110 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 17:18:03,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:18:03,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979253275] [2021-12-06 17:18:03,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979253275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:18:03,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353161383] [2021-12-06 17:18:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:03,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:18:03,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:18:03,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:18:03,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:18:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:03,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:18:03,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:18:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-06 17:18:04,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:18:04,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353161383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:18:04,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:18:04,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 17:18:04,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027440401] [2021-12-06 17:18:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:18:04,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:18:04,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:18:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:18:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:18:04,083 INFO L87 Difference]: Start difference. First operand 262523 states and 276251 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:08,546 INFO L93 Difference]: Finished difference Result 547856 states and 576696 transitions. [2021-12-06 17:18:08,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:18:08,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 676 [2021-12-06 17:18:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:08,888 INFO L225 Difference]: With dead ends: 547856 [2021-12-06 17:18:08,888 INFO L226 Difference]: Without dead ends: 301864 [2021-12-06 17:18:08,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:18:08,986 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 924 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 3199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:08,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1674 Invalid, 3199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 2499 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 17:18:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301864 states. [2021-12-06 17:18:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301864 to 277461. [2021-12-06 17:18:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277461 states, 277460 states have (on average 1.047498738556909) internal successors, (290639), 277460 states have internal predecessors, (290639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277461 states to 277461 states and 290639 transitions. [2021-12-06 17:18:12,057 INFO L78 Accepts]: Start accepts. Automaton has 277461 states and 290639 transitions. Word has length 676 [2021-12-06 17:18:12,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:12,057 INFO L470 AbstractCegarLoop]: Abstraction has 277461 states and 290639 transitions. [2021-12-06 17:18:12,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 277461 states and 290639 transitions. [2021-12-06 17:18:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2021-12-06 17:18:12,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:12,091 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:12,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:18:12,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 17:18:12,293 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:18:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -350639216, now seen corresponding path program 1 times [2021-12-06 17:18:12,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:18:12,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774075979] [2021-12-06 17:18:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:12,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:18:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-06 17:18:12,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:18:12,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774075979] [2021-12-06 17:18:12,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774075979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:18:12,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:18:12,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:18:12,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21363996] [2021-12-06 17:18:12,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:18:12,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:18:12,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:18:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:18:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:18:12,501 INFO L87 Difference]: Start difference. First operand 277461 states and 290639 transitions. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 2 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:15,400 INFO L93 Difference]: Finished difference Result 532860 states and 558623 transitions. [2021-12-06 17:18:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:18:15,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 2 states have internal predecessors, (394), 0 states have call successors, (0), 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 715 [2021-12-06 17:18:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:15,804 INFO L225 Difference]: With dead ends: 532860 [2021-12-06 17:18:15,804 INFO L226 Difference]: Without dead ends: 275080 [2021-12-06 17:18:15,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:18:15,868 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 1660 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:15,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1660 Valid, 269 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 17:18:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275080 states. [2021-12-06 17:18:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275080 to 275077. [2021-12-06 17:18:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275077 states, 275076 states have (on average 1.0471069813433378) internal successors, (288034), 275076 states have internal predecessors, (288034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275077 states to 275077 states and 288034 transitions. [2021-12-06 17:18:18,748 INFO L78 Accepts]: Start accepts. Automaton has 275077 states and 288034 transitions. Word has length 715 [2021-12-06 17:18:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:18,748 INFO L470 AbstractCegarLoop]: Abstraction has 275077 states and 288034 transitions. [2021-12-06 17:18:18,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 2 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 275077 states and 288034 transitions. [2021-12-06 17:18:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2021-12-06 17:18:18,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:18,773 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:18,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:18:18,773 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:18:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash -686785272, now seen corresponding path program 1 times [2021-12-06 17:18:18,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:18:18,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847620253] [2021-12-06 17:18:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:18,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:18:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 724 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-12-06 17:18:19,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:18:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847620253] [2021-12-06 17:18:19,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847620253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:18:19,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:18:19,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:18:19,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968075669] [2021-12-06 17:18:19,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:18:19,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:18:19,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:18:19,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:18:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:18:19,151 INFO L87 Difference]: Start difference. First operand 275077 states and 288034 transitions. Second operand has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:25,008 INFO L93 Difference]: Finished difference Result 638371 states and 671078 transitions. [2021-12-06 17:18:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:18:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 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 719 [2021-12-06 17:18:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:25,416 INFO L225 Difference]: With dead ends: 638371 [2021-12-06 17:18:25,416 INFO L226 Difference]: Without dead ends: 382188 [2021-12-06 17:18:25,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:18:25,491 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 1564 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3894 mSolverCounterSat, 1196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 5090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1196 IncrementalHoareTripleChecker+Valid, 3894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:25,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1564 Valid, 765 Invalid, 5090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1196 Valid, 3894 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-06 17:18:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382188 states. [2021-12-06 17:18:28,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382188 to 352248. [2021-12-06 17:18:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352248 states, 352247 states have (on average 1.0414652218471698) internal successors, (366853), 352247 states have internal predecessors, (366853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352248 states to 352248 states and 366853 transitions. [2021-12-06 17:18:29,589 INFO L78 Accepts]: Start accepts. Automaton has 352248 states and 366853 transitions. Word has length 719 [2021-12-06 17:18:29,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:29,589 INFO L470 AbstractCegarLoop]: Abstraction has 352248 states and 366853 transitions. [2021-12-06 17:18:29,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 352248 states and 366853 transitions. [2021-12-06 17:18:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2021-12-06 17:18:29,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:29,610 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:29,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 17:18:29,610 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:18:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:29,610 INFO L85 PathProgramCache]: Analyzing trace with hash -799059320, now seen corresponding path program 1 times [2021-12-06 17:18:29,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:18:29,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832242997] [2021-12-06 17:18:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:29,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:18:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-12-06 17:18:29,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:18:29,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832242997] [2021-12-06 17:18:29,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832242997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:18:29,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:18:29,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:18:29,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847636385] [2021-12-06 17:18:29,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:18:29,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:18:29,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:18:29,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:18:29,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:18:29,764 INFO L87 Difference]: Start difference. First operand 352248 states and 366853 transitions. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:34,119 INFO L93 Difference]: Finished difference Result 681671 states and 710287 transitions. [2021-12-06 17:18:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:18:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 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 722 [2021-12-06 17:18:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:34,499 INFO L225 Difference]: With dead ends: 681671 [2021-12-06 17:18:34,499 INFO L226 Difference]: Without dead ends: 330212 [2021-12-06 17:18:34,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:18:34,599 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 740 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:34,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 1756 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 17:18:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330212 states. [2021-12-06 17:18:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330212 to 325480. [2021-12-06 17:18:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325480 states, 325479 states have (on average 1.0353202510761064) internal successors, (336975), 325479 states have internal predecessors, (336975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325480 states to 325480 states and 336975 transitions. [2021-12-06 17:18:38,341 INFO L78 Accepts]: Start accepts. Automaton has 325480 states and 336975 transitions. Word has length 722 [2021-12-06 17:18:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:38,342 INFO L470 AbstractCegarLoop]: Abstraction has 325480 states and 336975 transitions. [2021-12-06 17:18:38,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 325480 states and 336975 transitions. [2021-12-06 17:18:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2021-12-06 17:18:38,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:38,388 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:38,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 17:18:38,389 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:18:38,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:38,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1648419864, now seen corresponding path program 1 times [2021-12-06 17:18:38,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:18:38,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261945258] [2021-12-06 17:18:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:38,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:18:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 549 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-12-06 17:18:38,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:18:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261945258] [2021-12-06 17:18:38,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261945258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:18:38,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:18:38,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:18:38,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097585646] [2021-12-06 17:18:38,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:18:38,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:18:38,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:18:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:18:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:18:38,653 INFO L87 Difference]: Start difference. First operand 325480 states and 336975 transitions. Second operand has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:43,365 INFO L93 Difference]: Finished difference Result 673824 states and 698274 transitions. [2021-12-06 17:18:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:18:43,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 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 927 [2021-12-06 17:18:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:43,911 INFO L225 Difference]: With dead ends: 673824 [2021-12-06 17:18:43,911 INFO L226 Difference]: Without dead ends: 364879 [2021-12-06 17:18:44,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:18:44,028 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 750 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 3288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:44,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 596 Invalid, 3288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 17:18:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364879 states. [2021-12-06 17:18:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364879 to 343606. [2021-12-06 17:18:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343606 states, 343605 states have (on average 1.03518866139899) internal successors, (355696), 343605 states have internal predecessors, (355696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343606 states to 343606 states and 355696 transitions. [2021-12-06 17:18:47,868 INFO L78 Accepts]: Start accepts. Automaton has 343606 states and 355696 transitions. Word has length 927 [2021-12-06 17:18:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:47,869 INFO L470 AbstractCegarLoop]: Abstraction has 343606 states and 355696 transitions. [2021-12-06 17:18:47,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 343606 states and 355696 transitions. [2021-12-06 17:18:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2021-12-06 17:18:47,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:47,937 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:47,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 17:18:47,937 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:18:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:47,938 INFO L85 PathProgramCache]: Analyzing trace with hash -657806963, now seen corresponding path program 1 times [2021-12-06 17:18:47,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:18:47,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327368895] [2021-12-06 17:18:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:47,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:18:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 419 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:18:48,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:18:48,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327368895] [2021-12-06 17:18:48,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327368895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:18:48,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554409324] [2021-12-06 17:18:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:48,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:18:48,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:18:48,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:18:48,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:18:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:18:48,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:18:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-12-06 17:18:49,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:18:49,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554409324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:18:49,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:18:49,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-06 17:18:49,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976687180] [2021-12-06 17:18:49,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:18:49,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:18:49,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:18:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:18:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:18:49,811 INFO L87 Difference]: Start difference. First operand 343606 states and 355696 transitions. Second operand has 3 states, 3 states have (on average 322.3333333333333) internal successors, (967), 2 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:54,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:54,912 INFO L93 Difference]: Finished difference Result 678571 states and 702692 transitions. [2021-12-06 17:18:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:18:54,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 322.3333333333333) internal successors, (967), 2 states have internal predecessors, (967), 0 states have call successors, (0), 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 1099 [2021-12-06 17:18:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:55,299 INFO L225 Difference]: With dead ends: 678571 [2021-12-06 17:18:55,299 INFO L226 Difference]: Without dead ends: 349135 [2021-12-06 17:18:55,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1103 GetRequests, 1098 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:18:55,396 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 542 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:55,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 1088 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-06 17:18:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349135 states. [2021-12-06 17:18:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349135 to 345186. [2021-12-06 17:18:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345186 states, 345185 states have (on average 1.0316120341266277) internal successors, (356097), 345185 states have internal predecessors, (356097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345186 states to 345186 states and 356097 transitions. [2021-12-06 17:18:59,219 INFO L78 Accepts]: Start accepts. Automaton has 345186 states and 356097 transitions. Word has length 1099 [2021-12-06 17:18:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:59,220 INFO L470 AbstractCegarLoop]: Abstraction has 345186 states and 356097 transitions. [2021-12-06 17:18:59,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.3333333333333) internal successors, (967), 2 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 345186 states and 356097 transitions. [2021-12-06 17:18:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1233 [2021-12-06 17:18:59,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:59,318 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:59,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:18:59,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 17:18:59,519 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:18:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:59,520 INFO L85 PathProgramCache]: Analyzing trace with hash 791210827, now seen corresponding path program 1 times [2021-12-06 17:18:59,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:18:59,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555958665] [2021-12-06 17:18:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:59,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:18:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 837 proven. 75 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-06 17:18:59,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:18:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555958665] [2021-12-06 17:18:59,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555958665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:18:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826247850] [2021-12-06 17:18:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:59,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:18:59,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:18:59,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:18:59,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:19:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:19:00,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:19:00,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:19:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 975 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-06 17:19:01,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:19:01,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826247850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:19:01,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:19:01,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-06 17:19:01,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583245893] [2021-12-06 17:19:01,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:19:01,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:19:01,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:19:01,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:19:01,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:19:01,803 INFO L87 Difference]: Start difference. First operand 345186 states and 356097 transitions. Second operand has 4 states, 4 states have (on average 287.75) internal successors, (1151), 4 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:19:06,328 INFO L93 Difference]: Finished difference Result 678563 states and 700206 transitions. [2021-12-06 17:19:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:19:06,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 287.75) internal successors, (1151), 4 states have internal predecessors, (1151), 0 states have call successors, (0), 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 1232 [2021-12-06 17:19:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:19:06,714 INFO L225 Difference]: With dead ends: 678563 [2021-12-06 17:19:06,714 INFO L226 Difference]: Without dead ends: 347545 [2021-12-06 17:19:06,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1235 GetRequests, 1232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:19:06,835 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 2294 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 3219 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2294 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 3715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 3219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:19:06,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2294 Valid, 714 Invalid, 3715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 3219 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 17:19:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347545 states. [2021-12-06 17:19:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347545 to 334147. [2021-12-06 17:19:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334147 states, 334146 states have (on average 1.0288017812572947) internal successors, (343770), 334146 states have internal predecessors, (343770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334147 states to 334147 states and 343770 transitions. [2021-12-06 17:19:10,679 INFO L78 Accepts]: Start accepts. Automaton has 334147 states and 343770 transitions. Word has length 1232 [2021-12-06 17:19:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:19:10,680 INFO L470 AbstractCegarLoop]: Abstraction has 334147 states and 343770 transitions. [2021-12-06 17:19:10,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.75) internal successors, (1151), 4 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 334147 states and 343770 transitions. [2021-12-06 17:19:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1304 [2021-12-06 17:19:10,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:19:10,780 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:19:10,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 17:19:10,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba54571e-6cd5-41e8-a199-882ec2ad2894/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:19:10,982 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:19:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:19:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1411918382, now seen corresponding path program 1 times [2021-12-06 17:19:10,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:19:10,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066344923] [2021-12-06 17:19:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:19:10,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:19:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:19:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 967 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-12-06 17:19:11,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:19:11,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066344923] [2021-12-06 17:19:11,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066344923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:19:11,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:19:11,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:19:11,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480663245] [2021-12-06 17:19:11,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:19:11,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:19:11,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:19:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:19:11,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:19:11,381 INFO L87 Difference]: Start difference. First operand 334147 states and 343770 transitions. Second operand has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:19:15,632 INFO L93 Difference]: Finished difference Result 662797 states and 681881 transitions. [2021-12-06 17:19:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:19:15,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1303 [2021-12-06 17:19:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:19:15,982 INFO L225 Difference]: With dead ends: 662797 [2021-12-06 17:19:15,982 INFO L226 Difference]: Without dead ends: 327076 [2021-12-06 17:19:16,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:19:16,102 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 607 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:19:16,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 1643 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 17:19:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327076 states. [2021-12-06 17:19:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327076 to 316015. [2021-12-06 17:19:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316015 states, 316014 states have (on average 1.0253153341307664) internal successors, (324014), 316014 states have internal predecessors, (324014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316015 states to 316015 states and 324014 transitions. [2021-12-06 17:19:19,497 INFO L78 Accepts]: Start accepts. Automaton has 316015 states and 324014 transitions. Word has length 1303 [2021-12-06 17:19:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:19:19,497 INFO L470 AbstractCegarLoop]: Abstraction has 316015 states and 324014 transitions. [2021-12-06 17:19:19,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 316015 states and 324014 transitions. [2021-12-06 17:19:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1379 [2021-12-06 17:19:19,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:19:19,605 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:19:19,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 17:19:19,605 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:19:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:19:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1322230254, now seen corresponding path program 1 times [2021-12-06 17:19:19,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:19:19,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497729504] [2021-12-06 17:19:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:19:19,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:19:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:19:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 1051 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-06 17:19:20,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:19:20,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497729504] [2021-12-06 17:19:20,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497729504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:19:20,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:19:20,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:19:20,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98512404] [2021-12-06 17:19:20,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:19:20,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:19:20,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:19:20,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:19:20,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:19:20,225 INFO L87 Difference]: Start difference. First operand 316015 states and 324014 transitions. Second operand has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:19:24,039 INFO L93 Difference]: Finished difference Result 617875 states and 633705 transitions. [2021-12-06 17:19:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:19:24,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 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 1378 [2021-12-06 17:19:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:19:24,371 INFO L225 Difference]: With dead ends: 617875 [2021-12-06 17:19:24,372 INFO L226 Difference]: Without dead ends: 316028 [2021-12-06 17:19:24,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:19:24,481 INFO L933 BasicCegarLoop]: 1553 mSDtfsCounter, 614 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:19:24,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 1674 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 17:19:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316028 states. [2021-12-06 17:19:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316028 to 312075. [2021-12-06 17:19:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312075 states, 312074 states have (on average 1.023452770817178) internal successors, (319393), 312074 states have internal predecessors, (319393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312075 states to 312075 states and 319393 transitions. [2021-12-06 17:19:27,870 INFO L78 Accepts]: Start accepts. Automaton has 312075 states and 319393 transitions. Word has length 1378 [2021-12-06 17:19:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:19:27,871 INFO L470 AbstractCegarLoop]: Abstraction has 312075 states and 319393 transitions. [2021-12-06 17:19:27,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 312075 states and 319393 transitions. [2021-12-06 17:19:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1384 [2021-12-06 17:19:27,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:19:27,976 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:19:27,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 17:19:27,976 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:19:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:19:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash 701472949, now seen corresponding path program 1 times [2021-12-06 17:19:27,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:19:27,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520669688] [2021-12-06 17:19:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:19:27,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:19:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:19:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2783 backedges. 1165 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-12-06 17:19:28,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:19:28,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520669688] [2021-12-06 17:19:28,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520669688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:19:28,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:19:28,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:19:28,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887728063] [2021-12-06 17:19:28,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:19:28,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:19:28,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:19:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:19:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:19:28,358 INFO L87 Difference]: Start difference. First operand 312075 states and 319393 transitions. Second operand has 4 states, 4 states have (on average 184.0) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:19:36,140 INFO L93 Difference]: Finished difference Result 645499 states and 660567 transitions. [2021-12-06 17:19:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:19:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 184.0) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 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 1383 [2021-12-06 17:19:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:19:36,538 INFO L225 Difference]: With dead ends: 645499 [2021-12-06 17:19:36,538 INFO L226 Difference]: Without dead ends: 344446 [2021-12-06 17:19:36,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:19:36,787 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 1616 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 5544 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 6129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 5544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:19:36,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1616 Valid, 687 Invalid, 6129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 5544 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-06 17:19:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344446 states. [2021-12-06 17:19:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344446 to 327030. [2021-12-06 17:19:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327030 states, 327029 states have (on average 1.0232181243865224) internal successors, (334622), 327029 states have internal predecessors, (334622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327030 states to 327030 states and 334622 transitions. [2021-12-06 17:19:40,273 INFO L78 Accepts]: Start accepts. Automaton has 327030 states and 334622 transitions. Word has length 1383 [2021-12-06 17:19:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:19:40,274 INFO L470 AbstractCegarLoop]: Abstraction has 327030 states and 334622 transitions. [2021-12-06 17:19:40,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.0) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 327030 states and 334622 transitions. [2021-12-06 17:19:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1474 [2021-12-06 17:19:40,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:19:40,371 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:19:40,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 17:19:40,371 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:19:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:19:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1000895438, now seen corresponding path program 1 times [2021-12-06 17:19:40,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:19:40,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219706809] [2021-12-06 17:19:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:19:40,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:19:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:19:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 2078 trivial. 0 not checked. [2021-12-06 17:19:40,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:19:40,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219706809] [2021-12-06 17:19:40,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219706809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:19:40,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:19:40,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:19:40,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996334425] [2021-12-06 17:19:40,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:19:40,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:19:40,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:19:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:19:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:19:40,827 INFO L87 Difference]: Start difference. First operand 327030 states and 334622 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:19:45,881 INFO L93 Difference]: Finished difference Result 679325 states and 695426 transitions. [2021-12-06 17:19:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:19:45,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 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 1473 [2021-12-06 17:19:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:19:46,286 INFO L225 Difference]: With dead ends: 679325 [2021-12-06 17:19:46,287 INFO L226 Difference]: Without dead ends: 368830 [2021-12-06 17:19:46,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:19:46,413 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 989 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:19:46,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 327 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2560 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-06 17:19:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368830 states. [2021-12-06 17:19:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368830 to 325448. [2021-12-06 17:19:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325448 states, 325447 states have (on average 1.0230820993894552) internal successors, (332959), 325447 states have internal predecessors, (332959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325448 states to 325448 states and 332959 transitions. [2021-12-06 17:19:50,155 INFO L78 Accepts]: Start accepts. Automaton has 325448 states and 332959 transitions. Word has length 1473 [2021-12-06 17:19:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:19:50,156 INFO L470 AbstractCegarLoop]: Abstraction has 325448 states and 332959 transitions. [2021-12-06 17:19:50,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 325448 states and 332959 transitions. [2021-12-06 17:19:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1521 [2021-12-06 17:19:50,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:19:50,465 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:19:50,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 17:19:50,465 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:19:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:19:50,466 INFO L85 PathProgramCache]: Analyzing trace with hash -81628276, now seen corresponding path program 1 times [2021-12-06 17:19:50,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:19:50,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595386933] [2021-12-06 17:19:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:19:50,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:19:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:19:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 1042 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:19:50,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:19:50,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595386933] [2021-12-06 17:19:50,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595386933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:19:50,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:19:50,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:19:50,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779497606] [2021-12-06 17:19:50,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:19:50,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:19:50,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:19:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:19:50,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:19:50,927 INFO L87 Difference]: Start difference. First operand 325448 states and 332959 transitions. Second operand has 4 states, 4 states have (on average 377.75) internal successors, (1511), 4 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:19:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:19:57,340 INFO L93 Difference]: Finished difference Result 737635 states and 754978 transitions. [2021-12-06 17:19:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:19:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 377.75) internal successors, (1511), 4 states have internal predecessors, (1511), 0 states have call successors, (0), 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 1520 [2021-12-06 17:19:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:19:57,842 INFO L225 Difference]: With dead ends: 737635 [2021-12-06 17:19:57,842 INFO L226 Difference]: Without dead ends: 416913 [2021-12-06 17:19:57,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:19:57,982 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 1886 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4500 mSolverCounterSat, 1547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1886 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 6047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1547 IncrementalHoareTripleChecker+Valid, 4500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:19:57,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1886 Valid, 433 Invalid, 6047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1547 Valid, 4500 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-06 17:19:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416913 states. [2021-12-06 17:20:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416913 to 372685. [2021-12-06 17:20:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372685 states, 372684 states have (on average 1.0240310826330081) internal successors, (381640), 372684 states have internal predecessors, (381640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372685 states to 372685 states and 381640 transitions. [2021-12-06 17:20:02,313 INFO L78 Accepts]: Start accepts. Automaton has 372685 states and 381640 transitions. Word has length 1520 [2021-12-06 17:20:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:02,314 INFO L470 AbstractCegarLoop]: Abstraction has 372685 states and 381640 transitions. [2021-12-06 17:20:02,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 377.75) internal successors, (1511), 4 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 372685 states and 381640 transitions. [2021-12-06 17:20:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1564 [2021-12-06 17:20:02,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:02,428 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:02,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 17:20:02,428 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:02,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash -480237875, now seen corresponding path program 1 times [2021-12-06 17:20:02,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:02,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550215082] [2021-12-06 17:20:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:02,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2339 backedges. 2045 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-12-06 17:20:03,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550215082] [2021-12-06 17:20:03,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550215082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:20:03,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:20:03,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:20:03,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977239838] [2021-12-06 17:20:03,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:20:03,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:20:03,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:03,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:20:03,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:20:03,130 INFO L87 Difference]: Start difference. First operand 372685 states and 381640 transitions. Second operand has 4 states, 4 states have (on average 320.5) internal successors, (1282), 4 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:07,972 INFO L93 Difference]: Finished difference Result 737494 states and 755326 transitions. [2021-12-06 17:20:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:20:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 320.5) internal successors, (1282), 4 states have internal predecessors, (1282), 0 states have call successors, (0), 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 1563 [2021-12-06 17:20:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:08,366 INFO L225 Difference]: With dead ends: 737494 [2021-12-06 17:20:08,367 INFO L226 Difference]: Without dead ends: 374259 [2021-12-06 17:20:08,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:20:08,494 INFO L933 BasicCegarLoop]: 1349 mSDtfsCounter, 1443 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 5265 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 5480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 5265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:08,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 1579 Invalid, 5480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 5265 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 17:20:08,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374259 states. [2021-12-06 17:20:11,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374259 to 370322. [2021-12-06 17:20:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370322 states, 370321 states have (on average 1.0230799765608756) internal successors, (378868), 370321 states have internal predecessors, (378868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370322 states to 370322 states and 378868 transitions. [2021-12-06 17:20:12,408 INFO L78 Accepts]: Start accepts. Automaton has 370322 states and 378868 transitions. Word has length 1563 [2021-12-06 17:20:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:12,409 INFO L470 AbstractCegarLoop]: Abstraction has 370322 states and 378868 transitions. [2021-12-06 17:20:12,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 320.5) internal successors, (1282), 4 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 370322 states and 378868 transitions. [2021-12-06 17:20:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1592 [2021-12-06 17:20:12,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:12,724 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:12,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 17:20:12,724 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1062563768, now seen corresponding path program 1 times [2021-12-06 17:20:12,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968995812] [2021-12-06 17:20:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:12,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2872 backedges. 1604 proven. 0 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2021-12-06 17:20:13,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:13,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968995812] [2021-12-06 17:20:13,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968995812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:20:13,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:20:13,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:20:13,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877857487] [2021-12-06 17:20:13,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:20:13,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:20:13,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:13,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:20:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:20:13,210 INFO L87 Difference]: Start difference. First operand 370322 states and 378868 transitions. Second operand has 3 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:18,069 INFO L93 Difference]: Finished difference Result 730451 states and 747329 transitions. [2021-12-06 17:20:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:20:18,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 0 states have call successors, (0), 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 1591 [2021-12-06 17:20:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:18,462 INFO L225 Difference]: With dead ends: 730451 [2021-12-06 17:20:18,462 INFO L226 Difference]: Without dead ends: 371155 [2021-12-06 17:20:18,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:20:18,594 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 899 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:18,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 403 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 17:20:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371155 states. [2021-12-06 17:20:21,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371155 to 336455. [2021-12-06 17:20:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336455 states, 336454 states have (on average 1.0226182479625743) internal successors, (344064), 336454 states have internal predecessors, (344064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336455 states to 336455 states and 344064 transitions. [2021-12-06 17:20:22,428 INFO L78 Accepts]: Start accepts. Automaton has 336455 states and 344064 transitions. Word has length 1591 [2021-12-06 17:20:22,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:22,429 INFO L470 AbstractCegarLoop]: Abstraction has 336455 states and 344064 transitions. [2021-12-06 17:20:22,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 336455 states and 344064 transitions. [2021-12-06 17:20:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1650 [2021-12-06 17:20:22,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:22,554 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:22,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 17:20:22,554 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1916614583, now seen corresponding path program 1 times [2021-12-06 17:20:22,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:22,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851174122] [2021-12-06 17:20:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:22,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2818 backedges. 2182 proven. 0 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2021-12-06 17:20:23,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:23,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851174122] [2021-12-06 17:20:23,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851174122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:20:23,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:20:23,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:20:23,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080664402] [2021-12-06 17:20:23,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:20:23,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:20:23,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:20:23,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:20:23,301 INFO L87 Difference]: Start difference. First operand 336455 states and 344064 transitions. Second operand has 4 states, 4 states have (on average 280.5) internal successors, (1122), 4 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:28,774 INFO L93 Difference]: Finished difference Result 680840 states and 696220 transitions. [2021-12-06 17:20:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:20:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 280.5) internal successors, (1122), 4 states have internal predecessors, (1122), 0 states have call successors, (0), 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 1649 [2021-12-06 17:20:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:29,147 INFO L225 Difference]: With dead ends: 680840 [2021-12-06 17:20:29,147 INFO L226 Difference]: Without dead ends: 355411 [2021-12-06 17:20:29,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:20:29,266 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 1533 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 5049 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 5782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 5049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:29,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 545 Invalid, 5782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 5049 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-06 17:20:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355411 states. [2021-12-06 17:20:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355411 to 327005. [2021-12-06 17:20:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327005 states, 327004 states have (on average 1.0222474342821495) internal successors, (334279), 327004 states have internal predecessors, (334279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327005 states to 327005 states and 334279 transitions. [2021-12-06 17:20:33,140 INFO L78 Accepts]: Start accepts. Automaton has 327005 states and 334279 transitions. Word has length 1649 [2021-12-06 17:20:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:33,140 INFO L470 AbstractCegarLoop]: Abstraction has 327005 states and 334279 transitions. [2021-12-06 17:20:33,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 280.5) internal successors, (1122), 4 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 327005 states and 334279 transitions. [2021-12-06 17:20:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2021-12-06 17:20:33,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:33,286 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:33,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 17:20:33,286 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:33,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash -556656736, now seen corresponding path program 1 times [2021-12-06 17:20:33,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:33,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577519711] [2021-12-06 17:20:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:33,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2874 backedges. 1801 proven. 0 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2021-12-06 17:20:33,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:33,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577519711] [2021-12-06 17:20:33,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577519711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:20:33,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:20:33,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:20:33,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023021954] [2021-12-06 17:20:33,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:20:33,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:20:33,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:20:33,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:20:33,912 INFO L87 Difference]: Start difference. First operand 327005 states and 334279 transitions. Second operand has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:38,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:38,339 INFO L93 Difference]: Finished difference Result 648474 states and 663143 transitions. [2021-12-06 17:20:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:20:38,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 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 1690 [2021-12-06 17:20:38,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:38,655 INFO L225 Difference]: With dead ends: 648474 [2021-12-06 17:20:38,655 INFO L226 Difference]: Without dead ends: 331707 [2021-12-06 17:20:38,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:20:38,748 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 832 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 828 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:38,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 459 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 17:20:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331707 states. [2021-12-06 17:20:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331707 to 307287. [2021-12-06 17:20:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307287 states, 307286 states have (on average 1.0217972833126143) internal successors, (313984), 307286 states have internal predecessors, (313984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307287 states to 307287 states and 313984 transitions. [2021-12-06 17:20:42,382 INFO L78 Accepts]: Start accepts. Automaton has 307287 states and 313984 transitions. Word has length 1690 [2021-12-06 17:20:42,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:42,383 INFO L470 AbstractCegarLoop]: Abstraction has 307287 states and 313984 transitions. [2021-12-06 17:20:42,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 307287 states and 313984 transitions. [2021-12-06 17:20:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1842 [2021-12-06 17:20:42,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:42,517 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:42,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 17:20:42,518 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:42,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash -273249330, now seen corresponding path program 1 times [2021-12-06 17:20:42,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:42,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650360298] [2021-12-06 17:20:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:42,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2524 backedges. 2038 proven. 0 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2021-12-06 17:20:43,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:43,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650360298] [2021-12-06 17:20:43,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650360298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:20:43,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:20:43,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:20:43,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903731691] [2021-12-06 17:20:43,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:20:43,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:20:43,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:20:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:20:43,359 INFO L87 Difference]: Start difference. First operand 307287 states and 313984 transitions. Second operand has 4 states, 4 states have (on average 342.0) internal successors, (1368), 3 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:49,753 INFO L93 Difference]: Finished difference Result 655630 states and 669823 transitions. [2021-12-06 17:20:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:20:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 342.0) internal successors, (1368), 3 states have internal predecessors, (1368), 0 states have call successors, (0), 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 1841 [2021-12-06 17:20:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:50,142 INFO L225 Difference]: With dead ends: 655630 [2021-12-06 17:20:50,142 INFO L226 Difference]: Without dead ends: 353069 [2021-12-06 17:20:50,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:20:50,251 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 986 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 5285 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 6032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 5285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:50,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 676 Invalid, 6032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 5285 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-06 17:20:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353069 states.