./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label45.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label45.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN --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 e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:35:36,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:35:36,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:35:36,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:35:36,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:35:36,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:35:36,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:35:36,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:35:36,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:35:36,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:35:36,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:35:36,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:35:36,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:35:36,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:35:36,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:35:36,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:35:36,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:35:36,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:35:36,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:35:36,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:35:36,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:35:36,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:35:36,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:35:36,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:35:36,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:35:36,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:35:36,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:35:36,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:35:36,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:35:36,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:35:36,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:35:36,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:35:36,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:35:36,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:35:36,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:35:36,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:35:36,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:35:36,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:35:36,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:35:36,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:35:36,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:35:36,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:35:36,564 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:35:36,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:35:36,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:35:36,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:35:36,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:35:36,568 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:35:36,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:35:36,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:35:36,570 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:35:36,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:35:36,572 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:35:36,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:35:36,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:35:36,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:35:36,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:35:36,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:35:36,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:35:36,574 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:35:36,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:35:36,575 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:35:36,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:35:36,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:35:36,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:35:36,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:35:36,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:35:36,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:35:36,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:35:36,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:35:36,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:35:36,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:35:36,580 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:35:36,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:35:36,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:35:36,581 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_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af [2022-11-20 11:35:37,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:35:37,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:35:37,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:35:37,067 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:35:37,068 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:35:37,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2022-11-20 11:35:40,925 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:35:41,491 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:35:41,492 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2022-11-20 11:35:41,515 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/data/21d3c8e38/d1649472a6a34c5d93ae419a97402072/FLAG4453e0596 [2022-11-20 11:35:41,540 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/data/21d3c8e38/d1649472a6a34c5d93ae419a97402072 [2022-11-20 11:35:41,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:35:41,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:35:41,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:35:41,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:35:41,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:35:41,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:41" (1/1) ... [2022-11-20 11:35:41,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b0448cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:41, skipping insertion in model container [2022-11-20 11:35:41,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:41" (1/1) ... [2022-11-20 11:35:41,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:35:41,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:35:42,503 WARN L237 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_4085f947-8d97-49b9-a909-ba770f5afee6/sv-benchmarks/c/eca-rers2012/Problem03_label45.c[53653,53666] [2022-11-20 11:35:42,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:35:42,589 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:35:42,911 WARN L237 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_4085f947-8d97-49b9-a909-ba770f5afee6/sv-benchmarks/c/eca-rers2012/Problem03_label45.c[53653,53666] [2022-11-20 11:35:42,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:35:43,011 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:35:43,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43 WrapperNode [2022-11-20 11:35:43,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:35:43,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:35:43,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:35:43,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:35:43,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,259 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-20 11:35:43,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:35:43,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:35:43,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:35:43,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:35:43,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,431 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:35:43,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:35:43,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:35:43,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:35:43,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2022-11-20 11:35:43,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:35:43,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:35:43,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:35:43,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:35:43,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:35:43,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:35:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:35:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:35:43,738 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:35:43,741 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:35:46,304 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:35:46,329 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:35:46,330 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:35:46,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:46 BoogieIcfgContainer [2022-11-20 11:35:46,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:35:46,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:35:46,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:35:46,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:35:46,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:35:41" (1/3) ... [2022-11-20 11:35:46,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570639be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:46, skipping insertion in model container [2022-11-20 11:35:46,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (2/3) ... [2022-11-20 11:35:46,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570639be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:46, skipping insertion in model container [2022-11-20 11:35:46,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:46" (3/3) ... [2022-11-20 11:35:46,350 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label45.c [2022-11-20 11:35:46,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:35:46,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:35:46,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:35:46,479 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@34443160, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:35:46,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:35:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-20 11:35:46,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:35:46,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:35:46,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:35:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1107694590, now seen corresponding path program 1 times [2022-11-20 11:35:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:46,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005076905] [2022-11-20 11:35:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:46,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:48,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005076905] [2022-11-20 11:35:48,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005076905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:48,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:48,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:35:48,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34410885] [2022-11-20 11:35:48,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:48,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:35:48,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:35:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:35:48,194 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:35:50,002 INFO L93 Difference]: Finished difference Result 840 states and 1490 transitions. [2022-11-20 11:35:50,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:35:50,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2022-11-20 11:35:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:35:50,031 INFO L225 Difference]: With dead ends: 840 [2022-11-20 11:35:50,034 INFO L226 Difference]: Without dead ends: 460 [2022-11-20 11:35:50,043 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:35:50,048 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 120 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:35:50,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 134 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 11:35:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-20 11:35:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 445. [2022-11-20 11:35:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.614864864864865) internal successors, (717), 444 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 717 transitions. [2022-11-20 11:35:50,154 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 717 transitions. Word has length 144 [2022-11-20 11:35:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:35:50,157 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 717 transitions. [2022-11-20 11:35:50,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 717 transitions. [2022-11-20 11:35:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-20 11:35:50,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:35:50,163 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:35:50,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:35:50,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:35:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash -235311730, now seen corresponding path program 1 times [2022-11-20 11:35:50,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:50,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004948366] [2022-11-20 11:35:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:50,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:50,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:50,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004948366] [2022-11-20 11:35:50,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004948366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:50,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:50,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:35:50,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374894320] [2022-11-20 11:35:50,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:50,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:35:50,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:50,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:35:50,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:35:50,714 INFO L87 Difference]: Start difference. First operand 445 states and 717 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:35:52,125 INFO L93 Difference]: Finished difference Result 1324 states and 2138 transitions. [2022-11-20 11:35:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:35:52,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2022-11-20 11:35:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:35:52,132 INFO L225 Difference]: With dead ends: 1324 [2022-11-20 11:35:52,132 INFO L226 Difference]: Without dead ends: 881 [2022-11-20 11:35:52,134 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:35:52,135 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:35:52,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 125 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:35:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-20 11:35:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 877. [2022-11-20 11:35:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.595890410958904) internal successors, (1398), 876 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1398 transitions. [2022-11-20 11:35:52,178 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1398 transitions. Word has length 150 [2022-11-20 11:35:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:35:52,179 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1398 transitions. [2022-11-20 11:35:52,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1398 transitions. [2022-11-20 11:35:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-20 11:35:52,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:35:52,186 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:35:52,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:35:52,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:35:52,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1640240486, now seen corresponding path program 1 times [2022-11-20 11:35:52,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:52,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519488413] [2022-11-20 11:35:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:52,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:52,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519488413] [2022-11-20 11:35:52,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519488413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:52,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:52,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:35:52,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708043094] [2022-11-20 11:35:52,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:52,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:35:52,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:35:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:35:52,548 INFO L87 Difference]: Start difference. First operand 877 states and 1398 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:35:53,961 INFO L93 Difference]: Finished difference Result 2565 states and 4101 transitions. [2022-11-20 11:35:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:35:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2022-11-20 11:35:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:35:53,971 INFO L225 Difference]: With dead ends: 2565 [2022-11-20 11:35:53,971 INFO L226 Difference]: Without dead ends: 1690 [2022-11-20 11:35:53,979 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:35:53,985 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:35:53,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 192 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:35:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2022-11-20 11:35:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2022-11-20 11:35:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.3860272350503255) internal successors, (2341), 1689 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2341 transitions. [2022-11-20 11:35:54,060 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2341 transitions. Word has length 150 [2022-11-20 11:35:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:35:54,060 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 2341 transitions. [2022-11-20 11:35:54,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2341 transitions. [2022-11-20 11:35:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-20 11:35:54,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:35:54,069 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:35:54,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:35:54,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:35:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1267325975, now seen corresponding path program 1 times [2022-11-20 11:35:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:54,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529885380] [2022-11-20 11:35:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:54,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529885380] [2022-11-20 11:35:54,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529885380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:54,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:54,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:35:54,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819658945] [2022-11-20 11:35:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:54,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:35:54,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:35:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:35:54,540 INFO L87 Difference]: Start difference. First operand 1690 states and 2341 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:35:55,941 INFO L93 Difference]: Finished difference Result 5048 states and 6998 transitions. [2022-11-20 11:35:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:35:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2022-11-20 11:35:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:35:55,956 INFO L225 Difference]: With dead ends: 5048 [2022-11-20 11:35:55,957 INFO L226 Difference]: Without dead ends: 3360 [2022-11-20 11:35:55,960 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:35:55,961 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:35:55,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 206 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:35:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2022-11-20 11:35:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3351. [2022-11-20 11:35:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 3350 states have (on average 1.3722388059701494) internal successors, (4597), 3350 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4597 transitions. [2022-11-20 11:35:56,060 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4597 transitions. Word has length 156 [2022-11-20 11:35:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:35:56,061 INFO L495 AbstractCegarLoop]: Abstraction has 3351 states and 4597 transitions. [2022-11-20 11:35:56,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4597 transitions. [2022-11-20 11:35:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-20 11:35:56,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:35:56,070 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:35:56,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:35:56,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:35:56,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash -267079187, now seen corresponding path program 1 times [2022-11-20 11:35:56,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:56,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003089189] [2022-11-20 11:35:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:56,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:35:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:56,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003089189] [2022-11-20 11:35:56,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003089189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:56,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:56,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:35:56,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581399428] [2022-11-20 11:35:56,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:56,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:35:56,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:56,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:35:56,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:35:56,323 INFO L87 Difference]: Start difference. First operand 3351 states and 4597 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:35:57,728 INFO L93 Difference]: Finished difference Result 9992 states and 13723 transitions. [2022-11-20 11:35:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:35:57,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 158 [2022-11-20 11:35:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:35:57,757 INFO L225 Difference]: With dead ends: 9992 [2022-11-20 11:35:57,757 INFO L226 Difference]: Without dead ends: 6643 [2022-11-20 11:35:57,762 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:35:57,764 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:35:57,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:35:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2022-11-20 11:35:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6605. [2022-11-20 11:35:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6605 states, 6604 states have (on average 1.3452453058752272) internal successors, (8884), 6604 states have internal predecessors, (8884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6605 states to 6605 states and 8884 transitions. [2022-11-20 11:35:58,017 INFO L78 Accepts]: Start accepts. Automaton has 6605 states and 8884 transitions. Word has length 158 [2022-11-20 11:35:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:35:58,019 INFO L495 AbstractCegarLoop]: Abstraction has 6605 states and 8884 transitions. [2022-11-20 11:35:58,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6605 states and 8884 transitions. [2022-11-20 11:35:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-20 11:35:58,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:35:58,037 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2022-11-20 11:35:58,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:35:58,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:35:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1504485225, now seen corresponding path program 1 times [2022-11-20 11:35:58,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:58,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381493262] [2022-11-20 11:35:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:35:58,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:58,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381493262] [2022-11-20 11:35:58,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381493262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:58,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:58,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:35:58,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392472302] [2022-11-20 11:35:58,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:58,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:35:58,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:58,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:35:58,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:35:58,466 INFO L87 Difference]: Start difference. First operand 6605 states and 8884 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:00,093 INFO L93 Difference]: Finished difference Result 17695 states and 24239 transitions. [2022-11-20 11:36:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:00,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 172 [2022-11-20 11:36:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:00,142 INFO L225 Difference]: With dead ends: 17695 [2022-11-20 11:36:00,142 INFO L226 Difference]: Without dead ends: 11092 [2022-11-20 11:36:00,151 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:00,154 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:00,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 364 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 11:36:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11092 states. [2022-11-20 11:36:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11092 to 11082. [2022-11-20 11:36:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 1.2974460788737479) internal successors, (14377), 11081 states have internal predecessors, (14377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 14377 transitions. [2022-11-20 11:36:00,489 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 14377 transitions. Word has length 172 [2022-11-20 11:36:00,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:00,490 INFO L495 AbstractCegarLoop]: Abstraction has 11082 states and 14377 transitions. [2022-11-20 11:36:00,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 14377 transitions. [2022-11-20 11:36:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-20 11:36:00,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:00,509 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:00,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:36:00,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:00,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:00,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2111621614, now seen corresponding path program 1 times [2022-11-20 11:36:00,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:00,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614656255] [2022-11-20 11:36:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:00,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:01,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:01,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614656255] [2022-11-20 11:36:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614656255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:01,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622702752] [2022-11-20 11:36:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:01,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:01,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:01,164 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:01,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:36:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:01,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:36:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:36:01,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:36:01,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622702752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:01,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:36:01,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 11:36:01,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117104890] [2022-11-20 11:36:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:01,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:01,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:01,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:01,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:36:01,694 INFO L87 Difference]: Start difference. First operand 11082 states and 14377 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:03,147 INFO L93 Difference]: Finished difference Result 31946 states and 41599 transitions. [2022-11-20 11:36:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 181 [2022-11-20 11:36:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:03,227 INFO L225 Difference]: With dead ends: 31946 [2022-11-20 11:36:03,227 INFO L226 Difference]: Without dead ends: 20866 [2022-11-20 11:36:03,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:36:03,245 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 230 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:03,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 206 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 11:36:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20866 states. [2022-11-20 11:36:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20866 to 20862. [2022-11-20 11:36:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20862 states, 20861 states have (on average 1.268012079957816) internal successors, (26452), 20861 states have internal predecessors, (26452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20862 states to 20862 states and 26452 transitions. [2022-11-20 11:36:03,863 INFO L78 Accepts]: Start accepts. Automaton has 20862 states and 26452 transitions. Word has length 181 [2022-11-20 11:36:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:03,864 INFO L495 AbstractCegarLoop]: Abstraction has 20862 states and 26452 transitions. [2022-11-20 11:36:03,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 20862 states and 26452 transitions. [2022-11-20 11:36:03,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-20 11:36:03,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:03,891 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:03,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:04,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:04,101 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:04,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:04,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1871477101, now seen corresponding path program 1 times [2022-11-20 11:36:04,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:04,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989074560] [2022-11-20 11:36:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:36:04,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:04,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989074560] [2022-11-20 11:36:04,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989074560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:04,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:04,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:04,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082202024] [2022-11-20 11:36:04,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:04,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:04,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:04,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:04,786 INFO L87 Difference]: Start difference. First operand 20862 states and 26452 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:06,433 INFO L93 Difference]: Finished difference Result 48864 states and 62100 transitions. [2022-11-20 11:36:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 185 [2022-11-20 11:36:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:06,602 INFO L225 Difference]: With dead ends: 48864 [2022-11-20 11:36:06,602 INFO L226 Difference]: Without dead ends: 28004 [2022-11-20 11:36:06,622 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:06,623 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:06,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 361 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:36:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28004 states. [2022-11-20 11:36:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28004 to 27969. [2022-11-20 11:36:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27969 states, 27968 states have (on average 1.2254362128146452) internal successors, (34273), 27968 states have internal predecessors, (34273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27969 states to 27969 states and 34273 transitions. [2022-11-20 11:36:07,180 INFO L78 Accepts]: Start accepts. Automaton has 27969 states and 34273 transitions. Word has length 185 [2022-11-20 11:36:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:07,182 INFO L495 AbstractCegarLoop]: Abstraction has 27969 states and 34273 transitions. [2022-11-20 11:36:07,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 27969 states and 34273 transitions. [2022-11-20 11:36:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-20 11:36:07,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:07,217 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-20 11:36:07,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:36:07,218 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash 564235399, now seen corresponding path program 1 times [2022-11-20 11:36:07,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:07,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454133217] [2022-11-20 11:36:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:07,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:36:07,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454133217] [2022-11-20 11:36:07,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454133217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:07,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:07,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:07,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131104021] [2022-11-20 11:36:07,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:07,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:36:07,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:07,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:36:07,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:36:07,745 INFO L87 Difference]: Start difference. First operand 27969 states and 34273 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 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) [2022-11-20 11:36:09,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:09,367 INFO L93 Difference]: Finished difference Result 50148 states and 61194 transitions. [2022-11-20 11:36:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:36:09,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 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 200 [2022-11-20 11:36:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:09,419 INFO L225 Difference]: With dead ends: 50148 [2022-11-20 11:36:09,420 INFO L226 Difference]: Without dead ends: 22384 [2022-11-20 11:36:09,448 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:09,453 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 464 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:09,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 54 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:36:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22384 states. [2022-11-20 11:36:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22384 to 22384. [2022-11-20 11:36:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22384 states, 22383 states have (on average 1.1557878747263548) internal successors, (25870), 22383 states have internal predecessors, (25870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22384 states to 22384 states and 25870 transitions. [2022-11-20 11:36:09,979 INFO L78 Accepts]: Start accepts. Automaton has 22384 states and 25870 transitions. Word has length 200 [2022-11-20 11:36:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:09,979 INFO L495 AbstractCegarLoop]: Abstraction has 22384 states and 25870 transitions. [2022-11-20 11:36:09,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 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) [2022-11-20 11:36:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 22384 states and 25870 transitions. [2022-11-20 11:36:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-20 11:36:10,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:10,013 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:10,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:36:10,014 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1419350507, now seen corresponding path program 1 times [2022-11-20 11:36:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:10,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178116348] [2022-11-20 11:36:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:36:10,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178116348] [2022-11-20 11:36:10,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178116348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:10,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:10,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:36:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021700458] [2022-11-20 11:36:10,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:10,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:10,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:10,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:10,805 INFO L87 Difference]: Start difference. First operand 22384 states and 25870 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:12,455 INFO L93 Difference]: Finished difference Result 55756 states and 64725 transitions. [2022-11-20 11:36:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:12,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 213 [2022-11-20 11:36:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:12,529 INFO L225 Difference]: With dead ends: 55756 [2022-11-20 11:36:12,530 INFO L226 Difference]: Without dead ends: 33577 [2022-11-20 11:36:12,551 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:12,552 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:12,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 100 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:36:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33577 states. [2022-11-20 11:36:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33577 to 32956. [2022-11-20 11:36:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32956 states, 32955 states have (on average 1.1514489455317858) internal successors, (37946), 32955 states have internal predecessors, (37946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32956 states to 32956 states and 37946 transitions. [2022-11-20 11:36:13,231 INFO L78 Accepts]: Start accepts. Automaton has 32956 states and 37946 transitions. Word has length 213 [2022-11-20 11:36:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:13,232 INFO L495 AbstractCegarLoop]: Abstraction has 32956 states and 37946 transitions. [2022-11-20 11:36:13,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 32956 states and 37946 transitions. [2022-11-20 11:36:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-20 11:36:13,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:13,269 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:13,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:36:13,270 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:13,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1457404762, now seen corresponding path program 1 times [2022-11-20 11:36:13,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:13,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008341988] [2022-11-20 11:36:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:13,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 11:36:13,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008341988] [2022-11-20 11:36:13,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008341988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:13,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:13,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:13,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414135725] [2022-11-20 11:36:13,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:13,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:36:13,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:13,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:36:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:36:13,895 INFO L87 Difference]: Start difference. First operand 32956 states and 37946 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:16,072 INFO L93 Difference]: Finished difference Result 95627 states and 110910 transitions. [2022-11-20 11:36:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:36:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 230 [2022-11-20 11:36:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:16,179 INFO L225 Difference]: With dead ends: 95627 [2022-11-20 11:36:16,179 INFO L226 Difference]: Without dead ends: 63079 [2022-11-20 11:36:16,198 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:16,199 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 477 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:16,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 472 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 11:36:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63079 states. [2022-11-20 11:36:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63079 to 50459. [2022-11-20 11:36:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50459 states, 50458 states have (on average 1.1502041301676642) internal successors, (58037), 50458 states have internal predecessors, (58037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50459 states to 50459 states and 58037 transitions. [2022-11-20 11:36:17,442 INFO L78 Accepts]: Start accepts. Automaton has 50459 states and 58037 transitions. Word has length 230 [2022-11-20 11:36:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:17,442 INFO L495 AbstractCegarLoop]: Abstraction has 50459 states and 58037 transitions. [2022-11-20 11:36:17,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 50459 states and 58037 transitions. [2022-11-20 11:36:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-20 11:36:17,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:17,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:36:17,641 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2026881340, now seen corresponding path program 1 times [2022-11-20 11:36:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:17,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475765481] [2022-11-20 11:36:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:17,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-20 11:36:18,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475765481] [2022-11-20 11:36:18,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475765481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:18,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:18,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:36:18,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699612185] [2022-11-20 11:36:18,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:18,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:18,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:18,410 INFO L87 Difference]: Start difference. First operand 50459 states and 58037 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:20,399 INFO L93 Difference]: Finished difference Result 134481 states and 155084 transitions. [2022-11-20 11:36:20,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:20,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 295 [2022-11-20 11:36:20,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:20,522 INFO L225 Difference]: With dead ends: 134481 [2022-11-20 11:36:20,522 INFO L226 Difference]: Without dead ends: 84227 [2022-11-20 11:36:20,556 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:20,557 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 215 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:20,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 122 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:36:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84227 states. [2022-11-20 11:36:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84227 to 84220. [2022-11-20 11:36:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84220 states, 84219 states have (on average 1.1496811883304243) internal successors, (96825), 84219 states have internal predecessors, (96825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84220 states to 84220 states and 96825 transitions. [2022-11-20 11:36:22,463 INFO L78 Accepts]: Start accepts. Automaton has 84220 states and 96825 transitions. Word has length 295 [2022-11-20 11:36:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:22,463 INFO L495 AbstractCegarLoop]: Abstraction has 84220 states and 96825 transitions. [2022-11-20 11:36:22,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 84220 states and 96825 transitions. [2022-11-20 11:36:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-20 11:36:22,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:22,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:22,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:36:22,541 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash -679322528, now seen corresponding path program 1 times [2022-11-20 11:36:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:22,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835076605] [2022-11-20 11:36:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:22,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-20 11:36:23,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:23,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835076605] [2022-11-20 11:36:23,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835076605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:23,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:23,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:36:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717554844] [2022-11-20 11:36:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:23,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:23,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:23,974 INFO L87 Difference]: Start difference. First operand 84220 states and 96825 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:25,910 INFO L93 Difference]: Finished difference Result 189401 states and 218167 transitions. [2022-11-20 11:36:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:25,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 319 [2022-11-20 11:36:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:26,056 INFO L225 Difference]: With dead ends: 189401 [2022-11-20 11:36:26,057 INFO L226 Difference]: Without dead ends: 105386 [2022-11-20 11:36:26,111 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:26,112 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 157 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:26,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 141 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:36:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105386 states. [2022-11-20 11:36:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105386 to 105384. [2022-11-20 11:36:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105384 states, 105383 states have (on average 1.1522826262300372) internal successors, (121431), 105383 states have internal predecessors, (121431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105384 states to 105384 states and 121431 transitions. [2022-11-20 11:36:28,719 INFO L78 Accepts]: Start accepts. Automaton has 105384 states and 121431 transitions. Word has length 319 [2022-11-20 11:36:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:28,720 INFO L495 AbstractCegarLoop]: Abstraction has 105384 states and 121431 transitions. [2022-11-20 11:36:28,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 105384 states and 121431 transitions. [2022-11-20 11:36:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-11-20 11:36:28,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:28,802 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:28,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:36:28,803 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash 901370999, now seen corresponding path program 1 times [2022-11-20 11:36:28,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:28,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890813984] [2022-11-20 11:36:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:28,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-20 11:36:29,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890813984] [2022-11-20 11:36:29,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890813984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:29,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:29,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852816551] [2022-11-20 11:36:29,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:29,499 INFO L87 Difference]: Start difference. First operand 105384 states and 121431 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:31,536 INFO L93 Difference]: Finished difference Result 196707 states and 226115 transitions. [2022-11-20 11:36:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:31,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 323 [2022-11-20 11:36:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:31,699 INFO L225 Difference]: With dead ends: 196707 [2022-11-20 11:36:31,700 INFO L226 Difference]: Without dead ends: 112692 [2022-11-20 11:36:31,744 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:31,744 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 163 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:31,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 357 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:36:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112692 states. [2022-11-20 11:36:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112692 to 111880. [2022-11-20 11:36:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111880 states, 111879 states have (on average 1.1415010859946908) internal successors, (127710), 111879 states have internal predecessors, (127710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111880 states to 111880 states and 127710 transitions. [2022-11-20 11:36:34,173 INFO L78 Accepts]: Start accepts. Automaton has 111880 states and 127710 transitions. Word has length 323 [2022-11-20 11:36:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:34,174 INFO L495 AbstractCegarLoop]: Abstraction has 111880 states and 127710 transitions. [2022-11-20 11:36:34,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 111880 states and 127710 transitions. [2022-11-20 11:36:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-20 11:36:34,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:34,273 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:34,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:36:34,273 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:34,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1063126104, now seen corresponding path program 1 times [2022-11-20 11:36:34,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:34,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404443434] [2022-11-20 11:36:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:34,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-20 11:36:35,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:35,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404443434] [2022-11-20 11:36:35,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404443434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:35,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:35,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:36:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768570668] [2022-11-20 11:36:35,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:35,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:35,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:35,720 INFO L87 Difference]: Start difference. First operand 111880 states and 127710 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:38,167 INFO L93 Difference]: Finished difference Result 228832 states and 260859 transitions. [2022-11-20 11:36:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 330 [2022-11-20 11:36:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:38,378 INFO L225 Difference]: With dead ends: 228832 [2022-11-20 11:36:38,378 INFO L226 Difference]: Without dead ends: 138321 [2022-11-20 11:36:38,425 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:38,426 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 218 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:38,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 134 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:36:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138321 states. [2022-11-20 11:36:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138321 to 138316. [2022-11-20 11:36:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138316 states, 138315 states have (on average 1.1416043090048078) internal successors, (157901), 138315 states have internal predecessors, (157901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138316 states to 138316 states and 157901 transitions. [2022-11-20 11:36:41,125 INFO L78 Accepts]: Start accepts. Automaton has 138316 states and 157901 transitions. Word has length 330 [2022-11-20 11:36:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:41,126 INFO L495 AbstractCegarLoop]: Abstraction has 138316 states and 157901 transitions. [2022-11-20 11:36:41,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 138316 states and 157901 transitions. [2022-11-20 11:36:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-11-20 11:36:41,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:41,211 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:41,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:36:41,211 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash 178796709, now seen corresponding path program 1 times [2022-11-20 11:36:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:41,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349112951] [2022-11-20 11:36:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:41,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-20 11:36:41,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:41,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349112951] [2022-11-20 11:36:41,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349112951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:41,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:41,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:41,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548670316] [2022-11-20 11:36:41,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:41,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:36:41,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:36:41,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:36:41,942 INFO L87 Difference]: Start difference. First operand 138316 states and 157901 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:44,872 INFO L93 Difference]: Finished difference Result 228942 states and 261013 transitions. [2022-11-20 11:36:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:36:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 [2022-11-20 11:36:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:45,053 INFO L225 Difference]: With dead ends: 228942 [2022-11-20 11:36:45,053 INFO L226 Difference]: Without dead ends: 138431 [2022-11-20 11:36:45,102 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:36:45,103 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 387 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:45,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 78 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 11:36:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138431 states. [2022-11-20 11:36:47,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138431 to 136895. [2022-11-20 11:36:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136895 states, 136894 states have (on average 1.1424678948675617) internal successors, (156397), 136894 states have internal predecessors, (156397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136895 states to 136895 states and 156397 transitions. [2022-11-20 11:36:47,915 INFO L78 Accepts]: Start accepts. Automaton has 136895 states and 156397 transitions. Word has length 338 [2022-11-20 11:36:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:47,915 INFO L495 AbstractCegarLoop]: Abstraction has 136895 states and 156397 transitions. [2022-11-20 11:36:47,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 136895 states and 156397 transitions. [2022-11-20 11:36:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-20 11:36:47,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:47,973 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:47,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:36:47,973 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:47,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1666657648, now seen corresponding path program 1 times [2022-11-20 11:36:47,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:47,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290304222] [2022-11-20 11:36:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:47,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 129 proven. 6 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 11:36:48,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:48,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290304222] [2022-11-20 11:36:48,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290304222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:48,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645403558] [2022-11-20 11:36:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:48,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:48,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:48,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:48,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:36:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:49,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:36:49,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-20 11:36:49,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:36:49,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645403558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:49,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:36:49,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 11:36:49,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769147560] [2022-11-20 11:36:49,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:49,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:49,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:49,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:49,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:36:49,564 INFO L87 Difference]: Start difference. First operand 136895 states and 156397 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:52,010 INFO L93 Difference]: Finished difference Result 297131 states and 339473 transitions. [2022-11-20 11:36:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:52,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 345 [2022-11-20 11:36:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:52,918 INFO L225 Difference]: With dead ends: 297131 [2022-11-20 11:36:52,918 INFO L226 Difference]: Without dead ends: 160441 [2022-11-20 11:36:52,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:36:52,956 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 238 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:52,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 128 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:36:53,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160441 states. [2022-11-20 11:36:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160441 to 159827. [2022-11-20 11:36:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159827 states, 159826 states have (on average 1.1344336966451016) internal successors, (181312), 159826 states have internal predecessors, (181312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159827 states to 159827 states and 181312 transitions. [2022-11-20 11:36:56,264 INFO L78 Accepts]: Start accepts. Automaton has 159827 states and 181312 transitions. Word has length 345 [2022-11-20 11:36:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:56,265 INFO L495 AbstractCegarLoop]: Abstraction has 159827 states and 181312 transitions. [2022-11-20 11:36:56,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 159827 states and 181312 transitions. [2022-11-20 11:36:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-11-20 11:36:56,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:56,393 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 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] [2022-11-20 11:36:56,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:56,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4085f947-8d97-49b9-a909-ba770f5afee6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:56,594 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash -290618115, now seen corresponding path program 1 times [2022-11-20 11:36:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:56,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589876170] [2022-11-20 11:36:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:56,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-20 11:36:57,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:57,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589876170] [2022-11-20 11:36:57,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589876170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:57,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:57,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050546603] [2022-11-20 11:36:57,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:57,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:36:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:57,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:36:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:36:57,150 INFO L87 Difference]: Start difference. First operand 159827 states and 181312 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:00,703 INFO L93 Difference]: Finished difference Result 348829 states and 396351 transitions. [2022-11-20 11:37:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:37:00,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 349 [2022-11-20 11:37:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:00,969 INFO L225 Difference]: With dead ends: 348829 [2022-11-20 11:37:00,969 INFO L226 Difference]: Without dead ends: 189207 [2022-11-20 11:37:01,053 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:37:01,053 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 370 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:01,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 92 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 11:37:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189207 states. [2022-11-20 11:37:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189207 to 176320. [2022-11-20 11:37:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176320 states, 176319 states have (on average 1.134455163652244) internal successors, (200026), 176319 states have internal predecessors, (200026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176320 states to 176320 states and 200026 transitions. [2022-11-20 11:37:04,728 INFO L78 Accepts]: Start accepts. Automaton has 176320 states and 200026 transitions. Word has length 349 [2022-11-20 11:37:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:04,729 INFO L495 AbstractCegarLoop]: Abstraction has 176320 states and 200026 transitions. [2022-11-20 11:37:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 176320 states and 200026 transitions. [2022-11-20 11:37:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-11-20 11:37:04,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:04,795 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 11:37:04,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:37:04,795 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash 930329166, now seen corresponding path program 1 times [2022-11-20 11:37:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:04,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81428555] [2022-11-20 11:37:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:04,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat