./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R --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 dadc4a7f56d2eeb12d7009442a875d9c494d437949017438f5005c98bfcd0bea --- 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-38b53e6 [2022-11-25 15:38:51,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:38:51,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:38:51,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:38:51,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:38:51,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:38:51,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:38:51,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:38:51,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:38:51,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:38:51,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:38:51,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:38:51,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:38:51,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:38:51,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:38:51,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:38:51,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:38:51,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:38:51,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:38:51,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:38:51,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:38:51,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:38:51,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:38:51,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:38:51,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:38:51,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:38:51,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:38:51,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:38:51,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:38:51,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:38:51,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:38:51,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:38:51,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:38:51,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:38:51,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:38:51,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:38:51,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:38:51,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:38:51,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:38:51,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:38:51,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:38:51,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:38:51,431 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:38:51,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:38:51,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:38:51,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:38:51,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:38:51,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:38:51,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:38:51,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:38:51,442 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:38:51,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:38:51,444 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:38:51,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:38:51,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:38:51,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:38:51,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:38:51,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:38:51,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:38:51,446 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:38:51,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:38:51,446 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:38:51,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:38:51,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:38:51,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:38:51,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:38:51,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:38:51,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:38:51,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:38:51,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:38:51,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:38:51,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:38:51,450 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:38:51,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:38:51,451 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:38:51,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:38:51,452 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dadc4a7f56d2eeb12d7009442a875d9c494d437949017438f5005c98bfcd0bea [2022-11-25 15:38:51,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:38:51,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:38:51,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:38:51,828 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:38:51,828 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:38:51,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/eca-rers2012/Problem03_label52.c [2022-11-25 15:38:55,446 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:38:55,940 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:38:55,941 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/sv-benchmarks/c/eca-rers2012/Problem03_label52.c [2022-11-25 15:38:55,959 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/data/2c0208be4/3c74c55ffde84146836a1dd31673c887/FLAG8273a2dcb [2022-11-25 15:38:55,976 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/data/2c0208be4/3c74c55ffde84146836a1dd31673c887 [2022-11-25 15:38:55,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:38:55,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:38:55,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:38:55,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:38:55,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:38:55,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:38:55" (1/1) ... [2022-11-25 15:38:55,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa77d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:55, skipping insertion in model container [2022-11-25 15:38:55,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:38:55" (1/1) ... [2022-11-25 15:38:55,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:38:56,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:38:56,832 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_adcc74d7-b631-4925-bc6d-20805d81f0d5/sv-benchmarks/c/eca-rers2012/Problem03_label52.c[53923,53936] [2022-11-25 15:38:56,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:38:56,910 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:38:57,439 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_adcc74d7-b631-4925-bc6d-20805d81f0d5/sv-benchmarks/c/eca-rers2012/Problem03_label52.c[53923,53936] [2022-11-25 15:38:57,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:38:57,483 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:38:57,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57 WrapperNode [2022-11-25 15:38:57,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:38:57,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:38:57,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:38:57,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:38:57,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,664 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-25 15:38:57,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:38:57,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:38:57,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:38:57,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:38:57,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,775 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:38:57,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:38:57,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:38:57,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:38:57,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (1/1) ... [2022-11-25 15:38:57,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:38:57,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:57,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:38:57,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:38:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:38:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:38:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:38:57,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:38:58,041 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:38:58,043 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:39:00,671 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:39:00,698 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:39:00,709 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 15:39:00,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:39:00 BoogieIcfgContainer [2022-11-25 15:39:00,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:39:00,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:39:00,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:39:00,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:39:00,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:38:55" (1/3) ... [2022-11-25 15:39:00,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a186fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:39:00, skipping insertion in model container [2022-11-25 15:39:00,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:38:57" (2/3) ... [2022-11-25 15:39:00,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a186fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:39:00, skipping insertion in model container [2022-11-25 15:39:00,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:39:00" (3/3) ... [2022-11-25 15:39:00,727 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label52.c [2022-11-25 15:39:00,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:39:00,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:39:00,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:39:00,838 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;@4211d658, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:39:00,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:39:00,850 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) [2022-11-25 15:39:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-25 15:39:00,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:00,880 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, 1, 1] [2022-11-25 15:39:00,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:00,891 INFO L85 PathProgramCache]: Analyzing trace with hash 657543978, now seen corresponding path program 1 times [2022-11-25 15:39:00,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:00,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766365475] [2022-11-25 15:39:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:02,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766365475] [2022-11-25 15:39:02,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766365475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:02,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:02,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041492902] [2022-11-25 15:39:02,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:02,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:02,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:02,130 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 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:03,447 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2022-11-25 15:39:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2022-11-25 15:39:03,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:03,466 INFO L225 Difference]: With dead ends: 836 [2022-11-25 15:39:03,466 INFO L226 Difference]: Without dead ends: 457 [2022-11-25 15:39:03,470 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 [2022-11-25 15:39:03,473 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 137 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:03,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 15:39:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-25 15:39:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2022-11-25 15:39:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2022-11-25 15:39:03,556 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 146 [2022-11-25 15:39:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:03,557 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2022-11-25 15:39:03,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2022-11-25 15:39:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-25 15:39:03,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:03,563 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, 1, 1] [2022-11-25 15:39:03,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:39:03,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1498849718, now seen corresponding path program 1 times [2022-11-25 15:39:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:03,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128847997] [2022-11-25 15:39:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:03,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:04,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128847997] [2022-11-25 15:39:04,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128847997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:04,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:04,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:04,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761459943] [2022-11-25 15:39:04,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:04,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:04,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:04,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:04,113 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:05,403 INFO L93 Difference]: Finished difference Result 1340 states and 2142 transitions. [2022-11-25 15:39:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-11-25 15:39:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:05,410 INFO L225 Difference]: With dead ends: 1340 [2022-11-25 15:39:05,410 INFO L226 Difference]: Without dead ends: 891 [2022-11-25 15:39:05,412 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 [2022-11-25 15:39:05,420 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:05,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 141 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 15:39:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-25 15:39:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2022-11-25 15:39:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5785310734463276) internal successors, (1397), 885 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1397 transitions. [2022-11-25 15:39:05,504 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1397 transitions. Word has length 152 [2022-11-25 15:39:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:05,504 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1397 transitions. [2022-11-25 15:39:05,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1397 transitions. [2022-11-25 15:39:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-25 15:39:05,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:05,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:05,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:39:05,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:05,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1725054596, now seen corresponding path program 1 times [2022-11-25 15:39:05,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:05,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333742457] [2022-11-25 15:39:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:05,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:05,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:05,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333742457] [2022-11-25 15:39:05,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333742457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:05,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:05,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:05,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058869647] [2022-11-25 15:39:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:05,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:05,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:05,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:05,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:05,991 INFO L87 Difference]: Start difference. First operand 886 states and 1397 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) [2022-11-25 15:39:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:07,149 INFO L93 Difference]: Finished difference Result 2605 states and 4115 transitions. [2022-11-25 15:39:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:07,151 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 [2022-11-25 15:39:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:07,159 INFO L225 Difference]: With dead ends: 2605 [2022-11-25 15:39:07,159 INFO L226 Difference]: Without dead ends: 1721 [2022-11-25 15:39:07,163 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 [2022-11-25 15:39:07,165 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 234 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:07,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 124 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 15:39:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-11-25 15:39:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2022-11-25 15:39:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5017462165308497) internal successors, (2580), 1718 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2580 transitions. [2022-11-25 15:39:07,223 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2580 transitions. Word has length 156 [2022-11-25 15:39:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:07,224 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2580 transitions. [2022-11-25 15:39:07,224 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) [2022-11-25 15:39:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2580 transitions. [2022-11-25 15:39:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-25 15:39:07,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:07,232 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, 1, 1] [2022-11-25 15:39:07,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:39:07,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1870294529, now seen corresponding path program 1 times [2022-11-25 15:39:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:07,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981681294] [2022-11-25 15:39:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:07,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:07,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981681294] [2022-11-25 15:39:07,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981681294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:07,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:07,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32825867] [2022-11-25 15:39:07,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:07,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:07,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:07,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:07,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:07,741 INFO L87 Difference]: Start difference. First operand 1719 states and 2580 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:09,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:09,041 INFO L93 Difference]: Finished difference Result 5126 states and 7705 transitions. [2022-11-25 15:39:09,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:09,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 [2022-11-25 15:39:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:09,055 INFO L225 Difference]: With dead ends: 5126 [2022-11-25 15:39:09,055 INFO L226 Difference]: Without dead ends: 3409 [2022-11-25 15:39:09,058 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 [2022-11-25 15:39:09,060 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:09,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 181 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 15:39:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2022-11-25 15:39:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3397. [2022-11-25 15:39:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 1.4840989399293287) internal successors, (5040), 3396 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5040 transitions. [2022-11-25 15:39:09,149 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5040 transitions. Word has length 158 [2022-11-25 15:39:09,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:09,149 INFO L495 AbstractCegarLoop]: Abstraction has 3397 states and 5040 transitions. [2022-11-25 15:39:09,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5040 transitions. [2022-11-25 15:39:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-25 15:39:09,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:09,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:09,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:39:09,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash -807364230, now seen corresponding path program 1 times [2022-11-25 15:39:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:09,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769643729] [2022-11-25 15:39:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:09,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:09,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:09,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769643729] [2022-11-25 15:39:09,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769643729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:09,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:09,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:09,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741998896] [2022-11-25 15:39:09,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:09,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:09,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:09,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:09,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:09,407 INFO L87 Difference]: Start difference. First operand 3397 states and 5040 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:10,488 INFO L93 Difference]: Finished difference Result 10087 states and 14974 transitions. [2022-11-25 15:39:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:10,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2022-11-25 15:39:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:10,516 INFO L225 Difference]: With dead ends: 10087 [2022-11-25 15:39:10,516 INFO L226 Difference]: Without dead ends: 6692 [2022-11-25 15:39:10,522 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 [2022-11-25 15:39:10,526 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 240 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:10,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 152 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 15:39:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6692 states. [2022-11-25 15:39:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6692 to 6687. [2022-11-25 15:39:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6687 states, 6686 states have (on average 1.4119054741250374) internal successors, (9440), 6686 states have internal predecessors, (9440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 9440 transitions. [2022-11-25 15:39:10,807 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 9440 transitions. Word has length 160 [2022-11-25 15:39:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:10,809 INFO L495 AbstractCegarLoop]: Abstraction has 6687 states and 9440 transitions. [2022-11-25 15:39:10,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 9440 transitions. [2022-11-25 15:39:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-25 15:39:10,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:10,828 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:10,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:39:10,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1453208832, now seen corresponding path program 1 times [2022-11-25 15:39:10,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:10,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006354519] [2022-11-25 15:39:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:10,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:39:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:11,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006354519] [2022-11-25 15:39:11,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006354519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:11,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:11,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:39:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127269116] [2022-11-25 15:39:11,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:11,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:11,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:11,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:11,230 INFO L87 Difference]: Start difference. First operand 6687 states and 9440 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:12,622 INFO L93 Difference]: Finished difference Result 19503 states and 27570 transitions. [2022-11-25 15:39:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 167 [2022-11-25 15:39:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:12,671 INFO L225 Difference]: With dead ends: 19503 [2022-11-25 15:39:12,671 INFO L226 Difference]: Without dead ends: 12818 [2022-11-25 15:39:12,679 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 [2022-11-25 15:39:12,680 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:12,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 395 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 15:39:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12818 states. [2022-11-25 15:39:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12818 to 12808. [2022-11-25 15:39:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12808 states, 12807 states have (on average 1.3145935816350434) internal successors, (16836), 12807 states have internal predecessors, (16836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12808 states to 12808 states and 16836 transitions. [2022-11-25 15:39:12,966 INFO L78 Accepts]: Start accepts. Automaton has 12808 states and 16836 transitions. Word has length 167 [2022-11-25 15:39:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:12,966 INFO L495 AbstractCegarLoop]: Abstraction has 12808 states and 16836 transitions. [2022-11-25 15:39:12,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 12808 states and 16836 transitions. [2022-11-25 15:39:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-25 15:39:12,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:12,984 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:12,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:39:12,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash 343754573, now seen corresponding path program 1 times [2022-11-25 15:39:12,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:12,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310194854] [2022-11-25 15:39:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:13,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:13,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310194854] [2022-11-25 15:39:13,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310194854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:13,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:13,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:13,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067298679] [2022-11-25 15:39:13,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:13,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:13,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:13,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:13,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:13,392 INFO L87 Difference]: Start difference. First operand 12808 states and 16836 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:14,776 INFO L93 Difference]: Finished difference Result 38319 states and 50383 transitions. [2022-11-25 15:39:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:14,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 169 [2022-11-25 15:39:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:14,854 INFO L225 Difference]: With dead ends: 38319 [2022-11-25 15:39:14,854 INFO L226 Difference]: Without dead ends: 25513 [2022-11-25 15:39:14,874 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 [2022-11-25 15:39:14,878 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:14,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 129 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 15:39:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25513 states. [2022-11-25 15:39:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25513 to 25453. [2022-11-25 15:39:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25453 states, 25452 states have (on average 1.3042197076850541) internal successors, (33195), 25452 states have internal predecessors, (33195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25453 states to 25453 states and 33195 transitions. [2022-11-25 15:39:15,538 INFO L78 Accepts]: Start accepts. Automaton has 25453 states and 33195 transitions. Word has length 169 [2022-11-25 15:39:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:15,540 INFO L495 AbstractCegarLoop]: Abstraction has 25453 states and 33195 transitions. [2022-11-25 15:39:15,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 25453 states and 33195 transitions. [2022-11-25 15:39:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-25 15:39:15,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:15,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:15,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:39:15,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:15,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1405156533, now seen corresponding path program 1 times [2022-11-25 15:39:15,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:15,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869456246] [2022-11-25 15:39:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:15,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:15,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869456246] [2022-11-25 15:39:15,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869456246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:15,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:15,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685794349] [2022-11-25 15:39:15,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:15,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:15,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:15,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:15,984 INFO L87 Difference]: Start difference. First operand 25453 states and 33195 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:17,680 INFO L93 Difference]: Finished difference Result 63394 states and 83978 transitions. [2022-11-25 15:39:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:17,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 [2022-11-25 15:39:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:17,979 INFO L225 Difference]: With dead ends: 63394 [2022-11-25 15:39:17,986 INFO L226 Difference]: Without dead ends: 37943 [2022-11-25 15:39:18,050 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 [2022-11-25 15:39:18,058 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 219 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:18,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 204 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 15:39:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37943 states. [2022-11-25 15:39:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37943 to 37861. [2022-11-25 15:39:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37861 states, 37860 states have (on average 1.3260433174854729) internal successors, (50204), 37860 states have internal predecessors, (50204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37861 states to 37861 states and 50204 transitions. [2022-11-25 15:39:19,219 INFO L78 Accepts]: Start accepts. Automaton has 37861 states and 50204 transitions. Word has length 172 [2022-11-25 15:39:19,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:19,221 INFO L495 AbstractCegarLoop]: Abstraction has 37861 states and 50204 transitions. [2022-11-25 15:39:19,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 37861 states and 50204 transitions. [2022-11-25 15:39:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-25 15:39:19,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:19,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:19,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:39:19,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:19,435 INFO L85 PathProgramCache]: Analyzing trace with hash 621189392, now seen corresponding path program 1 times [2022-11-25 15:39:19,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:19,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932675246] [2022-11-25 15:39:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:19,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:19,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932675246] [2022-11-25 15:39:19,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932675246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:19,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:19,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:19,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127654711] [2022-11-25 15:39:19,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:19,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:19,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:19,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:19,977 INFO L87 Difference]: Start difference. First operand 37861 states and 50204 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:21,744 INFO L93 Difference]: Finished difference Result 94121 states and 124154 transitions. [2022-11-25 15:39:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:21,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 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 174 [2022-11-25 15:39:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:21,907 INFO L225 Difference]: With dead ends: 94121 [2022-11-25 15:39:21,908 INFO L226 Difference]: Without dead ends: 56262 [2022-11-25 15:39:21,946 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 [2022-11-25 15:39:21,949 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 216 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:21,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 158 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 15:39:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56262 states. [2022-11-25 15:39:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56262 to 56205. [2022-11-25 15:39:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56205 states, 56204 states have (on average 1.3104761226958936) internal successors, (73654), 56204 states have internal predecessors, (73654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56205 states to 56205 states and 73654 transitions. [2022-11-25 15:39:23,326 INFO L78 Accepts]: Start accepts. Automaton has 56205 states and 73654 transitions. Word has length 174 [2022-11-25 15:39:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:23,327 INFO L495 AbstractCegarLoop]: Abstraction has 56205 states and 73654 transitions. [2022-11-25 15:39:23,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 56205 states and 73654 transitions. [2022-11-25 15:39:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-25 15:39:23,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:23,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:23,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:39:23,389 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1887777131, now seen corresponding path program 1 times [2022-11-25 15:39:23,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:23,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484287216] [2022-11-25 15:39:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:23,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:23,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:23,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484287216] [2022-11-25 15:39:23,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484287216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:23,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:23,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:23,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517197733] [2022-11-25 15:39:23,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:23,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:23,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:23,977 INFO L87 Difference]: Start difference. First operand 56205 states and 73654 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) [2022-11-25 15:39:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:25,873 INFO L93 Difference]: Finished difference Result 133673 states and 176288 transitions. [2022-11-25 15:39:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:25,874 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 176 [2022-11-25 15:39:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:26,005 INFO L225 Difference]: With dead ends: 133673 [2022-11-25 15:39:26,006 INFO L226 Difference]: Without dead ends: 77470 [2022-11-25 15:39:26,033 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 [2022-11-25 15:39:26,034 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:26,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 200 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 15:39:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77470 states. [2022-11-25 15:39:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77470 to 77369. [2022-11-25 15:39:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77369 states, 77368 states have (on average 1.3209078688863614) internal successors, (102196), 77368 states have internal predecessors, (102196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77369 states to 77369 states and 102196 transitions. [2022-11-25 15:39:27,752 INFO L78 Accepts]: Start accepts. Automaton has 77369 states and 102196 transitions. Word has length 176 [2022-11-25 15:39:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:27,752 INFO L495 AbstractCegarLoop]: Abstraction has 77369 states and 102196 transitions. [2022-11-25 15:39:27,752 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) [2022-11-25 15:39:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 77369 states and 102196 transitions. [2022-11-25 15:39:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-25 15:39:27,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:27,797 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:27,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 15:39:27,798 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash -49719774, now seen corresponding path program 1 times [2022-11-25 15:39:27,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:27,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393682547] [2022-11-25 15:39:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:27,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 15:39:28,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:28,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393682547] [2022-11-25 15:39:28,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393682547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:28,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:28,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:28,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826596498] [2022-11-25 15:39:28,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:28,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:28,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:28,740 INFO L87 Difference]: Start difference. First operand 77369 states and 102196 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:31,016 INFO L93 Difference]: Finished difference Result 182216 states and 240238 transitions. [2022-11-25 15:39:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 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 191 [2022-11-25 15:39:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:31,219 INFO L225 Difference]: With dead ends: 182216 [2022-11-25 15:39:31,220 INFO L226 Difference]: Without dead ends: 104849 [2022-11-25 15:39:31,262 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 [2022-11-25 15:39:31,263 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 206 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:31,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 187 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 15:39:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104849 states. [2022-11-25 15:39:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104849 to 104774. [2022-11-25 15:39:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104774 states, 104773 states have (on average 1.2897693107957202) internal successors, (135133), 104773 states have internal predecessors, (135133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104774 states to 104774 states and 135133 transitions. [2022-11-25 15:39:33,965 INFO L78 Accepts]: Start accepts. Automaton has 104774 states and 135133 transitions. Word has length 191 [2022-11-25 15:39:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:33,965 INFO L495 AbstractCegarLoop]: Abstraction has 104774 states and 135133 transitions. [2022-11-25 15:39:33,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 104774 states and 135133 transitions. [2022-11-25 15:39:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-25 15:39:34,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:34,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:34,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 15:39:34,030 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:34,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1722100201, now seen corresponding path program 1 times [2022-11-25 15:39:34,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:34,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388431199] [2022-11-25 15:39:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 15:39:34,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388431199] [2022-11-25 15:39:34,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388431199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:34,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094719513] [2022-11-25 15:39:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:34,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:34,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:34,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:34,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:39:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:34,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 15:39:34,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 15:39:35,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:39:35,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094719513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:35,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:39:35,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-25 15:39:35,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408120692] [2022-11-25 15:39:35,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:35,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:35,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:35,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:35,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:39:35,140 INFO L87 Difference]: Start difference. First operand 104774 states and 135133 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:37,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:37,752 INFO L93 Difference]: Finished difference Result 273874 states and 355241 transitions. [2022-11-25 15:39:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 198 [2022-11-25 15:39:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:38,486 INFO L225 Difference]: With dead ends: 273874 [2022-11-25 15:39:38,486 INFO L226 Difference]: Without dead ends: 169914 [2022-11-25 15:39:38,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:39:38,575 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 235 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:38,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 165 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 15:39:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169914 states. [2022-11-25 15:39:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169914 to 169904. [2022-11-25 15:39:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169904 states, 169903 states have (on average 1.2758515152763636) internal successors, (216771), 169903 states have internal predecessors, (216771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169904 states to 169904 states and 216771 transitions. [2022-11-25 15:39:41,392 INFO L78 Accepts]: Start accepts. Automaton has 169904 states and 216771 transitions. Word has length 198 [2022-11-25 15:39:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:41,392 INFO L495 AbstractCegarLoop]: Abstraction has 169904 states and 216771 transitions. [2022-11-25 15:39:41,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 169904 states and 216771 transitions. [2022-11-25 15:39:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-25 15:39:41,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:41,451 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 15:39:41,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:41,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 15:39:41,658 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:41,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1804575218, now seen corresponding path program 1 times [2022-11-25 15:39:41,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:41,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229551271] [2022-11-25 15:39:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:41,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 15:39:42,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:42,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229551271] [2022-11-25 15:39:42,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229551271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:42,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948609223] [2022-11-25 15:39:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:42,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:42,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:42,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:42,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:39:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 15:39:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 15:39:43,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:39:43,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948609223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:43,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:39:43,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-25 15:39:43,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097386393] [2022-11-25 15:39:43,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:43,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:43,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:43,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:39:43,053 INFO L87 Difference]: Start difference. First operand 169904 states and 216771 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:45,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:45,593 INFO L93 Difference]: Finished difference Result 353531 states and 455087 transitions. [2022-11-25 15:39:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:45,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 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 [2022-11-25 15:39:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:45,791 INFO L225 Difference]: With dead ends: 353531 [2022-11-25 15:39:45,791 INFO L226 Difference]: Without dead ends: 184035 [2022-11-25 15:39:45,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:39:45,841 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 223 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:45,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 15:39:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184035 states. [2022-11-25 15:39:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184035 to 184028. [2022-11-25 15:39:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184028 states, 184027 states have (on average 1.188488645687861) internal successors, (218714), 184027 states have internal predecessors, (218714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184028 states to 184028 states and 218714 transitions. [2022-11-25 15:39:49,059 INFO L78 Accepts]: Start accepts. Automaton has 184028 states and 218714 transitions. Word has length 200 [2022-11-25 15:39:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:49,060 INFO L495 AbstractCegarLoop]: Abstraction has 184028 states and 218714 transitions. [2022-11-25 15:39:49,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 184028 states and 218714 transitions. [2022-11-25 15:39:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-25 15:39:49,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:49,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:49,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:49,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:49,314 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:49,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:49,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1583682439, now seen corresponding path program 1 times [2022-11-25 15:39:49,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:49,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981716782] [2022-11-25 15:39:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:49,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 15:39:50,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:50,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981716782] [2022-11-25 15:39:50,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981716782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:50,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:50,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970240956] [2022-11-25 15:39:50,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:50,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:50,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:50,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:50,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:39:50,533 INFO L87 Difference]: Start difference. First operand 184028 states and 218714 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:53,305 INFO L93 Difference]: Finished difference Result 432186 states and 513592 transitions. [2022-11-25 15:39:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:39:53,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 208 [2022-11-25 15:39:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:53,642 INFO L225 Difference]: With dead ends: 432186 [2022-11-25 15:39:53,642 INFO L226 Difference]: Without dead ends: 256289 [2022-11-25 15:39:53,710 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 [2022-11-25 15:39:53,710 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:53,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 216 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 15:39:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256289 states. [2022-11-25 15:39:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256289 to 256257. [2022-11-25 15:39:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256257 states, 256256 states have (on average 1.1862863698801198) internal successors, (303993), 256256 states have internal predecessors, (303993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256257 states to 256257 states and 303993 transitions. [2022-11-25 15:39:58,178 INFO L78 Accepts]: Start accepts. Automaton has 256257 states and 303993 transitions. Word has length 208 [2022-11-25 15:39:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:58,178 INFO L495 AbstractCegarLoop]: Abstraction has 256257 states and 303993 transitions. [2022-11-25 15:39:58,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 256257 states and 303993 transitions. [2022-11-25 15:39:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-25 15:39:58,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:58,910 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:58,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 15:39:58,911 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash 332190866, now seen corresponding path program 1 times [2022-11-25 15:39:58,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:58,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689788585] [2022-11-25 15:39:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 15:39:59,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:59,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689788585] [2022-11-25 15:39:59,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689788585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:59,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279607549] [2022-11-25 15:39:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:59,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:59,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:59,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:59,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adcc74d7-b631-4925-bc6d-20805d81f0d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:39:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:59,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 15:39:59,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:39:59,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:39:59,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279607549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:59,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:39:59,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 15:39:59,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489693878] [2022-11-25 15:39:59,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:59,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:39:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:39:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:39:59,959 INFO L87 Difference]: Start difference. First operand 256257 states and 303993 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) [2022-11-25 15:40:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:40:03,252 INFO L93 Difference]: Finished difference Result 532979 states and 630832 transitions. [2022-11-25 15:40:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:40:03,253 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 214 [2022-11-25 15:40:03,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted.