./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a --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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- 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-b5237d8 [2022-11-21 16:28:36,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:28:36,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:28:36,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:28:36,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:28:36,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:28:36,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:28:36,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:28:36,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:28:36,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:28:36,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:28:36,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:28:36,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:28:36,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:28:36,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:28:36,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:28:36,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:28:36,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:28:36,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:28:36,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:28:36,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:28:36,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:28:36,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:28:36,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:28:36,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:28:36,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:28:36,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:28:36,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:28:36,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:28:36,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:28:36,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:28:36,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:28:37,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:28:37,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:28:37,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:28:37,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:28:37,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:28:37,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:28:37,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:28:37,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:28:37,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:28:37,016 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:28:37,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:28:37,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:28:37,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:28:37,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:28:37,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:28:37,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:28:37,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:28:37,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:28:37,069 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:28:37,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:28:37,071 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:28:37,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:28:37,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:28:37,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:28:37,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:28:37,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:28:37,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:28:37,073 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:28:37,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:28:37,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:28:37,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:28:37,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:28:37,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:28:37,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:28:37,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:28:37,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:28:37,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:28:37,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:28:37,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:28:37,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:28:37,077 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:28:37,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:28:37,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:28:37,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-11-21 16:28:37,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:28:37,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:28:37,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:28:37,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:28:37,453 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:28:37,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-11-21 16:28:40,759 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:28:40,990 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:28:40,990 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-11-21 16:28:40,999 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/data/cefe2d8f3/2965ec6f0a6443068a47bb0d80bab6b9/FLAG0eb56d478 [2022-11-21 16:28:41,016 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/data/cefe2d8f3/2965ec6f0a6443068a47bb0d80bab6b9 [2022-11-21 16:28:41,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:28:41,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:28:41,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:28:41,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:28:41,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:28:41,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1942f1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41, skipping insertion in model container [2022-11-21 16:28:41,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:28:41,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:28:41,255 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_42ec5f68-4bbb-444f-8954-901c2772ac63/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-11-21 16:28:41,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:28:41,406 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:28:41,420 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_42ec5f68-4bbb-444f-8954-901c2772ac63/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-11-21 16:28:41,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:28:41,504 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:28:41,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41 WrapperNode [2022-11-21 16:28:41,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:28:41,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:28:41,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:28:41,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:28:41,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,558 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 201 [2022-11-21 16:28:41,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:28:41,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:28:41,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:28:41,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:28:41,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,620 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:28:41,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:28:41,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:28:41,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:28:41,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (1/1) ... [2022-11-21 16:28:41,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:28:41,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:41,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:28:41,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:28:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:28:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:28:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-21 16:28:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-21 16:28:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:28:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:28:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 16:28:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 16:28:41,870 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:28:41,876 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:28:42,528 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:28:42,537 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:28:42,537 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 16:28:42,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:28:42 BoogieIcfgContainer [2022-11-21 16:28:42,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:28:42,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:28:42,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:28:42,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:28:42,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:28:41" (1/3) ... [2022-11-21 16:28:42,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa58b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:28:42, skipping insertion in model container [2022-11-21 16:28:42,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:41" (2/3) ... [2022-11-21 16:28:42,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa58b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:28:42, skipping insertion in model container [2022-11-21 16:28:42,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:28:42" (3/3) ... [2022-11-21 16:28:42,551 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-11-21 16:28:42,574 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:28:42,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:28:42,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:28:42,641 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;@69eec812, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:28:42,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:28:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 16:28:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 16:28:42,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:42,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:42,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash 906811198, now seen corresponding path program 1 times [2022-11-21 16:28:42,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:42,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723191741] [2022-11-21 16:28:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:43,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:43,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:43,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:43,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723191741] [2022-11-21 16:28:43,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723191741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:43,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:43,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:28:43,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723635120] [2022-11-21 16:28:43,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:43,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:28:43,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:28:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:28:43,128 INFO L87 Difference]: Start difference. First operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:43,232 INFO L93 Difference]: Finished difference Result 235 states and 390 transitions. [2022-11-21 16:28:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:28:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-21 16:28:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:43,245 INFO L225 Difference]: With dead ends: 235 [2022-11-21 16:28:43,245 INFO L226 Difference]: Without dead ends: 136 [2022-11-21 16:28:43,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:28:43,253 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 63 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:43,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-21 16:28:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2022-11-21 16:28:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 111 states have (on average 1.5405405405405406) internal successors, (171), 113 states have internal predecessors, (171), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-21 16:28:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 194 transitions. [2022-11-21 16:28:43,315 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 194 transitions. Word has length 37 [2022-11-21 16:28:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:43,317 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 194 transitions. [2022-11-21 16:28:43,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:43,318 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 194 transitions. [2022-11-21 16:28:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:28:43,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:43,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:43,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:28:43,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash 804838827, now seen corresponding path program 1 times [2022-11-21 16:28:43,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:43,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85200641] [2022-11-21 16:28:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:43,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:43,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:43,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:43,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:43,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85200641] [2022-11-21 16:28:43,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85200641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:43,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:43,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:28:43,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134577537] [2022-11-21 16:28:43,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:43,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:28:43,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:28:43,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:28:43,596 INFO L87 Difference]: Start difference. First operand 126 states and 194 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:43,678 INFO L93 Difference]: Finished difference Result 228 states and 353 transitions. [2022-11-21 16:28:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:28:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-21 16:28:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:43,682 INFO L225 Difference]: With dead ends: 228 [2022-11-21 16:28:43,683 INFO L226 Difference]: Without dead ends: 192 [2022-11-21 16:28:43,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:28:43,689 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 55 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:43,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 272 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-21 16:28:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2022-11-21 16:28:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.5185185185185186) internal successors, (246), 165 states have internal predecessors, (246), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-21 16:28:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 280 transitions. [2022-11-21 16:28:43,737 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 280 transitions. Word has length 39 [2022-11-21 16:28:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:43,738 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 280 transitions. [2022-11-21 16:28:43,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 280 transitions. [2022-11-21 16:28:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:28:43,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:43,741 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:43,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:28:43,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:43,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1821406099, now seen corresponding path program 1 times [2022-11-21 16:28:43,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:43,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508360292] [2022-11-21 16:28:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:43,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:44,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:44,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:44,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508360292] [2022-11-21 16:28:44,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508360292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:44,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080125168] [2022-11-21 16:28:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:44,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:44,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:44,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:44,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:28:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:28:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:28:44,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:44,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080125168] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:44,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:28:44,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 12 [2022-11-21 16:28:44,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757379152] [2022-11-21 16:28:44,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:44,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:28:44,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:44,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:28:44,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:28:44,574 INFO L87 Difference]: Start difference. First operand 183 states and 280 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:44,653 INFO L93 Difference]: Finished difference Result 319 states and 484 transitions. [2022-11-21 16:28:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:28:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-21 16:28:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:44,659 INFO L225 Difference]: With dead ends: 319 [2022-11-21 16:28:44,660 INFO L226 Difference]: Without dead ends: 215 [2022-11-21 16:28:44,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:28:44,663 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 64 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:44,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-21 16:28:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 183. [2022-11-21 16:28:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.4938271604938271) internal successors, (242), 165 states have internal predecessors, (242), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-21 16:28:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 276 transitions. [2022-11-21 16:28:44,704 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 276 transitions. Word has length 40 [2022-11-21 16:28:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:44,705 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 276 transitions. [2022-11-21 16:28:44,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 276 transitions. [2022-11-21 16:28:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:28:44,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:44,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:44,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:44,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:44,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash -363711082, now seen corresponding path program 1 times [2022-11-21 16:28:44,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:44,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111877558] [2022-11-21 16:28:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:44,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:45,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:45,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111877558] [2022-11-21 16:28:45,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111877558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:45,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:45,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:28:45,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441832254] [2022-11-21 16:28:45,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:45,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:28:45,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:28:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:28:45,089 INFO L87 Difference]: Start difference. First operand 183 states and 276 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:45,197 INFO L93 Difference]: Finished difference Result 291 states and 442 transitions. [2022-11-21 16:28:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:28:45,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-21 16:28:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:45,200 INFO L225 Difference]: With dead ends: 291 [2022-11-21 16:28:45,201 INFO L226 Difference]: Without dead ends: 262 [2022-11-21 16:28:45,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:28:45,203 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 147 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:45,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 477 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:28:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-21 16:28:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 228. [2022-11-21 16:28:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 202 states have (on average 1.5) internal successors, (303), 206 states have internal predecessors, (303), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-21 16:28:45,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 347 transitions. [2022-11-21 16:28:45,226 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 347 transitions. Word has length 40 [2022-11-21 16:28:45,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:45,227 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 347 transitions. [2022-11-21 16:28:45,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 347 transitions. [2022-11-21 16:28:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:28:45,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:45,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:45,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:28:45,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1384779436, now seen corresponding path program 1 times [2022-11-21 16:28:45,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:45,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485636267] [2022-11-21 16:28:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:45,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485636267] [2022-11-21 16:28:45,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485636267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:45,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:45,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:28:45,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430999407] [2022-11-21 16:28:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:45,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:28:45,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:28:45,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:28:45,326 INFO L87 Difference]: Start difference. First operand 228 states and 347 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:45,346 INFO L93 Difference]: Finished difference Result 241 states and 363 transitions. [2022-11-21 16:28:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:28:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-21 16:28:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:45,350 INFO L225 Difference]: With dead ends: 241 [2022-11-21 16:28:45,350 INFO L226 Difference]: Without dead ends: 234 [2022-11-21 16:28:45,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:28:45,356 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:45,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 268 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-21 16:28:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2022-11-21 16:28:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 203 states have (on average 1.4975369458128078) internal successors, (304), 207 states have internal predecessors, (304), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-21 16:28:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2022-11-21 16:28:45,379 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 40 [2022-11-21 16:28:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:45,386 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2022-11-21 16:28:45,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2022-11-21 16:28:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-21 16:28:45,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:45,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:45,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:28:45,390 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1398619051, now seen corresponding path program 1 times [2022-11-21 16:28:45,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:45,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564134473] [2022-11-21 16:28:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:45,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:45,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564134473] [2022-11-21 16:28:45,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564134473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:45,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971892449] [2022-11-21 16:28:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:45,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:45,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:45,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:45,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:28:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:45,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:28:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:45,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971892449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:46,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:46,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-21 16:28:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710742972] [2022-11-21 16:28:46,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:46,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:28:46,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:46,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:28:46,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:28:46,099 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 16:28:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:46,599 INFO L93 Difference]: Finished difference Result 762 states and 1158 transitions. [2022-11-21 16:28:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:28:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2022-11-21 16:28:46,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:46,609 INFO L225 Difference]: With dead ends: 762 [2022-11-21 16:28:46,609 INFO L226 Difference]: Without dead ends: 576 [2022-11-21 16:28:46,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:28:46,621 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 576 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:46,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 1513 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:28:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-11-21 16:28:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 359. [2022-11-21 16:28:46,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 320 states have (on average 1.465625) internal successors, (469), 325 states have internal predecessors, (469), 35 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (37), 34 states have call predecessors, (37), 33 states have call successors, (37) [2022-11-21 16:28:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 541 transitions. [2022-11-21 16:28:46,674 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 541 transitions. Word has length 41 [2022-11-21 16:28:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:46,675 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 541 transitions. [2022-11-21 16:28:46,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 16:28:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 541 transitions. [2022-11-21 16:28:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-21 16:28:46,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:46,679 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:46,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:46,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:46,891 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:46,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1616484567, now seen corresponding path program 1 times [2022-11-21 16:28:46,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:46,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196333827] [2022-11-21 16:28:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:46,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:47,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196333827] [2022-11-21 16:28:47,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196333827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:47,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:47,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:28:47,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945724261] [2022-11-21 16:28:47,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:47,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:28:47,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:47,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:28:47,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:28:47,129 INFO L87 Difference]: Start difference. First operand 359 states and 541 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:47,285 INFO L93 Difference]: Finished difference Result 779 states and 1170 transitions. [2022-11-21 16:28:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:28:47,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-11-21 16:28:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:47,288 INFO L225 Difference]: With dead ends: 779 [2022-11-21 16:28:47,289 INFO L226 Difference]: Without dead ends: 473 [2022-11-21 16:28:47,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:28:47,291 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 75 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:47,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 735 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:28:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-11-21 16:28:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2022-11-21 16:28:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 424 states have (on average 1.4103773584905661) internal successors, (598), 430 states have internal predecessors, (598), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2022-11-21 16:28:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 682 transitions. [2022-11-21 16:28:47,317 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 682 transitions. Word has length 41 [2022-11-21 16:28:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:47,318 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 682 transitions. [2022-11-21 16:28:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 682 transitions. [2022-11-21 16:28:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-21 16:28:47,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:47,319 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:47,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:28:47,320 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:47,320 INFO L85 PathProgramCache]: Analyzing trace with hash 337909198, now seen corresponding path program 1 times [2022-11-21 16:28:47,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:47,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859604362] [2022-11-21 16:28:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:47,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:47,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:47,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859604362] [2022-11-21 16:28:47,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859604362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:47,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:47,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:28:47,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904088185] [2022-11-21 16:28:47,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:47,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:28:47,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:28:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:28:47,384 INFO L87 Difference]: Start difference. First operand 469 states and 682 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:47,428 INFO L93 Difference]: Finished difference Result 476 states and 688 transitions. [2022-11-21 16:28:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:28:47,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-11-21 16:28:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:47,431 INFO L225 Difference]: With dead ends: 476 [2022-11-21 16:28:47,432 INFO L226 Difference]: Without dead ends: 469 [2022-11-21 16:28:47,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:28:47,433 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 5 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:47,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 528 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-11-21 16:28:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2022-11-21 16:28:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 422 states have (on average 1.40521327014218) internal successors, (593), 428 states have internal predecessors, (593), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2022-11-21 16:28:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 677 transitions. [2022-11-21 16:28:47,460 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 677 transitions. Word has length 42 [2022-11-21 16:28:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:47,460 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 677 transitions. [2022-11-21 16:28:47,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 677 transitions. [2022-11-21 16:28:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:28:47,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:47,462 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:47,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:28:47,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:47,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1951760518, now seen corresponding path program 1 times [2022-11-21 16:28:47,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:47,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219115969] [2022-11-21 16:28:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:47,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:47,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219115969] [2022-11-21 16:28:47,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219115969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:47,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:47,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:28:47,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377926349] [2022-11-21 16:28:47,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:47,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:28:47,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:47,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:28:47,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:28:47,526 INFO L87 Difference]: Start difference. First operand 467 states and 677 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:47,575 INFO L93 Difference]: Finished difference Result 517 states and 742 transitions. [2022-11-21 16:28:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:28:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-11-21 16:28:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:47,580 INFO L225 Difference]: With dead ends: 517 [2022-11-21 16:28:47,580 INFO L226 Difference]: Without dead ends: 443 [2022-11-21 16:28:47,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:28:47,582 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 115 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:47,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 435 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-21 16:28:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 347. [2022-11-21 16:28:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 316 states have (on average 1.370253164556962) internal successors, (433), 318 states have internal predecessors, (433), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (29), 28 states have call predecessors, (29), 25 states have call successors, (29) [2022-11-21 16:28:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 489 transitions. [2022-11-21 16:28:47,635 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 489 transitions. Word has length 43 [2022-11-21 16:28:47,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:47,636 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 489 transitions. [2022-11-21 16:28:47,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 489 transitions. [2022-11-21 16:28:47,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:28:47,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:47,638 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:28:47,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:28:47,638 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:47,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1645353096, now seen corresponding path program 1 times [2022-11-21 16:28:47,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:47,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598636345] [2022-11-21 16:28:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:47,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:47,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598636345] [2022-11-21 16:28:47,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598636345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:47,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:47,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:28:47,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492374189] [2022-11-21 16:28:47,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:47,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:28:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:47,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:28:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:28:47,757 INFO L87 Difference]: Start difference. First operand 347 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:48,001 INFO L93 Difference]: Finished difference Result 876 states and 1271 transitions. [2022-11-21 16:28:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:28:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-11-21 16:28:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:48,007 INFO L225 Difference]: With dead ends: 876 [2022-11-21 16:28:48,007 INFO L226 Difference]: Without dead ends: 728 [2022-11-21 16:28:48,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:28:48,009 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 179 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:48,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1116 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:28:48,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-21 16:28:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 442. [2022-11-21 16:28:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 410 states have (on average 1.3780487804878048) internal successors, (565), 411 states have internal predecessors, (565), 27 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (33), 30 states have call predecessors, (33), 25 states have call successors, (33) [2022-11-21 16:28:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 625 transitions. [2022-11-21 16:28:48,049 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 625 transitions. Word has length 45 [2022-11-21 16:28:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:48,049 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 625 transitions. [2022-11-21 16:28:48,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 625 transitions. [2022-11-21 16:28:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:28:48,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:48,051 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:28:48,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:28:48,052 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash 836006470, now seen corresponding path program 1 times [2022-11-21 16:28:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:48,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470199523] [2022-11-21 16:28:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:48,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:48,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:48,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:48,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:48,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:48,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470199523] [2022-11-21 16:28:48,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470199523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450363805] [2022-11-21 16:28:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:48,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:48,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:48,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:28:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:28:48,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:28:48,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:48,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450363805] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:48,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:28:48,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 12 [2022-11-21 16:28:48,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544483226] [2022-11-21 16:28:48,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:48,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:28:48,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:48,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:28:48,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:28:48,598 INFO L87 Difference]: Start difference. First operand 442 states and 625 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:48,655 INFO L93 Difference]: Finished difference Result 646 states and 902 transitions. [2022-11-21 16:28:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:28:48,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-11-21 16:28:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:48,659 INFO L225 Difference]: With dead ends: 646 [2022-11-21 16:28:48,659 INFO L226 Difference]: Without dead ends: 414 [2022-11-21 16:28:48,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:28:48,661 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 99 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:48,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 318 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-21 16:28:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 352. [2022-11-21 16:28:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 326 states have (on average 1.3466257668711656) internal successors, (439), 328 states have internal predecessors, (439), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (27), 23 states have call predecessors, (27), 19 states have call successors, (27) [2022-11-21 16:28:48,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 487 transitions. [2022-11-21 16:28:48,732 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 487 transitions. Word has length 45 [2022-11-21 16:28:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:48,733 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 487 transitions. [2022-11-21 16:28:48,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:48,733 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 487 transitions. [2022-11-21 16:28:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:28:48,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:48,735 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:28:48,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:48,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:28:48,943 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash 980602509, now seen corresponding path program 1 times [2022-11-21 16:28:48,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:48,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086753286] [2022-11-21 16:28:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:48,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 16:28:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:49,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:49,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086753286] [2022-11-21 16:28:49,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086753286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:49,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:49,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:28:49,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582478121] [2022-11-21 16:28:49,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:49,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:28:49,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:28:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:28:49,072 INFO L87 Difference]: Start difference. First operand 352 states and 487 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:49,140 INFO L93 Difference]: Finished difference Result 580 states and 799 transitions. [2022-11-21 16:28:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:28:49,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-11-21 16:28:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:49,144 INFO L225 Difference]: With dead ends: 580 [2022-11-21 16:28:49,144 INFO L226 Difference]: Without dead ends: 540 [2022-11-21 16:28:49,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:28:49,145 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 124 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:49,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 456 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-21 16:28:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 390. [2022-11-21 16:28:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3471074380165289) internal successors, (489), 364 states have internal predecessors, (489), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-21 16:28:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 539 transitions. [2022-11-21 16:28:49,185 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 539 transitions. Word has length 45 [2022-11-21 16:28:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:49,185 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 539 transitions. [2022-11-21 16:28:49,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 539 transitions. [2022-11-21 16:28:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:28:49,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:49,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:49,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:28:49,188 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:49,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:49,188 INFO L85 PathProgramCache]: Analyzing trace with hash 828308281, now seen corresponding path program 1 times [2022-11-21 16:28:49,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:49,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324723843] [2022-11-21 16:28:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:49,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:49,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:49,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324723843] [2022-11-21 16:28:49,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324723843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:49,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:49,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:28:49,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840519293] [2022-11-21 16:28:49,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:49,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:28:49,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:28:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:28:49,246 INFO L87 Difference]: Start difference. First operand 390 states and 539 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:49,291 INFO L93 Difference]: Finished difference Result 406 states and 556 transitions. [2022-11-21 16:28:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:28:49,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-11-21 16:28:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:49,295 INFO L225 Difference]: With dead ends: 406 [2022-11-21 16:28:49,295 INFO L226 Difference]: Without dead ends: 390 [2022-11-21 16:28:49,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:28:49,296 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:49,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 393 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-21 16:28:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-11-21 16:28:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3415977961432506) internal successors, (487), 364 states have internal predecessors, (487), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-21 16:28:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 537 transitions. [2022-11-21 16:28:49,329 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 537 transitions. Word has length 46 [2022-11-21 16:28:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:49,330 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 537 transitions. [2022-11-21 16:28:49,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 537 transitions. [2022-11-21 16:28:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:28:49,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:49,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:49,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:28:49,332 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash 127243703, now seen corresponding path program 1 times [2022-11-21 16:28:49,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730836530] [2022-11-21 16:28:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:49,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:49,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730836530] [2022-11-21 16:28:49,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730836530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:49,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503784770] [2022-11-21 16:28:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:49,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:49,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:49,626 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:49,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:28:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:49,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 16:28:49,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:28:49,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:50,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503784770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:50,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:50,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2022-11-21 16:28:50,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320805894] [2022-11-21 16:28:50,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:50,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:28:50,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:28:50,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:28:50,070 INFO L87 Difference]: Start difference. First operand 390 states and 537 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-21 16:28:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:50,952 INFO L93 Difference]: Finished difference Result 726 states and 1003 transitions. [2022-11-21 16:28:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:28:50,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2022-11-21 16:28:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:50,955 INFO L225 Difference]: With dead ends: 726 [2022-11-21 16:28:50,955 INFO L226 Difference]: Without dead ends: 339 [2022-11-21 16:28:50,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-11-21 16:28:50,957 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 326 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:50,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 2042 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:28:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-21 16:28:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 266. [2022-11-21 16:28:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 244 states have (on average 1.3278688524590163) internal successors, (324), 244 states have internal predecessors, (324), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (24), 19 states have call predecessors, (24), 15 states have call successors, (24) [2022-11-21 16:28:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 364 transitions. [2022-11-21 16:28:50,981 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 364 transitions. Word has length 46 [2022-11-21 16:28:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:50,982 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 364 transitions. [2022-11-21 16:28:50,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-21 16:28:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 364 transitions. [2022-11-21 16:28:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:28:50,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:50,984 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:50,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:51,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:28:51,195 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash 705038931, now seen corresponding path program 1 times [2022-11-21 16:28:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:51,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309678362] [2022-11-21 16:28:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:51,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:51,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:51,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:51,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309678362] [2022-11-21 16:28:51,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309678362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297853974] [2022-11-21 16:28:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:51,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:51,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:51,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:51,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:28:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:51,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:28:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:51,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:28:51,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297853974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:51,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:28:51,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-21 16:28:51,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597757609] [2022-11-21 16:28:51,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:51,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:28:51,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:28:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:28:51,659 INFO L87 Difference]: Start difference. First operand 266 states and 364 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:51,913 INFO L93 Difference]: Finished difference Result 428 states and 595 transitions. [2022-11-21 16:28:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:28:51,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-11-21 16:28:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:51,916 INFO L225 Difference]: With dead ends: 428 [2022-11-21 16:28:51,916 INFO L226 Difference]: Without dead ends: 355 [2022-11-21 16:28:51,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:28:51,918 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 132 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:51,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 716 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:28:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-21 16:28:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 296. [2022-11-21 16:28:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 266 states have (on average 1.3421052631578947) internal successors, (357), 269 states have internal predecessors, (357), 24 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (27), 24 states have call predecessors, (27), 22 states have call successors, (27) [2022-11-21 16:28:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 408 transitions. [2022-11-21 16:28:51,944 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 408 transitions. Word has length 48 [2022-11-21 16:28:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:51,945 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 408 transitions. [2022-11-21 16:28:51,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 408 transitions. [2022-11-21 16:28:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-21 16:28:51,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:51,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:51,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:52,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:28:52,153 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1641997822, now seen corresponding path program 1 times [2022-11-21 16:28:52,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:52,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532966125] [2022-11-21 16:28:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:52,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 16:28:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-21 16:28:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:52,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532966125] [2022-11-21 16:28:52,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532966125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:52,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899184325] [2022-11-21 16:28:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:52,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:52,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:52,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:52,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:28:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 16:28:52,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-21 16:28:52,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:28:52,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899184325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:52,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:28:52,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 15 [2022-11-21 16:28:52,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548054792] [2022-11-21 16:28:52,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:52,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:28:52,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:52,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:28:52,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:28:52,832 INFO L87 Difference]: Start difference. First operand 296 states and 408 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 16:28:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:53,704 INFO L93 Difference]: Finished difference Result 826 states and 1149 transitions. [2022-11-21 16:28:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:28:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-11-21 16:28:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:53,707 INFO L225 Difference]: With dead ends: 826 [2022-11-21 16:28:53,707 INFO L226 Difference]: Without dead ends: 582 [2022-11-21 16:28:53,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:28:53,709 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 529 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:53,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1107 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:28:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-11-21 16:28:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 532. [2022-11-21 16:28:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 480 states have (on average 1.3020833333333333) internal successors, (625), 484 states have internal predecessors, (625), 46 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (49), 47 states have call predecessors, (49), 43 states have call successors, (49) [2022-11-21 16:28:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 720 transitions. [2022-11-21 16:28:53,756 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 720 transitions. Word has length 49 [2022-11-21 16:28:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:53,756 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 720 transitions. [2022-11-21 16:28:53,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 16:28:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 720 transitions. [2022-11-21 16:28:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 16:28:53,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:53,758 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:28:53,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:53,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:28:53,966 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:53,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash 164141512, now seen corresponding path program 1 times [2022-11-21 16:28:53,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:53,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877776967] [2022-11-21 16:28:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:53,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:54,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:54,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:54,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:28:54,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:54,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877776967] [2022-11-21 16:28:54,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877776967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:54,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92465920] [2022-11-21 16:28:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:54,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:54,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:54,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:28:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:28:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:28:55,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:28:55,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92465920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:55,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:28:55,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 24 [2022-11-21 16:28:55,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396169262] [2022-11-21 16:28:55,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:55,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:28:55,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:55,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:28:55,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:28:55,053 INFO L87 Difference]: Start difference. First operand 532 states and 720 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:55,743 INFO L93 Difference]: Finished difference Result 963 states and 1327 transitions. [2022-11-21 16:28:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:28:55,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-11-21 16:28:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:55,748 INFO L225 Difference]: With dead ends: 963 [2022-11-21 16:28:55,748 INFO L226 Difference]: Without dead ends: 841 [2022-11-21 16:28:55,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-11-21 16:28:55,750 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 359 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:55,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 1423 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:28:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-11-21 16:28:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 712. [2022-11-21 16:28:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 640 states have (on average 1.296875) internal successors, (830), 645 states have internal predecessors, (830), 66 states have call successors, (66), 3 states have call predecessors, (66), 5 states have return successors, (69), 68 states have call predecessors, (69), 63 states have call successors, (69) [2022-11-21 16:28:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 965 transitions. [2022-11-21 16:28:55,814 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 965 transitions. Word has length 50 [2022-11-21 16:28:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:55,815 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 965 transitions. [2022-11-21 16:28:55,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 965 transitions. [2022-11-21 16:28:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:28:55,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:55,817 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:28:55,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:56,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:56,023 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1732806460, now seen corresponding path program 1 times [2022-11-21 16:28:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:56,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774847580] [2022-11-21 16:28:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:56,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:56,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:56,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:56,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:56,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:56,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774847580] [2022-11-21 16:28:56,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774847580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:56,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:56,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:28:56,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644609730] [2022-11-21 16:28:56,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:56,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:28:56,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:28:56,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:28:56,099 INFO L87 Difference]: Start difference. First operand 712 states and 965 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:56,185 INFO L93 Difference]: Finished difference Result 721 states and 973 transitions. [2022-11-21 16:28:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:28:56,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-21 16:28:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:56,189 INFO L225 Difference]: With dead ends: 721 [2022-11-21 16:28:56,189 INFO L226 Difference]: Without dead ends: 686 [2022-11-21 16:28:56,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:28:56,191 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:56,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 384 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-11-21 16:28:56,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 662. [2022-11-21 16:28:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 596 states have (on average 1.2986577181208054) internal successors, (774), 601 states have internal predecessors, (774), 60 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (62), 61 states have call predecessors, (62), 57 states have call successors, (62) [2022-11-21 16:28:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 896 transitions. [2022-11-21 16:28:56,252 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 896 transitions. Word has length 52 [2022-11-21 16:28:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:56,252 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 896 transitions. [2022-11-21 16:28:56,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 896 transitions. [2022-11-21 16:28:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:28:56,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:56,257 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:28:56,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 16:28:56,257 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:56,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1348659453, now seen corresponding path program 1 times [2022-11-21 16:28:56,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:56,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937040283] [2022-11-21 16:28:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:56,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:56,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:56,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:56,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:28:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:56,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:56,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937040283] [2022-11-21 16:28:56,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937040283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:56,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:56,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:28:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286823660] [2022-11-21 16:28:56,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:28:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:28:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:28:56,609 INFO L87 Difference]: Start difference. First operand 662 states and 896 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:57,329 INFO L93 Difference]: Finished difference Result 882 states and 1199 transitions. [2022-11-21 16:28:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:28:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-11-21 16:28:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:57,334 INFO L225 Difference]: With dead ends: 882 [2022-11-21 16:28:57,334 INFO L226 Difference]: Without dead ends: 864 [2022-11-21 16:28:57,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:28:57,338 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 267 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:57,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 797 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:28:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-11-21 16:28:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 698. [2022-11-21 16:28:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 628 states have (on average 1.2961783439490446) internal successors, (814), 634 states have internal predecessors, (814), 64 states have call successors, (64), 3 states have call predecessors, (64), 5 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-21 16:28:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 944 transitions. [2022-11-21 16:28:57,455 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 944 transitions. Word has length 53 [2022-11-21 16:28:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:57,455 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 944 transitions. [2022-11-21 16:28:57,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 944 transitions. [2022-11-21 16:28:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:28:57,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:57,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-21 16:28:57,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 16:28:57,458 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash -38305071, now seen corresponding path program 1 times [2022-11-21 16:28:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:57,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752814035] [2022-11-21 16:28:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:57,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:57,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-21 16:28:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:28:57,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:57,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752814035] [2022-11-21 16:28:57,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752814035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:57,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:57,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:28:57,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958068816] [2022-11-21 16:28:57,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:57,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:28:57,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:57,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:28:57,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:28:57,578 INFO L87 Difference]: Start difference. First operand 698 states and 944 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:57,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:57,721 INFO L93 Difference]: Finished difference Result 753 states and 1013 transitions. [2022-11-21 16:28:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:28:57,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-11-21 16:28:57,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:57,725 INFO L225 Difference]: With dead ends: 753 [2022-11-21 16:28:57,726 INFO L226 Difference]: Without dead ends: 751 [2022-11-21 16:28:57,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:28:57,727 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 41 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:57,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 669 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-21 16:28:57,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 710. [2022-11-21 16:28:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 635 states have (on average 1.2929133858267716) internal successors, (821), 645 states have internal predecessors, (821), 68 states have call successors, (68), 4 states have call predecessors, (68), 6 states have return successors, (70), 65 states have call predecessors, (70), 65 states have call successors, (70) [2022-11-21 16:28:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 959 transitions. [2022-11-21 16:28:57,829 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 959 transitions. Word has length 54 [2022-11-21 16:28:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:57,830 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 959 transitions. [2022-11-21 16:28:57,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 959 transitions. [2022-11-21 16:28:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:28:57,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:57,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-21 16:28:57,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 16:28:57,832 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash 18953231, now seen corresponding path program 1 times [2022-11-21 16:28:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:57,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790093821] [2022-11-21 16:28:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:57,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:57,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:57,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-21 16:28:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:28:57,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:57,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790093821] [2022-11-21 16:28:57,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790093821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:57,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:57,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:28:57,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403952599] [2022-11-21 16:28:57,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:28:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:28:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:28:57,973 INFO L87 Difference]: Start difference. First operand 710 states and 959 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:58,139 INFO L93 Difference]: Finished difference Result 775 states and 1043 transitions. [2022-11-21 16:28:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:28:58,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-11-21 16:28:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:58,144 INFO L225 Difference]: With dead ends: 775 [2022-11-21 16:28:58,144 INFO L226 Difference]: Without dead ends: 773 [2022-11-21 16:28:58,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:28:58,145 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 39 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:58,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 697 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-11-21 16:28:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 718. [2022-11-21 16:28:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 638 states have (on average 1.29153605015674) internal successors, (824), 652 states have internal predecessors, (824), 72 states have call successors, (72), 5 states have call predecessors, (72), 7 states have return successors, (74), 65 states have call predecessors, (74), 69 states have call successors, (74) [2022-11-21 16:28:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 970 transitions. [2022-11-21 16:28:58,255 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 970 transitions. Word has length 54 [2022-11-21 16:28:58,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:58,255 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 970 transitions. [2022-11-21 16:28:58,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:28:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 970 transitions. [2022-11-21 16:28:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:28:58,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:58,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:58,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 16:28:58,257 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash -931744545, now seen corresponding path program 1 times [2022-11-21 16:28:58,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:58,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576912717] [2022-11-21 16:28:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:58,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:58,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:58,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:28:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:58,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 16:28:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-21 16:28:58,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576912717] [2022-11-21 16:28:58,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576912717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:58,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:58,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-21 16:28:58,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48316586] [2022-11-21 16:28:58,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:58,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:28:58,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:28:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:28:58,839 INFO L87 Difference]: Start difference. First operand 718 states and 970 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 16:28:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:59,544 INFO L93 Difference]: Finished difference Result 755 states and 1013 transitions. [2022-11-21 16:28:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:28:59,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-11-21 16:28:59,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:59,549 INFO L225 Difference]: With dead ends: 755 [2022-11-21 16:28:59,549 INFO L226 Difference]: Without dead ends: 753 [2022-11-21 16:28:59,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:28:59,552 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 268 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:59,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 2120 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:28:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-21 16:28:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 727. [2022-11-21 16:28:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 645 states have (on average 1.289922480620155) internal successors, (832), 660 states have internal predecessors, (832), 73 states have call successors, (73), 6 states have call predecessors, (73), 8 states have return successors, (75), 65 states have call predecessors, (75), 70 states have call successors, (75) [2022-11-21 16:28:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 980 transitions. [2022-11-21 16:28:59,662 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 980 transitions. Word has length 54 [2022-11-21 16:28:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:59,662 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 980 transitions. [2022-11-21 16:28:59,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 16:28:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 980 transitions. [2022-11-21 16:28:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:28:59,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:59,664 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:28:59,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-21 16:28:59,665 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1315627843, now seen corresponding path program 1 times [2022-11-21 16:28:59,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:59,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049662331] [2022-11-21 16:28:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:59,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:00,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:00,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:29:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:00,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 16:29:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:29:00,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:00,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049662331] [2022-11-21 16:29:00,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049662331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:00,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298639435] [2022-11-21 16:29:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:00,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:00,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:00,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:00,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:29:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:00,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:29:00,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:29:00,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:29:00,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298639435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:29:00,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:29:00,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2022-11-21 16:29:00,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11926987] [2022-11-21 16:29:00,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:29:00,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:29:00,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:29:00,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:29:00,526 INFO L87 Difference]: Start difference. First operand 727 states and 980 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:29:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:00,870 INFO L93 Difference]: Finished difference Result 922 states and 1252 transitions. [2022-11-21 16:29:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:29:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2022-11-21 16:29:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:00,875 INFO L225 Difference]: With dead ends: 922 [2022-11-21 16:29:00,875 INFO L226 Difference]: Without dead ends: 859 [2022-11-21 16:29:00,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:29:00,877 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 213 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:00,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 830 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:29:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-11-21 16:29:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 644. [2022-11-21 16:29:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 572 states have (on average 1.2902097902097902) internal successors, (738), 586 states have internal predecessors, (738), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2022-11-21 16:29:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 866 transitions. [2022-11-21 16:29:01,011 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 866 transitions. Word has length 55 [2022-11-21 16:29:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:01,011 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 866 transitions. [2022-11-21 16:29:01,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:29:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 866 transitions. [2022-11-21 16:29:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:29:01,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:01,013 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:29:01,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:01,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:01,220 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:29:01,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash 997951512, now seen corresponding path program 1 times [2022-11-21 16:29:01,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:01,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867395511] [2022-11-21 16:29:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:01,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:01,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:29:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:01,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-21 16:29:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:29:01,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:01,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867395511] [2022-11-21 16:29:01,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867395511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:01,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805613221] [2022-11-21 16:29:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:01,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:01,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:01,792 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:01,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:29:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:01,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:29:01,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 16:29:01,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:29:01,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805613221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:29:01,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:29:01,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 20 [2022-11-21 16:29:01,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385217642] [2022-11-21 16:29:01,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:29:01,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:29:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:29:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:29:01,972 INFO L87 Difference]: Start difference. First operand 644 states and 866 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:29:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:02,247 INFO L93 Difference]: Finished difference Result 785 states and 1038 transitions. [2022-11-21 16:29:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:29:02,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2022-11-21 16:29:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:02,251 INFO L225 Difference]: With dead ends: 785 [2022-11-21 16:29:02,251 INFO L226 Difference]: Without dead ends: 751 [2022-11-21 16:29:02,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:29:02,253 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 314 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:02,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 412 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:29:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-21 16:29:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 644. [2022-11-21 16:29:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 572 states have (on average 1.2867132867132867) internal successors, (736), 586 states have internal predecessors, (736), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2022-11-21 16:29:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 864 transitions. [2022-11-21 16:29:02,379 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 864 transitions. Word has length 55 [2022-11-21 16:29:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:02,379 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 864 transitions. [2022-11-21 16:29:02,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:29:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 864 transitions. [2022-11-21 16:29:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:29:02,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:02,381 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-21 16:29:02,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:02,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:02,587 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:29:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1506046358, now seen corresponding path program 1 times [2022-11-21 16:29:02,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:02,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928407062] [2022-11-21 16:29:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:02,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:29:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:02,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-21 16:29:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:29:02,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928407062] [2022-11-21 16:29:02,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928407062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549496575] [2022-11-21 16:29:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:02,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:02,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:02,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:02,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:29:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:02,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:29:02,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:29:02,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:29:02,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549496575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:29:02,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:29:02,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-11-21 16:29:02,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118336091] [2022-11-21 16:29:02,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:29:02,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:29:02,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:02,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:29:02,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:29:02,956 INFO L87 Difference]: Start difference. First operand 644 states and 864 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:29:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:03,079 INFO L93 Difference]: Finished difference Result 958 states and 1299 transitions. [2022-11-21 16:29:03,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:29:03,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2022-11-21 16:29:03,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:03,087 INFO L225 Difference]: With dead ends: 958 [2022-11-21 16:29:03,087 INFO L226 Difference]: Without dead ends: 684 [2022-11-21 16:29:03,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:29:03,089 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:03,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 371 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:29:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-11-21 16:29:03,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 664. [2022-11-21 16:29:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 592 states have (on average 1.277027027027027) internal successors, (756), 606 states have internal predecessors, (756), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2022-11-21 16:29:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 884 transitions. [2022-11-21 16:29:03,215 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 884 transitions. Word has length 57 [2022-11-21 16:29:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:03,215 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 884 transitions. [2022-11-21 16:29:03,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 16:29:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 884 transitions. [2022-11-21 16:29:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:29:03,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:03,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-21 16:29:03,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-21 16:29:03,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-21 16:29:03,426 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:29:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash 696699732, now seen corresponding path program 1 times [2022-11-21 16:29:03,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:03,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734919502] [2022-11-21 16:29:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:03,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:04,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:04,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:29:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:04,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-21 16:29:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:29:04,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:04,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734919502] [2022-11-21 16:29:04,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734919502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:04,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789648929] [2022-11-21 16:29:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:04,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:04,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:04,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:04,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:29:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-21 16:29:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:29:05,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:29:08,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789648929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:08,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:29:08,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 46 [2022-11-21 16:29:08,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846570766] [2022-11-21 16:29:08,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:08,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-21 16:29:08,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-21 16:29:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1928, Unknown=0, NotChecked=0, Total=2070 [2022-11-21 16:29:08,851 INFO L87 Difference]: Start difference. First operand 664 states and 884 transitions. Second operand has 46 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 38 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-21 16:29:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:15,153 INFO L93 Difference]: Finished difference Result 1216 states and 1636 transitions. [2022-11-21 16:29:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 16:29:15,154 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 38 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2022-11-21 16:29:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:15,159 INFO L225 Difference]: With dead ends: 1216 [2022-11-21 16:29:15,159 INFO L226 Difference]: Without dead ends: 1052 [2022-11-21 16:29:15,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=399, Invalid=4293, Unknown=0, NotChecked=0, Total=4692 [2022-11-21 16:29:15,163 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 996 mSDsluCounter, 4470 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 4646 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:15,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 4646 Invalid, 2700 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [125 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-21 16:29:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-21 16:29:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 776. [2022-11-21 16:29:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 692 states have (on average 1.2760115606936415) internal successors, (883), 706 states have internal predecessors, (883), 74 states have call successors, (74), 7 states have call predecessors, (74), 9 states have return successors, (79), 66 states have call predecessors, (79), 71 states have call successors, (79) [2022-11-21 16:29:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1036 transitions. [2022-11-21 16:29:15,308 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1036 transitions. Word has length 57 [2022-11-21 16:29:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:15,308 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1036 transitions. [2022-11-21 16:29:15,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 38 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-21 16:29:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1036 transitions. [2022-11-21 16:29:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:29:15,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:15,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-21 16:29:15,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:15,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 16:29:15,518 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:29:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:15,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1129526808, now seen corresponding path program 1 times [2022-11-21 16:29:15,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:15,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716592028] [2022-11-21 16:29:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:15,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:16,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:16,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:29:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 16:29:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:29:16,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:16,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716592028] [2022-11-21 16:29:16,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716592028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:16,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604159593] [2022-11-21 16:29:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:16,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:16,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:16,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ec5f68-4bbb-444f-8954-901c2772ac63/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:29:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:16,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-21 16:29:16,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:06,394 WARN L233 SmtUtils]: Spent 1.75m on a formula simplification. DAG size of input: 15262 DAG size of output: 15261 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)