./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ --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 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 --- 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-dbf71c6-m [2022-10-17 10:51:21,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:51:21,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:51:21,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:51:21,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:51:21,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:51:21,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:51:21,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:51:21,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:51:21,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:51:21,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:51:21,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:51:21,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:51:22,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:51:22,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:51:22,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:51:22,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:51:22,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:51:22,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:51:22,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:51:22,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:51:22,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:51:22,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:51:22,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:51:22,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:51:22,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:51:22,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:51:22,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:51:22,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:51:22,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:51:22,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:51:22,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:51:22,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:51:22,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:51:22,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:51:22,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:51:22,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:51:22,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:51:22,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:51:22,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:51:22,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:51:22,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:51:22,062 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:51:22,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:51:22,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:51:22,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:51:22,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:51:22,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:51:22,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:51:22,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:51:22,067 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:51:22,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:51:22,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:51:22,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:51:22,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:51:22,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:51:22,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:51:22,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:51:22,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:51:22,070 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:51:22,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:51:22,070 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:51:22,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:51:22,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:51:22,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:51:22,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:51:22,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:51:22,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:51:22,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:51:22,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:51:22,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:51:22,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:51:22,073 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:51:22,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:51:22,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:51:22,074 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_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 [2022-10-17 10:51:22,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:51:22,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:51:22,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:51:22,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:51:22,366 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:51:22,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2022-10-17 10:51:22,443 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/data/65a5aad7c/53201042e3b24006a7c48ded29d4920f/FLAGca792e2af [2022-10-17 10:51:22,883 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:51:22,884 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2022-10-17 10:51:22,891 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/data/65a5aad7c/53201042e3b24006a7c48ded29d4920f/FLAGca792e2af [2022-10-17 10:51:23,279 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/data/65a5aad7c/53201042e3b24006a7c48ded29d4920f [2022-10-17 10:51:23,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:51:23,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:51:23,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:51:23,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:51:23,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:51:23,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd728a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23, skipping insertion in model container [2022-10-17 10:51:23,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:51:23,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:51:23,505 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c[951,964] [2022-10-17 10:51:23,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:51:23,519 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:51:23,545 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c[951,964] [2022-10-17 10:51:23,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:51:23,564 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:51:23,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23 WrapperNode [2022-10-17 10:51:23,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:51:23,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:51:23,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:51:23,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:51:23,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,601 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-10-17 10:51:23,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:51:23,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:51:23,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:51:23,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:51:23,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:51:23,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:51:23,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:51:23,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:51:23,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (1/1) ... [2022-10-17 10:51:23,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:51:23,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:23,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:51:23,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:51:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:51:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:51:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-10-17 10:51:23,705 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-10-17 10:51:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-10-17 10:51:23,705 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-10-17 10:51:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:51:23,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:51:23,759 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:51:23,761 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:51:23,917 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:51:23,930 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:51:23,930 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 10:51:23,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:51:23 BoogieIcfgContainer [2022-10-17 10:51:23,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:51:23,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:51:23,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:51:23,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:51:23,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:51:23" (1/3) ... [2022-10-17 10:51:23,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53499a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:51:23, skipping insertion in model container [2022-10-17 10:51:23,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:51:23" (2/3) ... [2022-10-17 10:51:23,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53499a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:51:23, skipping insertion in model container [2022-10-17 10:51:23,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:51:23" (3/3) ... [2022-10-17 10:51:23,956 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2022-10-17 10:51:23,986 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:51:23,986 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:51:24,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:51:24,058 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;@69de97f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:51:24,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:51:24,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:51:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:51:24,070 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:24,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:24,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2022-10-17 10:51:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:24,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939726986] [2022-10-17 10:51:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:24,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:51:24,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939726986] [2022-10-17 10:51:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939726986] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:51:24,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:51:24,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:51:24,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530966813] [2022-10-17 10:51:24,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:51:24,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:51:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:51:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:51:24,414 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:51:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:24,467 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-10-17 10:51:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:51:24,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-10-17 10:51:24,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:24,478 INFO L225 Difference]: With dead ends: 43 [2022-10-17 10:51:24,478 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 10:51:24,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:51:24,485 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:24,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 123 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:51:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 10:51:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-10-17 10:51:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 10:51:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-10-17 10:51:24,527 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2022-10-17 10:51:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:24,528 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-10-17 10:51:24,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:51:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-10-17 10:51:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:51:24,530 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:24,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:24,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:51:24,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:24,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2022-10-17 10:51:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:24,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517154313] [2022-10-17 10:51:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:24,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:24,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:51:24,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517154313] [2022-10-17 10:51:24,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517154313] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:51:24,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:51:24,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:51:24,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489799984] [2022-10-17 10:51:24,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:51:24,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:51:24,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:51:24,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:51:24,652 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:51:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:24,701 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-10-17 10:51:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:51:24,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 10:51:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:24,707 INFO L225 Difference]: With dead ends: 33 [2022-10-17 10:51:24,707 INFO L226 Difference]: Without dead ends: 29 [2022-10-17 10:51:24,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:51:24,713 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:24,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:51:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-17 10:51:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-10-17 10:51:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 10:51:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-10-17 10:51:24,726 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2022-10-17 10:51:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:24,727 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-10-17 10:51:24,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:51:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-10-17 10:51:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:51:24,729 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:24,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:24,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:51:24,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2022-10-17 10:51:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:24,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970234998] [2022-10-17 10:51:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:24,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:24,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:24,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:25,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:51:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:51:25,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:25,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970234998] [2022-10-17 10:51:25,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970234998] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:25,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239417146] [2022-10-17 10:51:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:25,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:25,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:25,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:25,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:51:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:25,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:51:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:51:25,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:51:25,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239417146] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:25,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:25,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-10-17 10:51:25,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296343438] [2022-10-17 10:51:25,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:25,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 10:51:25,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:25,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 10:51:25,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:51:25,535 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:51:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:25,694 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-10-17 10:51:25,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:51:25,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2022-10-17 10:51:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:25,697 INFO L225 Difference]: With dead ends: 55 [2022-10-17 10:51:25,697 INFO L226 Difference]: Without dead ends: 31 [2022-10-17 10:51:25,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:51:25,703 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:25,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 112 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:51:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-17 10:51:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-10-17 10:51:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-17 10:51:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-10-17 10:51:25,724 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2022-10-17 10:51:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:25,725 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-10-17 10:51:25,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:51:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-10-17 10:51:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 10:51:25,731 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:25,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:25,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:25,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:25,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:25,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:25,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2022-10-17 10:51:25,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:25,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325639146] [2022-10-17 10:51:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:25,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:26,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:26,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:26,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:51:26,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:26,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325639146] [2022-10-17 10:51:26,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325639146] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:26,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236231091] [2022-10-17 10:51:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:26,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:26,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:26,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:26,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:51:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:26,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:51:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:51:26,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:51:26,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236231091] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:26,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:26,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-10-17 10:51:26,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789807991] [2022-10-17 10:51:26,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:26,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 10:51:26,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:26,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 10:51:26,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:51:26,483 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:51:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:26,690 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-10-17 10:51:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:51:26,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2022-10-17 10:51:26,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:26,697 INFO L225 Difference]: With dead ends: 51 [2022-10-17 10:51:26,697 INFO L226 Difference]: Without dead ends: 47 [2022-10-17 10:51:26,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:51:26,700 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:26,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 92 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:51:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-17 10:51:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-10-17 10:51:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-10-17 10:51:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-10-17 10:51:26,723 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2022-10-17 10:51:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:26,723 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-10-17 10:51:26,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:51:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-10-17 10:51:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 10:51:26,725 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:26,725 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:51:26,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:26,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:26,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:26,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2022-10-17 10:51:26,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:26,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483086756] [2022-10-17 10:51:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:26,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:26,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:27,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:27,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:27,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:51:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:27,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-10-17 10:51:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:51:27,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:27,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483086756] [2022-10-17 10:51:27,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483086756] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:27,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526862369] [2022-10-17 10:51:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:27,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:27,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:27,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:27,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:51:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:51:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:51:27,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:51:27,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526862369] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:27,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:27,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2022-10-17 10:51:27,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305867433] [2022-10-17 10:51:27,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:27,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:51:27,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:27,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:51:27,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:51:27,669 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2022-10-17 10:51:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:27,926 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2022-10-17 10:51:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:51:27,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2022-10-17 10:51:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:27,928 INFO L225 Difference]: With dead ends: 105 [2022-10-17 10:51:27,928 INFO L226 Difference]: Without dead ends: 63 [2022-10-17 10:51:27,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:51:27,931 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:27,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 95 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:51:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-10-17 10:51:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-10-17 10:51:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2022-10-17 10:51:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2022-10-17 10:51:27,944 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2022-10-17 10:51:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:27,945 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2022-10-17 10:51:27,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2022-10-17 10:51:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2022-10-17 10:51:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:51:27,948 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:27,948 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:51:27,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:28,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:28,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:28,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2022-10-17 10:51:28,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:28,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009671678] [2022-10-17 10:51:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:28,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:28,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:28,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:28,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:28,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:28,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 10:51:28,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:28,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009671678] [2022-10-17 10:51:28,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009671678] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898553002] [2022-10-17 10:51:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:28,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:28,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:28,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:28,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:51:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:28,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:51:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:51:28,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:51:28,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898553002] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:28,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:28,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2022-10-17 10:51:28,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840438314] [2022-10-17 10:51:28,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:28,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:51:28,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:28,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:51:28,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:51:28,834 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2022-10-17 10:51:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:29,275 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2022-10-17 10:51:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:51:29,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2022-10-17 10:51:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:29,279 INFO L225 Difference]: With dead ends: 177 [2022-10-17 10:51:29,279 INFO L226 Difference]: Without dead ends: 117 [2022-10-17 10:51:29,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:51:29,282 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:29,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 222 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:51:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-10-17 10:51:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-10-17 10:51:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2022-10-17 10:51:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2022-10-17 10:51:29,334 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2022-10-17 10:51:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:29,334 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2022-10-17 10:51:29,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2022-10-17 10:51:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2022-10-17 10:51:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-17 10:51:29,339 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:29,339 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:29,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:29,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:29,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:29,555 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2022-10-17 10:51:29,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:29,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432906410] [2022-10-17 10:51:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:29,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:29,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:29,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:29,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:29,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:29,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:29,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 10:51:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:51:29,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:29,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432906410] [2022-10-17 10:51:29,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432906410] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:29,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879269200] [2022-10-17 10:51:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:29,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:29,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:29,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:29,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:51:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:29,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:51:29,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 10:51:29,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:51:30,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879269200] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:30,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:30,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 20 [2022-10-17 10:51:30,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319014406] [2022-10-17 10:51:30,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:30,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 10:51:30,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 10:51:30,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:51:30,461 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2022-10-17 10:51:30,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:30,957 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2022-10-17 10:51:30,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 10:51:30,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) Word has length 51 [2022-10-17 10:51:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:30,966 INFO L225 Difference]: With dead ends: 255 [2022-10-17 10:51:30,966 INFO L226 Difference]: Without dead ends: 155 [2022-10-17 10:51:30,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-10-17 10:51:30,970 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:30,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 227 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:51:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-10-17 10:51:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2022-10-17 10:51:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2022-10-17 10:51:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2022-10-17 10:51:31,016 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2022-10-17 10:51:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:31,016 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2022-10-17 10:51:31,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2022-10-17 10:51:31,017 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2022-10-17 10:51:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-17 10:51:31,022 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:31,022 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:31,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:31,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash -586612948, now seen corresponding path program 1 times [2022-10-17 10:51:31,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:31,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159080598] [2022-10-17 10:51:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:51:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-10-17 10:51:31,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:31,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159080598] [2022-10-17 10:51:31,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159080598] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:31,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305293595] [2022-10-17 10:51:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:31,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:31,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:31,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:31,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:51:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:31,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:51:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-10-17 10:51:31,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-10-17 10:51:32,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305293595] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:32,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:32,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 24 [2022-10-17 10:51:32,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271490072] [2022-10-17 10:51:32,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:32,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:51:32,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:51:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:51:32,792 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 24 states, 22 states have (on average 3.5) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) [2022-10-17 10:51:33,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:33,341 INFO L93 Difference]: Finished difference Result 240 states and 462 transitions. [2022-10-17 10:51:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-17 10:51:33,342 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.5) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) Word has length 93 [2022-10-17 10:51:33,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:33,344 INFO L225 Difference]: With dead ends: 240 [2022-10-17 10:51:33,344 INFO L226 Difference]: Without dead ends: 107 [2022-10-17 10:51:33,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 194 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2022-10-17 10:51:33,347 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 111 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:33,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 209 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:51:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-10-17 10:51:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2022-10-17 10:51:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 14 states have call successors, (14), 8 states have call predecessors, (14), 12 states have return successors, (35), 17 states have call predecessors, (35), 14 states have call successors, (35) [2022-10-17 10:51:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2022-10-17 10:51:33,360 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 93 [2022-10-17 10:51:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:33,361 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2022-10-17 10:51:33,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.5) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) [2022-10-17 10:51:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2022-10-17 10:51:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-10-17 10:51:33,364 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:33,364 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:33,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:33,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:51:33,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:33,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1129417830, now seen corresponding path program 1 times [2022-10-17 10:51:33,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:33,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195789376] [2022-10-17 10:51:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:33,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:33,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:33,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:51:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-10-17 10:51:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 73 proven. 135 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2022-10-17 10:51:34,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195789376] [2022-10-17 10:51:34,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195789376] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343207058] [2022-10-17 10:51:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:34,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:34,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:34,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:34,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:51:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:51:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 36 proven. 211 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-10-17 10:51:34,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 36 proven. 227 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-10-17 10:51:35,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343207058] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:35,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:35,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 26 [2022-10-17 10:51:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102379945] [2022-10-17 10:51:35,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:35,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-17 10:51:35,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-17 10:51:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:51:35,755 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 26 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 20 states have call successors, (32) [2022-10-17 10:51:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:36,362 INFO L93 Difference]: Finished difference Result 214 states and 372 transitions. [2022-10-17 10:51:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-10-17 10:51:36,362 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 26 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 20 states have call successors, (32) Word has length 148 [2022-10-17 10:51:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:36,365 INFO L225 Difference]: With dead ends: 214 [2022-10-17 10:51:36,365 INFO L226 Difference]: Without dead ends: 134 [2022-10-17 10:51:36,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 320 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2022-10-17 10:51:36,367 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 108 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:36,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 235 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:51:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-10-17 10:51:36,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2022-10-17 10:51:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 78 states have internal predecessors, (93), 20 states have call successors, (20), 11 states have call predecessors, (20), 16 states have return successors, (56), 24 states have call predecessors, (56), 20 states have call successors, (56) [2022-10-17 10:51:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 169 transitions. [2022-10-17 10:51:36,400 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 169 transitions. Word has length 148 [2022-10-17 10:51:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:36,401 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 169 transitions. [2022-10-17 10:51:36,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 26 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 20 states have call successors, (32) [2022-10-17 10:51:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 169 transitions. [2022-10-17 10:51:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-10-17 10:51:36,422 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:36,422 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 18, 18, 17, 16, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:36,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:36,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:36,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash -399650163, now seen corresponding path program 2 times [2022-10-17 10:51:36,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:36,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292439219] [2022-10-17 10:51:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:36,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:36,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:51:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-10-17 10:51:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-10-17 10:51:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:51:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-10-17 10:51:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 169 proven. 360 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2022-10-17 10:51:37,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:37,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292439219] [2022-10-17 10:51:37,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292439219] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:37,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62217989] [2022-10-17 10:51:37,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:51:37,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:37,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:37,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:37,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:51:37,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:51:37,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:51:37,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:51:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 79 proven. 543 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2022-10-17 10:51:38,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 79 proven. 567 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2022-10-17 10:51:40,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62217989] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:40,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:40,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 17] total 28 [2022-10-17 10:51:40,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569149757] [2022-10-17 10:51:40,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:40,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-17 10:51:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-17 10:51:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:51:40,040 INFO L87 Difference]: Start difference. First operand 114 states and 169 transitions. Second operand has 28 states, 26 states have (on average 3.5) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (37), 14 states have call predecessors, (37), 22 states have call successors, (37) [2022-10-17 10:51:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:40,744 INFO L93 Difference]: Finished difference Result 260 states and 447 transitions. [2022-10-17 10:51:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-17 10:51:40,745 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.5) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (37), 14 states have call predecessors, (37), 22 states have call successors, (37) Word has length 271 [2022-10-17 10:51:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:40,748 INFO L225 Difference]: With dead ends: 260 [2022-10-17 10:51:40,748 INFO L226 Difference]: Without dead ends: 155 [2022-10-17 10:51:40,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 599 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2022-10-17 10:51:40,751 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 127 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:40,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 273 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:51:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-10-17 10:51:40,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2022-10-17 10:51:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 101 states have (on average 1.2376237623762376) internal successors, (125), 99 states have internal predecessors, (125), 26 states have call successors, (26), 18 states have call predecessors, (26), 17 states have return successors, (73), 27 states have call predecessors, (73), 26 states have call successors, (73) [2022-10-17 10:51:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 224 transitions. [2022-10-17 10:51:40,766 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 224 transitions. Word has length 271 [2022-10-17 10:51:40,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:40,767 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 224 transitions. [2022-10-17 10:51:40,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.5) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (37), 14 states have call predecessors, (37), 22 states have call successors, (37) [2022-10-17 10:51:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 224 transitions. [2022-10-17 10:51:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-10-17 10:51:40,775 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:40,775 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 25, 25, 22, 22, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 10, 8, 7, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:40,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:41,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:51:41,003 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash -854779469, now seen corresponding path program 3 times [2022-10-17 10:51:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232141392] [2022-10-17 10:51:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:41,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:41,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:41,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:51:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-10-17 10:51:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-10-17 10:51:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:51:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-10-17 10:51:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:51:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-10-17 10:51:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4086 backedges. 245 proven. 607 refuted. 0 times theorem prover too weak. 3234 trivial. 0 not checked. [2022-10-17 10:51:42,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:42,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232141392] [2022-10-17 10:51:42,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232141392] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:42,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043910710] [2022-10-17 10:51:42,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:51:42,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:42,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:42,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:42,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:51:42,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-10-17 10:51:42,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:51:42,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:51:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4086 backedges. 726 proven. 42 refuted. 0 times theorem prover too weak. 3318 trivial. 0 not checked. [2022-10-17 10:51:43,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4086 backedges. 726 proven. 43 refuted. 0 times theorem prover too weak. 3317 trivial. 0 not checked. [2022-10-17 10:51:44,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043910710] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:44,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:44,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 26 [2022-10-17 10:51:44,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696138509] [2022-10-17 10:51:44,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:44,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-17 10:51:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-17 10:51:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:51:44,345 INFO L87 Difference]: Start difference. First operand 145 states and 224 transitions. Second operand has 26 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 15 states have call successors, (26), 1 states have call predecessors, (26), 9 states have return successors, (32), 16 states have call predecessors, (32), 15 states have call successors, (32) [2022-10-17 10:51:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:44,773 INFO L93 Difference]: Finished difference Result 308 states and 520 transitions. [2022-10-17 10:51:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-17 10:51:44,774 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 15 states have call successors, (26), 1 states have call predecessors, (26), 9 states have return successors, (32), 16 states have call predecessors, (32), 15 states have call successors, (32) Word has length 378 [2022-10-17 10:51:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:44,777 INFO L225 Difference]: With dead ends: 308 [2022-10-17 10:51:44,777 INFO L226 Difference]: Without dead ends: 168 [2022-10-17 10:51:44,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 849 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2022-10-17 10:51:44,780 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 91 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:44,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 246 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:51:44,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-10-17 10:51:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2022-10-17 10:51:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 112 states have internal predecessors, (132), 32 states have call successors, (32), 24 states have call predecessors, (32), 16 states have return successors, (79), 28 states have call predecessors, (79), 32 states have call successors, (79) [2022-10-17 10:51:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 243 transitions. [2022-10-17 10:51:44,797 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 243 transitions. Word has length 378 [2022-10-17 10:51:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:44,797 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 243 transitions. [2022-10-17 10:51:44,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 15 states have call successors, (26), 1 states have call predecessors, (26), 9 states have return successors, (32), 16 states have call predecessors, (32), 15 states have call successors, (32) [2022-10-17 10:51:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 243 transitions. [2022-10-17 10:51:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2022-10-17 10:51:44,813 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:44,814 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 42, 42, 37, 34, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 16, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:44,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:45,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:51:45,038 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1952053737, now seen corresponding path program 4 times [2022-10-17 10:51:45,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:45,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820606882] [2022-10-17 10:51:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:45,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:46,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:51:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:46,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:51:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-10-17 10:51:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-10-17 10:51:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:51:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-10-17 10:51:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2022-10-17 10:51:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:51:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-10-17 10:51:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-10-17 10:51:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:51:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:51:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-10-17 10:51:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:47,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:48,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:51:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:48,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:51:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:48,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:51:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:51:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10395 backedges. 367 proven. 1344 refuted. 0 times theorem prover too weak. 8684 trivial. 0 not checked. [2022-10-17 10:51:48,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:51:48,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820606882] [2022-10-17 10:51:48,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820606882] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:51:48,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380160732] [2022-10-17 10:51:48,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:51:48,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:48,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:51:48,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:51:48,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:51:48,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:51:48,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:51:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:51:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:51:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10395 backedges. 4111 proven. 176 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2022-10-17 10:51:48,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:51:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10395 backedges. 342 proven. 1742 refuted. 0 times theorem prover too weak. 8311 trivial. 0 not checked. [2022-10-17 10:51:51,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380160732] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:51:51,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:51:51,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 19] total 31 [2022-10-17 10:51:51,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008696432] [2022-10-17 10:51:51,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:51:51,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-10-17 10:51:51,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:51:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-10-17 10:51:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-10-17 10:51:51,450 INFO L87 Difference]: Start difference. First operand 165 states and 243 transitions. Second operand has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 25 states have call successors, (36), 2 states have call predecessors, (36), 11 states have return successors, (43), 15 states have call predecessors, (43), 25 states have call successors, (43) [2022-10-17 10:51:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:51:51,960 INFO L93 Difference]: Finished difference Result 338 states and 521 transitions. [2022-10-17 10:51:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-17 10:51:51,961 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 25 states have call successors, (36), 2 states have call predecessors, (36), 11 states have return successors, (43), 15 states have call predecessors, (43), 25 states have call successors, (43) Word has length 597 [2022-10-17 10:51:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:51:51,964 INFO L225 Difference]: With dead ends: 338 [2022-10-17 10:51:51,964 INFO L226 Difference]: Without dead ends: 180 [2022-10-17 10:51:51,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1392 GetRequests, 1345 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=1283, Unknown=0, NotChecked=0, Total=1560 [2022-10-17 10:51:51,967 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 70 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:51:51,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 303 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:51:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-10-17 10:51:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2022-10-17 10:51:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 124 states have (on average 1.096774193548387) internal successors, (136), 119 states have internal predecessors, (136), 34 states have call successors, (34), 27 states have call predecessors, (34), 16 states have return successors, (83), 28 states have call predecessors, (83), 34 states have call successors, (83) [2022-10-17 10:51:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 253 transitions. [2022-10-17 10:51:51,985 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 253 transitions. Word has length 597 [2022-10-17 10:51:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:51:51,986 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 253 transitions. [2022-10-17 10:51:51,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 25 states have call successors, (36), 2 states have call predecessors, (36), 11 states have return successors, (43), 15 states have call predecessors, (43), 25 states have call successors, (43) [2022-10-17 10:51:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 253 transitions. [2022-10-17 10:51:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-10-17 10:51:51,991 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:51:51,991 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 32, 32, 28, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:51:52,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:51:52,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e437bc5a-aff6-40ea-b8fd-305de8508d1f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:51:52,218 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:51:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:51:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash 517738603, now seen corresponding path program 5 times [2022-10-17 10:51:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:51:52,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766826412] [2022-10-17 10:51:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:51:52,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:51:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat