./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-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_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/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_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/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_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/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 54640fbb6743a38bf41f3a8b2318fcad885a58c92146d7845af619d355e32c56 --- 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 10:18:38,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:18:38,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:18:38,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:18:38,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:18:38,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:18:38,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:18:38,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:18:39,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:18:39,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:18:39,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:18:39,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:18:39,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:18:39,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:18:39,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:18:39,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:18:39,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:18:39,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:18:39,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:18:39,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:18:39,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:18:39,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:18:39,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:18:39,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:18:39,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:18:39,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:18:39,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:18:39,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:18:39,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:18:39,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:18:39,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:18:39,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:18:39,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:18:39,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:18:39,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:18:39,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:18:39,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:18:39,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:18:39,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:18:39,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:18:39,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:18:39,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:18:39,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:18:39,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:18:39,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:18:39,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:18:39,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:18:39,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:18:39,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:18:39,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:18:39,141 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:18:39,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:18:39,142 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:18:39,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:18:39,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:18:39,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:18:39,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:18:39,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:18:39,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:18:39,144 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:18:39,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:18:39,144 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:18:39,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:18:39,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:18:39,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:18:39,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:18:39,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:18:39,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:18:39,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:18:39,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:18:39,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:18:39,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:18:39,148 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:18:39,148 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:18:39,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:18:39,149 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_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54640fbb6743a38bf41f3a8b2318fcad885a58c92146d7845af619d355e32c56 [2022-10-17 10:18:39,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:18:39,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:18:39,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:18:39,511 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:18:39,511 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:18:39,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c [2022-10-17 10:18:39,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/data/1db926e80/ce490d31ddf546e6bfc5dba9a095f950/FLAG82b026cc4 [2022-10-17 10:18:40,227 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:18:40,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c [2022-10-17 10:18:40,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/data/1db926e80/ce490d31ddf546e6bfc5dba9a095f950/FLAG82b026cc4 [2022-10-17 10:18:40,433 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/data/1db926e80/ce490d31ddf546e6bfc5dba9a095f950 [2022-10-17 10:18:40,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:18:40,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:18:40,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:18:40,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:18:40,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:18:40,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:18:40" (1/1) ... [2022-10-17 10:18:40,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@605f80d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:40, skipping insertion in model container [2022-10-17 10:18:40,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:18:40" (1/1) ... [2022-10-17 10:18:40,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:18:40,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:18:40,802 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_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[911,924] [2022-10-17 10:18:40,927 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_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[8416,8429] [2022-10-17 10:18:41,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:18:41,117 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:18:41,130 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_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[911,924] [2022-10-17 10:18:41,148 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_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[8416,8429] [2022-10-17 10:18:41,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:18:41,230 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:18:41,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41 WrapperNode [2022-10-17 10:18:41,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:18:41,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:18:41,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:18:41,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:18:41,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,324 INFO L138 Inliner]: procedures = 79, calls = 98, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1083 [2022-10-17 10:18:41,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:18:41,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:18:41,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:18:41,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:18:41,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,388 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:18:41,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:18:41,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:18:41,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:18:41,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (1/1) ... [2022-10-17 10:18:41,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:18:41,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:41,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:18:41,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:18:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:18:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 10:18:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 10:18:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-10-17 10:18:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-10-17 10:18:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-10-17 10:18:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-10-17 10:18:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-10-17 10:18:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-10-17 10:18:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-10-17 10:18:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-10-17 10:18:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-10-17 10:18:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-10-17 10:18:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-10-17 10:18:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-10-17 10:18:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-10-17 10:18:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-10-17 10:18:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-10-17 10:18:41,552 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-10-17 10:18:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-10-17 10:18:41,552 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-10-17 10:18:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-10-17 10:18:41,552 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-10-17 10:18:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:18:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-10-17 10:18:41,553 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-10-17 10:18:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-10-17 10:18:41,553 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-10-17 10:18:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:18:41,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:18:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-10-17 10:18:41,554 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-10-17 10:18:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-10-17 10:18:41,554 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-10-17 10:18:41,776 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:18:41,779 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:18:42,856 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-10-17 10:18:42,856 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-10-17 10:18:42,945 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:18:42,966 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:18:42,967 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-10-17 10:18:42,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:18:42 BoogieIcfgContainer [2022-10-17 10:18:42,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:18:42,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:18:42,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:18:42,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:18:42,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:18:40" (1/3) ... [2022-10-17 10:18:42,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55871328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:18:42, skipping insertion in model container [2022-10-17 10:18:42,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:41" (2/3) ... [2022-10-17 10:18:42,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55871328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:18:42, skipping insertion in model container [2022-10-17 10:18:42,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:18:42" (3/3) ... [2022-10-17 10:18:42,982 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.12.cil-1.c [2022-10-17 10:18:43,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:18:43,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 10:18:43,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:18:43,097 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;@789b32b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:18:43,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 10:18:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 507 states, 445 states have (on average 1.6426966292134833) internal successors, (731), 453 states have internal predecessors, (731), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-10-17 10:18:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:18:43,119 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:18:43,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:43,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:18:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash -813497817, now seen corresponding path program 1 times [2022-10-17 10:18:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538016467] [2022-10-17 10:18:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:43,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:18:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:43,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:18:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:43,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:18:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:43,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:18:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:43,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:18:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:43,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 10:18:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:43,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 10:18:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:43,657 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 10:18:43,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:43,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538016467] [2022-10-17 10:18:43,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538016467] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:43,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:43,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:18:43,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623577796] [2022-10-17 10:18:43,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:43,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:18:43,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:43,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:18:43,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:18:43,725 INFO L87 Difference]: Start difference. First operand has 507 states, 445 states have (on average 1.6426966292134833) internal successors, (731), 453 states have internal predecessors, (731), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 10:18:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:18:44,848 INFO L93 Difference]: Finished difference Result 1003 states and 1618 transitions. [2022-10-17 10:18:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:18:44,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-10-17 10:18:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:18:44,889 INFO L225 Difference]: With dead ends: 1003 [2022-10-17 10:18:44,890 INFO L226 Difference]: Without dead ends: 514 [2022-10-17 10:18:44,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:18:44,906 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 1108 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:18:44,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 1792 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 10:18:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-10-17 10:18:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 496. [2022-10-17 10:18:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 437 states have (on average 1.5560640732265447) internal successors, (680), 442 states have internal predecessors, (680), 44 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-10-17 10:18:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 764 transitions. [2022-10-17 10:18:45,036 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 764 transitions. Word has length 65 [2022-10-17 10:18:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:18:45,037 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 764 transitions. [2022-10-17 10:18:45,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 10:18:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 764 transitions. [2022-10-17 10:18:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:18:45,049 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:18:45,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:45,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:18:45,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:18:45,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:45,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2094684069, now seen corresponding path program 1 times [2022-10-17 10:18:45,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:45,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956078274] [2022-10-17 10:18:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:45,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:45,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:18:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:45,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:18:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:45,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:18:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:18:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:45,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:18:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:45,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 10:18:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:45,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 10:18:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:45,369 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 10:18:45,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956078274] [2022-10-17 10:18:45,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956078274] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:45,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:45,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:18:45,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127906018] [2022-10-17 10:18:45,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:45,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:18:45,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:45,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:18:45,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:18:45,373 INFO L87 Difference]: Start difference. First operand 496 states and 764 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 10:18:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:18:46,803 INFO L93 Difference]: Finished difference Result 751 states and 1133 transitions. [2022-10-17 10:18:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:18:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-10-17 10:18:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:18:46,810 INFO L225 Difference]: With dead ends: 751 [2022-10-17 10:18:46,810 INFO L226 Difference]: Without dead ends: 647 [2022-10-17 10:18:46,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:18:46,813 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 899 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:18:46,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 2555 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-17 10:18:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-10-17 10:18:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 608. [2022-10-17 10:18:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 527 states have (on average 1.5294117647058822) internal successors, (806), 534 states have internal predecessors, (806), 57 states have call successors, (57), 22 states have call predecessors, (57), 22 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2022-10-17 10:18:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 921 transitions. [2022-10-17 10:18:46,881 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 921 transitions. Word has length 65 [2022-10-17 10:18:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:18:46,882 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 921 transitions. [2022-10-17 10:18:46,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 10:18:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 921 transitions. [2022-10-17 10:18:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:18:46,886 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:18:46,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:46,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:18:46,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:18:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:46,887 INFO L85 PathProgramCache]: Analyzing trace with hash -521394587, now seen corresponding path program 1 times [2022-10-17 10:18:46,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:46,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284521481] [2022-10-17 10:18:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:46,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:47,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:18:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:47,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:18:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:47,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:18:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:47,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:18:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:47,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:18:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:47,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 10:18:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:47,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 10:18:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:47,141 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 10:18:47,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:47,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284521481] [2022-10-17 10:18:47,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284521481] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:47,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:47,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:18:47,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427103276] [2022-10-17 10:18:47,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:47,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:18:47,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:18:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:18:47,146 INFO L87 Difference]: Start difference. First operand 608 states and 921 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 10:18:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:18:48,673 INFO L93 Difference]: Finished difference Result 1005 states and 1486 transitions. [2022-10-17 10:18:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:18:48,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-10-17 10:18:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:18:48,682 INFO L225 Difference]: With dead ends: 1005 [2022-10-17 10:18:48,682 INFO L226 Difference]: Without dead ends: 796 [2022-10-17 10:18:48,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:18:48,685 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 1479 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:18:48,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1513 Valid, 2947 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-17 10:18:48,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-10-17 10:18:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 720. [2022-10-17 10:18:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 617 states have (on average 1.5089141004862237) internal successors, (931), 626 states have internal predecessors, (931), 70 states have call successors, (70), 29 states have call predecessors, (70), 31 states have return successors, (79), 68 states have call predecessors, (79), 66 states have call successors, (79) [2022-10-17 10:18:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1080 transitions. [2022-10-17 10:18:48,773 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1080 transitions. Word has length 65 [2022-10-17 10:18:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:18:48,774 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 1080 transitions. [2022-10-17 10:18:48,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 10:18:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1080 transitions. [2022-10-17 10:18:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:18:48,777 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:18:48,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:48,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:18:48,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:18:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1744986599, now seen corresponding path program 1 times [2022-10-17 10:18:48,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:48,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973449676] [2022-10-17 10:18:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:48,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:48,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:18:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:48,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:18:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:48,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:18:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:49,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:18:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:49,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:18:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:49,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 10:18:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:49,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 10:18:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:49,028 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 10:18:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973449676] [2022-10-17 10:18:49,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973449676] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:49,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:49,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:18:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699720930] [2022-10-17 10:18:49,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:49,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:18:49,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:18:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:18:49,033 INFO L87 Difference]: Start difference. First operand 720 states and 1080 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 10:18:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:18:51,686 INFO L93 Difference]: Finished difference Result 2266 states and 3277 transitions. [2022-10-17 10:18:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-10-17 10:18:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2022-10-17 10:18:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:18:51,700 INFO L225 Difference]: With dead ends: 2266 [2022-10-17 10:18:51,700 INFO L226 Difference]: Without dead ends: 1933 [2022-10-17 10:18:51,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-10-17 10:18:51,705 INFO L413 NwaCegarLoop]: 894 mSDtfsCounter, 3878 mSDsluCounter, 2400 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3896 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-17 10:18:51,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3896 Valid, 3294 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-17 10:18:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-10-17 10:18:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1773. [2022-10-17 10:18:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1465 states have (on average 1.4177474402730375) internal successors, (2077), 1489 states have internal predecessors, (2077), 180 states have call successors, (180), 112 states have call predecessors, (180), 126 states have return successors, (212), 174 states have call predecessors, (212), 176 states have call successors, (212) [2022-10-17 10:18:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2469 transitions. [2022-10-17 10:18:51,899 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2469 transitions. Word has length 65 [2022-10-17 10:18:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:18:51,900 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2469 transitions. [2022-10-17 10:18:51,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 10:18:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2469 transitions. [2022-10-17 10:18:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-17 10:18:51,902 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:18:51,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:51,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:18:51,903 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:18:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 813039065, now seen corresponding path program 1 times [2022-10-17 10:18:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:51,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224924305] [2022-10-17 10:18:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:51,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:18:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:51,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:18:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:51,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:18:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:52,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:18:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:52,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:18:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:52,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-10-17 10:18:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:52,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-10-17 10:18:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:52,098 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 10:18:52,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:52,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224924305] [2022-10-17 10:18:52,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224924305] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:52,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:52,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:18:52,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510291217] [2022-10-17 10:18:52,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:52,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:18:52,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:18:52,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:18:52,114 INFO L87 Difference]: Start difference. First operand 1773 states and 2469 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 10:18:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:18:53,676 INFO L93 Difference]: Finished difference Result 3301 states and 4548 transitions. [2022-10-17 10:18:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:18:53,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-10-17 10:18:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:18:53,692 INFO L225 Difference]: With dead ends: 3301 [2022-10-17 10:18:53,693 INFO L226 Difference]: Without dead ends: 1921 [2022-10-17 10:18:53,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:18:53,698 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 668 mSDsluCounter, 2609 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:18:53,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 3360 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-17 10:18:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-10-17 10:18:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1813. [2022-10-17 10:18:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1497 states have (on average 1.404809619238477) internal successors, (2103), 1521 states have internal predecessors, (2103), 180 states have call successors, (180), 112 states have call predecessors, (180), 134 states have return successors, (220), 182 states have call predecessors, (220), 176 states have call successors, (220) [2022-10-17 10:18:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2503 transitions. [2022-10-17 10:18:53,864 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2503 transitions. Word has length 66 [2022-10-17 10:18:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:18:53,865 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2503 transitions. [2022-10-17 10:18:53,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 10:18:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2503 transitions. [2022-10-17 10:18:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-17 10:18:53,866 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:18:53,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:53,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:18:53,867 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:18:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash -216320233, now seen corresponding path program 1 times [2022-10-17 10:18:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:53,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761349360] [2022-10-17 10:18:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:53,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:53,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:18:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:53,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:18:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:53,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:18:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:54,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:18:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:54,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:18:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:54,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-10-17 10:18:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:54,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-10-17 10:18:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:54,046 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 10:18:54,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:54,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761349360] [2022-10-17 10:18:54,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761349360] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:54,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:54,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:18:54,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546010724] [2022-10-17 10:18:54,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:54,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:18:54,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:54,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:18:54,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:18:54,052 INFO L87 Difference]: Start difference. First operand 1813 states and 2503 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 10:18:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:18:56,658 INFO L93 Difference]: Finished difference Result 5385 states and 7377 transitions. [2022-10-17 10:18:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-10-17 10:18:56,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2022-10-17 10:18:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:18:56,674 INFO L225 Difference]: With dead ends: 5385 [2022-10-17 10:18:56,674 INFO L226 Difference]: Without dead ends: 2204 [2022-10-17 10:18:56,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-10-17 10:18:56,687 INFO L413 NwaCegarLoop]: 888 mSDtfsCounter, 3952 mSDsluCounter, 2449 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3970 SdHoareTripleChecker+Valid, 3337 SdHoareTripleChecker+Invalid, 2548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:18:56,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3970 Valid, 3337 Invalid, 2548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-17 10:18:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-10-17 10:18:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2024. [2022-10-17 10:18:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 1636 states have (on average 1.3624694376528117) internal successors, (2229), 1662 states have internal predecessors, (2229), 220 states have call successors, (220), 140 states have call predecessors, (220), 166 states have return successors, (266), 224 states have call predecessors, (266), 216 states have call successors, (266) [2022-10-17 10:18:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2715 transitions. [2022-10-17 10:18:56,919 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2715 transitions. Word has length 66 [2022-10-17 10:18:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:18:56,919 INFO L495 AbstractCegarLoop]: Abstraction has 2024 states and 2715 transitions. [2022-10-17 10:18:56,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 10:18:56,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2715 transitions. [2022-10-17 10:18:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 10:18:56,922 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:18:56,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:56,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:18:56,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:18:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:56,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1700315392, now seen corresponding path program 1 times [2022-10-17 10:18:56,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:56,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673496771] [2022-10-17 10:18:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:56,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:56,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:18:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:57,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:18:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:57,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:18:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:57,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:18:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:57,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:18:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:57,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:18:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:57,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:18:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:57,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:18:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:18:57,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:57,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673496771] [2022-10-17 10:18:57,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673496771] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:57,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:57,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:18:57,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728336631] [2022-10-17 10:18:57,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:57,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:18:57,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:57,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:18:57,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:18:57,107 INFO L87 Difference]: Start difference. First operand 2024 states and 2715 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 10:18:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:18:58,695 INFO L93 Difference]: Finished difference Result 3849 states and 5117 transitions. [2022-10-17 10:18:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:18:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2022-10-17 10:18:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:18:58,715 INFO L225 Difference]: With dead ends: 3849 [2022-10-17 10:18:58,715 INFO L226 Difference]: Without dead ends: 2218 [2022-10-17 10:18:58,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:18:58,725 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 989 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 2966 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:18:58,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 2966 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-17 10:18:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-10-17 10:18:58,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2084. [2022-10-17 10:18:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 1684 states have (on average 1.3485748218527316) internal successors, (2271), 1710 states have internal predecessors, (2271), 220 states have call successors, (220), 140 states have call predecessors, (220), 178 states have return successors, (278), 236 states have call predecessors, (278), 216 states have call successors, (278) [2022-10-17 10:18:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2769 transitions. [2022-10-17 10:18:58,965 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2769 transitions. Word has length 91 [2022-10-17 10:18:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:18:58,966 INFO L495 AbstractCegarLoop]: Abstraction has 2084 states and 2769 transitions. [2022-10-17 10:18:58,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 10:18:58,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2769 transitions. [2022-10-17 10:18:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 10:18:58,968 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:18:58,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:58,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:18:58,969 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:18:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2144216066, now seen corresponding path program 1 times [2022-10-17 10:18:58,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:58,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362666983] [2022-10-17 10:18:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:58,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:59,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:18:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:59,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:18:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:59,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:18:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:59,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:18:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:59,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:18:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:59,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:18:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:59,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:18:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:59,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:18:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:18:59,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:59,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362666983] [2022-10-17 10:18:59,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362666983] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:59,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:59,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:18:59,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4972024] [2022-10-17 10:18:59,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:59,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:18:59,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:59,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:18:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:18:59,258 INFO L87 Difference]: Start difference. First operand 2084 states and 2769 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 10:19:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:19:00,744 INFO L93 Difference]: Finished difference Result 3611 states and 4733 transitions. [2022-10-17 10:19:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:19:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-10-17 10:19:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:19:00,765 INFO L225 Difference]: With dead ends: 3611 [2022-10-17 10:19:00,765 INFO L226 Difference]: Without dead ends: 2158 [2022-10-17 10:19:00,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:19:00,771 INFO L413 NwaCegarLoop]: 770 mSDtfsCounter, 1835 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1867 SdHoareTripleChecker+Valid, 2278 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:19:00,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1867 Valid, 2278 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 10:19:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2022-10-17 10:19:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1863. [2022-10-17 10:19:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1516 states have (on average 1.354221635883905) internal successors, (2053), 1537 states have internal predecessors, (2053), 192 states have call successors, (192), 121 states have call predecessors, (192), 153 states have return successors, (238), 206 states have call predecessors, (238), 188 states have call successors, (238) [2022-10-17 10:19:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2483 transitions. [2022-10-17 10:19:00,982 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2483 transitions. Word has length 91 [2022-10-17 10:19:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:19:00,982 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 2483 transitions. [2022-10-17 10:19:00,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 10:19:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2483 transitions. [2022-10-17 10:19:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 10:19:00,985 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:19:00,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:00,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:19:00,985 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:19:00,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -211589184, now seen corresponding path program 1 times [2022-10-17 10:19:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:00,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680271738] [2022-10-17 10:19:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:00,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:19:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:19:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:19:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:19:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:19:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:19:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:19:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:19:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:19:01,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680271738] [2022-10-17 10:19:01,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680271738] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:19:01,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:19:01,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:19:01,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484499745] [2022-10-17 10:19:01,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:19:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:19:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:19:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:19:01,136 INFO L87 Difference]: Start difference. First operand 1863 states and 2483 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 10:19:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:19:01,603 INFO L93 Difference]: Finished difference Result 3439 states and 4539 transitions. [2022-10-17 10:19:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:19:01,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2022-10-17 10:19:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:19:01,617 INFO L225 Difference]: With dead ends: 3439 [2022-10-17 10:19:01,618 INFO L226 Difference]: Without dead ends: 1970 [2022-10-17 10:19:01,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:19:01,625 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1657 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1691 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:19:01,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1691 Valid, 1728 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:19:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-10-17 10:19:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1863. [2022-10-17 10:19:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1516 states have (on average 1.3304749340369393) internal successors, (2017), 1537 states have internal predecessors, (2017), 192 states have call successors, (192), 121 states have call predecessors, (192), 153 states have return successors, (238), 206 states have call predecessors, (238), 188 states have call successors, (238) [2022-10-17 10:19:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2447 transitions. [2022-10-17 10:19:01,822 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2447 transitions. Word has length 91 [2022-10-17 10:19:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:19:01,823 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 2447 transitions. [2022-10-17 10:19:01,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 10:19:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2447 transitions. [2022-10-17 10:19:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-17 10:19:01,825 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:19:01,825 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:01,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:19:01,826 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:19:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash 845704345, now seen corresponding path program 1 times [2022-10-17 10:19:01,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:01,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752587936] [2022-10-17 10:19:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:01,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:19:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:19:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:19:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:19:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:19:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:19:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:01,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:19:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:02,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-10-17 10:19:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:19:02,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:02,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752587936] [2022-10-17 10:19:02,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752587936] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:19:02,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:19:02,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:19:02,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935032016] [2022-10-17 10:19:02,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:19:02,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:19:02,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:19:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:19:02,017 INFO L87 Difference]: Start difference. First operand 1863 states and 2447 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-10-17 10:19:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:19:03,903 INFO L93 Difference]: Finished difference Result 4281 states and 5530 transitions. [2022-10-17 10:19:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-17 10:19:03,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2022-10-17 10:19:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:19:03,920 INFO L225 Difference]: With dead ends: 4281 [2022-10-17 10:19:03,921 INFO L226 Difference]: Without dead ends: 2661 [2022-10-17 10:19:03,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-10-17 10:19:03,927 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 2541 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2584 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:19:03,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2584 Valid, 2733 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 10:19:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2022-10-17 10:19:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 2484. [2022-10-17 10:19:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 1983 states have (on average 1.2904689863842662) internal successors, (2559), 2012 states have internal predecessors, (2559), 269 states have call successors, (269), 169 states have call predecessors, (269), 230 states have return successors, (369), 304 states have call predecessors, (369), 265 states have call successors, (369) [2022-10-17 10:19:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 3197 transitions. [2022-10-17 10:19:04,187 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 3197 transitions. Word has length 92 [2022-10-17 10:19:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:19:04,189 INFO L495 AbstractCegarLoop]: Abstraction has 2484 states and 3197 transitions. [2022-10-17 10:19:04,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-10-17 10:19:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 3197 transitions. [2022-10-17 10:19:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-10-17 10:19:04,196 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:19:04,197 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:04,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:19:04,197 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:19:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:04,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1631747366, now seen corresponding path program 1 times [2022-10-17 10:19:04,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:04,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834339571] [2022-10-17 10:19:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:04,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:19:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:19:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:19:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:19:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:19:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:19:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:19:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-10-17 10:19:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-10-17 10:19:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-17 10:19:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-10-17 10:19:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:19:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:19:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-10-17 10:19:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-10-17 10:19:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-10-17 10:19:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-10-17 10:19:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-10-17 10:19:04,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:04,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834339571] [2022-10-17 10:19:04,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834339571] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:19:04,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032246044] [2022-10-17 10:19:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:04,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:19:04,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:19:04,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:19:04,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:19:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:19:04,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:19:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-10-17 10:19:04,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:19:04,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032246044] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:19:04,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:19:04,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-10-17 10:19:04,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589242371] [2022-10-17 10:19:04,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:19:04,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:19:04,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:19:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:19:04,823 INFO L87 Difference]: Start difference. First operand 2484 states and 3197 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-10-17 10:19:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:19:05,258 INFO L93 Difference]: Finished difference Result 6410 states and 8026 transitions. [2022-10-17 10:19:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:19:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2022-10-17 10:19:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:19:05,285 INFO L225 Difference]: With dead ends: 6410 [2022-10-17 10:19:05,285 INFO L226 Difference]: Without dead ends: 4396 [2022-10-17 10:19:05,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:19:05,292 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 61 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:19:05,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1535 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:19:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4396 states. [2022-10-17 10:19:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4396 to 4354. [2022-10-17 10:19:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3440 states have (on average 1.2537790697674418) internal successors, (4313), 3492 states have internal predecessors, (4313), 476 states have call successors, (476), 330 states have call predecessors, (476), 436 states have return successors, (637), 533 states have call predecessors, (637), 472 states have call successors, (637) [2022-10-17 10:19:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5426 transitions. [2022-10-17 10:19:05,753 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5426 transitions. Word has length 163 [2022-10-17 10:19:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:19:05,753 INFO L495 AbstractCegarLoop]: Abstraction has 4354 states and 5426 transitions. [2022-10-17 10:19:05,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-10-17 10:19:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5426 transitions. [2022-10-17 10:19:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-10-17 10:19:05,760 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:19:05,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:05,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:19:05,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1582097a-cd6d-4823-bdb6-dd5c21bfcd60/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:19:05,975 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:19:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash -370528825, now seen corresponding path program 1 times [2022-10-17 10:19:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:05,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6741992] [2022-10-17 10:19:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:05,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:06,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:19:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:06,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-10-17 10:19:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:06,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:19:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:06,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-10-17 10:19:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:06,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-10-17 10:19:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:06,181 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 10:19:06,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:06,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6741992] [2022-10-17 10:19:06,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6741992] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:19:06,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:19:06,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:19:06,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174410125] [2022-10-17 10:19:06,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:19:06,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:19:06,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:06,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:19:06,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:19:06,185 INFO L87 Difference]: Start difference. First operand 4354 states and 5426 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)