./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.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_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/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_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/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_c390f1d6-6770-4e77-93d0-3cd271ff75db/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 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce --- 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 10:31:27,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:31:27,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:31:27,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:31:27,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:31:27,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:31:27,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:31:27,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:31:27,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:31:27,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:31:27,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:31:27,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:31:27,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:31:27,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:31:27,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:31:27,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:31:27,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:31:27,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:31:27,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:31:27,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:31:27,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:31:27,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:31:27,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:31:27,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:31:27,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:31:27,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:31:27,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:31:27,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:31:27,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:31:27,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:31:27,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:31:27,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:31:27,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:31:27,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:31:27,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:31:27,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:31:27,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:31:27,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:31:27,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:31:27,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:31:27,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:31:27,324 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:31:27,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:31:27,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:31:27,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:31:27,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:31:27,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:31:27,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:31:27,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:31:27,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:31:27,379 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:31:27,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:31:27,381 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:31:27,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:31:27,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:31:27,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:31:27,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:31:27,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:31:27,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:31:27,383 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:31:27,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:31:27,383 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:31:27,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:31:27,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:31:27,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:31:27,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:31:27,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:31:27,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:31:27,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:31:27,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:31:27,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:31:27,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:31:27,387 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:31:27,387 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:31:27,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:31:27,387 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_c390f1d6-6770-4e77-93d0-3cd271ff75db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce [2022-10-17 10:31:27,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:31:27,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:31:27,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:31:27,755 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:31:27,756 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:31:27,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2022-10-17 10:31:27,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/data/f69709285/5d7afdfe48804da98bf7c2dff52c2665/FLAG6323a9579 [2022-10-17 10:31:28,397 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:31:28,398 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2022-10-17 10:31:28,417 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/data/f69709285/5d7afdfe48804da98bf7c2dff52c2665/FLAG6323a9579 [2022-10-17 10:31:28,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/data/f69709285/5d7afdfe48804da98bf7c2dff52c2665 [2022-10-17 10:31:28,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:31:28,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:31:28,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:31:28,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:31:28,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:31:28,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:31:28" (1/1) ... [2022-10-17 10:31:28,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667b9460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:28, skipping insertion in model container [2022-10-17 10:31:28,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:31:28" (1/1) ... [2022-10-17 10:31:28,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:31:28,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:31:29,070 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_c390f1d6-6770-4e77-93d0-3cd271ff75db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c[913,926] [2022-10-17 10:31:29,160 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_c390f1d6-6770-4e77-93d0-3cd271ff75db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c[5977,5990] [2022-10-17 10:31:29,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:31:29,411 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:31:29,428 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_c390f1d6-6770-4e77-93d0-3cd271ff75db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c[913,926] [2022-10-17 10:31:29,461 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_c390f1d6-6770-4e77-93d0-3cd271ff75db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c[5977,5990] [2022-10-17 10:31:29,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:31:29,604 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:31:29,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29 WrapperNode [2022-10-17 10:31:29,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:31:29,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:31:29,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:31:29,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:31:29,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,712 INFO L138 Inliner]: procedures = 72, calls = 85, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1058 [2022-10-17 10:31:29,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:31:29,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:31:29,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:31:29,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:31:29,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,826 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:31:29,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:31:29,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:31:29,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:31:29,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (1/1) ... [2022-10-17 10:31:29,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:31:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:29,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:31:29,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:31:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:31:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 10:31:29,955 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 10:31:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-10-17 10:31:29,955 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-10-17 10:31:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-10-17 10:31:29,956 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-10-17 10:31:29,956 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-10-17 10:31:29,956 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-10-17 10:31:29,956 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-10-17 10:31:29,956 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-10-17 10:31:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-10-17 10:31:29,957 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-10-17 10:31:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-10-17 10:31:29,957 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-10-17 10:31:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:31:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-10-17 10:31:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-10-17 10:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:31:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-10-17 10:31:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-10-17 10:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-10-17 10:31:29,959 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-10-17 10:31:30,117 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:31:30,119 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:31:31,308 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:31:31,331 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:31:31,331 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-10-17 10:31:31,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:31:31 BoogieIcfgContainer [2022-10-17 10:31:31,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:31:31,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:31:31,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:31:31,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:31:31,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:31:28" (1/3) ... [2022-10-17 10:31:31,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb87b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:31:31, skipping insertion in model container [2022-10-17 10:31:31,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:29" (2/3) ... [2022-10-17 10:31:31,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb87b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:31:31, skipping insertion in model container [2022-10-17 10:31:31,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:31:31" (3/3) ... [2022-10-17 10:31:31,347 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.14.cil.c [2022-10-17 10:31:31,371 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:31:31,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 10:31:31,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:31:31,481 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;@1b4b0078, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:31:31,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 10:31:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-10-17 10:31:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 10:31:31,505 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:31,505 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] [2022-10-17 10:31:31,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2140149972, now seen corresponding path program 1 times [2022-10-17 10:31:31,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944904184] [2022-10-17 10:31:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:31,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:31,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-17 10:31:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:32,027 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 10:31:32,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:32,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944904184] [2022-10-17 10:31:32,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944904184] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:32,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:32,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235379012] [2022-10-17 10:31:32,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:32,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:32,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:32,089 INFO L87 Difference]: Start difference. First operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:31:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:32,665 INFO L93 Difference]: Finished difference Result 964 states and 1568 transitions. [2022-10-17 10:31:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-10-17 10:31:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:32,695 INFO L225 Difference]: With dead ends: 964 [2022-10-17 10:31:32,695 INFO L226 Difference]: Without dead ends: 519 [2022-10-17 10:31:32,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:31:32,712 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 953 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:32,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1133 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:31:32,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-10-17 10:31:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2022-10-17 10:31:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 462 states have (on average 1.5346320346320346) internal successors, (709), 467 states have internal predecessors, (709), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2022-10-17 10:31:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 787 transitions. [2022-10-17 10:31:32,844 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 787 transitions. Word has length 44 [2022-10-17 10:31:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:32,845 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 787 transitions. [2022-10-17 10:31:32,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:31:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 787 transitions. [2022-10-17 10:31:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:31:32,850 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:32,850 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] [2022-10-17 10:31:32,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:31:32,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:32,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1297015323, now seen corresponding path program 1 times [2022-10-17 10:31:32,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:32,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52251787] [2022-10-17 10:31:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:32,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:32,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:32,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:31:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:33,009 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 10:31:33,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:33,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52251787] [2022-10-17 10:31:33,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52251787] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:33,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:33,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:33,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797905963] [2022-10-17 10:31:33,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:33,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:33,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:33,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:33,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:33,026 INFO L87 Difference]: Start difference. First operand 513 states and 787 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:31:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:33,684 INFO L93 Difference]: Finished difference Result 761 states and 1127 transitions. [2022-10-17 10:31:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-10-17 10:31:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:33,692 INFO L225 Difference]: With dead ends: 761 [2022-10-17 10:31:33,692 INFO L226 Difference]: Without dead ends: 637 [2022-10-17 10:31:33,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:31:33,698 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 369 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:33,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1468 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:31:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-10-17 10:31:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 580. [2022-10-17 10:31:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 523 states have (on average 1.5162523900573615) internal successors, (793), 528 states have internal predecessors, (793), 41 states have call successors, (41), 15 states have call predecessors, (41), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-10-17 10:31:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 877 transitions. [2022-10-17 10:31:33,789 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 877 transitions. Word has length 45 [2022-10-17 10:31:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:33,791 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 877 transitions. [2022-10-17 10:31:33,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:31:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 877 transitions. [2022-10-17 10:31:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:31:33,804 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:33,805 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] [2022-10-17 10:31:33,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:31:33,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1713594512, now seen corresponding path program 1 times [2022-10-17 10:31:33,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:33,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045396376] [2022-10-17 10:31:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:33,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:33,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:33,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:31:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:33,918 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 10:31:33,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:33,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045396376] [2022-10-17 10:31:33,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045396376] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:33,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:33,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170219428] [2022-10-17 10:31:33,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:33,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:33,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:33,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:33,926 INFO L87 Difference]: Start difference. First operand 580 states and 877 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:31:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:34,211 INFO L93 Difference]: Finished difference Result 988 states and 1436 transitions. [2022-10-17 10:31:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:34,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-10-17 10:31:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:34,220 INFO L225 Difference]: With dead ends: 988 [2022-10-17 10:31:34,220 INFO L226 Difference]: Without dead ends: 797 [2022-10-17 10:31:34,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:31:34,232 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 962 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:34,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1135 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:31:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-10-17 10:31:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 745. [2022-10-17 10:31:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 669 states have (on average 1.4693572496263079) internal successors, (983), 677 states have internal predecessors, (983), 52 states have call successors, (52), 22 states have call predecessors, (52), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2022-10-17 10:31:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1095 transitions. [2022-10-17 10:31:34,340 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1095 transitions. Word has length 45 [2022-10-17 10:31:34,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:34,341 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1095 transitions. [2022-10-17 10:31:34,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:31:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1095 transitions. [2022-10-17 10:31:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 10:31:34,344 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:34,344 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:31:34,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:31:34,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1877488540, now seen corresponding path program 1 times [2022-10-17 10:31:34,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:34,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843509746] [2022-10-17 10:31:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:34,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:34,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:34,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 10:31:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-17 10:31:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:31:34,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:34,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843509746] [2022-10-17 10:31:34,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843509746] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:34,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:34,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:34,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693585667] [2022-10-17 10:31:34,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:34,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:34,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:34,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:34,476 INFO L87 Difference]: Start difference. First operand 745 states and 1095 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:31:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:35,062 INFO L93 Difference]: Finished difference Result 1329 states and 1880 transitions. [2022-10-17 10:31:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:35,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-10-17 10:31:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:35,072 INFO L225 Difference]: With dead ends: 1329 [2022-10-17 10:31:35,072 INFO L226 Difference]: Without dead ends: 973 [2022-10-17 10:31:35,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:31:35,075 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 353 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:35,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1523 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:31:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-10-17 10:31:35,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 935. [2022-10-17 10:31:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 835 states have (on average 1.4167664670658682) internal successors, (1183), 845 states have internal predecessors, (1183), 66 states have call successors, (66), 30 states have call predecessors, (66), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2022-10-17 10:31:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1333 transitions. [2022-10-17 10:31:35,184 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1333 transitions. Word has length 62 [2022-10-17 10:31:35,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:35,185 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 1333 transitions. [2022-10-17 10:31:35,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:31:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1333 transitions. [2022-10-17 10:31:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-17 10:31:35,188 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:35,188 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:31:35,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:31:35,189 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1022869652, now seen corresponding path program 1 times [2022-10-17 10:31:35,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:35,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278352528] [2022-10-17 10:31:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:35,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:35,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:35,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:31:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-10-17 10:31:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 10:31:35,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:35,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278352528] [2022-10-17 10:31:35,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278352528] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:35,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:35,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:35,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710689386] [2022-10-17 10:31:35,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:35,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:35,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:35,273 INFO L87 Difference]: Start difference. First operand 935 states and 1333 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:31:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:35,555 INFO L93 Difference]: Finished difference Result 1588 states and 2186 transitions. [2022-10-17 10:31:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:35,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-10-17 10:31:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:35,565 INFO L225 Difference]: With dead ends: 1588 [2022-10-17 10:31:35,565 INFO L226 Difference]: Without dead ends: 1134 [2022-10-17 10:31:35,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:31:35,569 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 949 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:35,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 1132 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:31:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-10-17 10:31:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1079. [2022-10-17 10:31:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 963 states have (on average 1.3852544132917965) internal successors, (1334), 975 states have internal predecessors, (1334), 74 states have call successors, (74), 36 states have call predecessors, (74), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2022-10-17 10:31:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1506 transitions. [2022-10-17 10:31:35,680 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1506 transitions. Word has length 67 [2022-10-17 10:31:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:35,680 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1506 transitions. [2022-10-17 10:31:35,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:31:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1506 transitions. [2022-10-17 10:31:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-17 10:31:35,683 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:35,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:35,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:31:35,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:35,685 INFO L85 PathProgramCache]: Analyzing trace with hash 604966393, now seen corresponding path program 1 times [2022-10-17 10:31:35,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:35,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331622731] [2022-10-17 10:31:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:35,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:35,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:35,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:35,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:31:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:31:35,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:35,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331622731] [2022-10-17 10:31:35,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331622731] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:35,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144280206] [2022-10-17 10:31:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:35,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:35,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:35,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:35,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:31:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:31:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:36,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:31:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:31:36,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144280206] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:36,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:31:36,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-10-17 10:31:36,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17001608] [2022-10-17 10:31:36,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:36,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:36,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:31:36,349 INFO L87 Difference]: Start difference. First operand 1079 states and 1506 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:31:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:36,636 INFO L93 Difference]: Finished difference Result 1135 states and 1574 transitions. [2022-10-17 10:31:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:31:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-10-17 10:31:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:36,646 INFO L225 Difference]: With dead ends: 1135 [2022-10-17 10:31:36,646 INFO L226 Difference]: Without dead ends: 1132 [2022-10-17 10:31:36,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:31:36,648 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 1271 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:36,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1271 Valid, 788 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:31:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-10-17 10:31:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1078. [2022-10-17 10:31:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 963 states have (on average 1.3831775700934579) internal successors, (1332), 974 states have internal predecessors, (1332), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2022-10-17 10:31:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1503 transitions. [2022-10-17 10:31:36,753 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1503 transitions. Word has length 68 [2022-10-17 10:31:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:36,754 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 1503 transitions. [2022-10-17 10:31:36,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:31:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1503 transitions. [2022-10-17 10:31:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-10-17 10:31:36,757 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:36,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:36,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:36,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:36,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1572679607, now seen corresponding path program 1 times [2022-10-17 10:31:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:36,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056815871] [2022-10-17 10:31:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:36,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:37,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:37,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:37,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:31:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:31:37,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056815871] [2022-10-17 10:31:37,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056815871] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349850295] [2022-10-17 10:31:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:37,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:37,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:37,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:31:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:31:37,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:37,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:31:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:31:37,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349850295] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:31:37,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:31:37,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-10-17 10:31:37,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584453851] [2022-10-17 10:31:37,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:31:37,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:31:37,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:31:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:31:37,879 INFO L87 Difference]: Start difference. First operand 1078 states and 1503 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-10-17 10:31:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:40,067 INFO L93 Difference]: Finished difference Result 2778 states and 3723 transitions. [2022-10-17 10:31:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-10-17 10:31:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-10-17 10:31:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:40,084 INFO L225 Difference]: With dead ends: 2778 [2022-10-17 10:31:40,085 INFO L226 Difference]: Without dead ends: 2234 [2022-10-17 10:31:40,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-10-17 10:31:40,091 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 1316 mSDsluCounter, 3063 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 3889 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:40,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 3889 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-10-17 10:31:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2022-10-17 10:31:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1467. [2022-10-17 10:31:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1313 states have (on average 1.345011424219345) internal successors, (1766), 1332 states have internal predecessors, (1766), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2022-10-17 10:31:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1991 transitions. [2022-10-17 10:31:40,317 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1991 transitions. Word has length 69 [2022-10-17 10:31:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:40,317 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 1991 transitions. [2022-10-17 10:31:40,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-10-17 10:31:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1991 transitions. [2022-10-17 10:31:40,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-10-17 10:31:40,323 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:40,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:40,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:40,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:40,543 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:40,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:40,544 INFO L85 PathProgramCache]: Analyzing trace with hash 498798882, now seen corresponding path program 1 times [2022-10-17 10:31:40,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:40,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874837983] [2022-10-17 10:31:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:40,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:40,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:40,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:40,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-17 10:31:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:40,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-10-17 10:31:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 10:31:40,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:40,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874837983] [2022-10-17 10:31:40,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874837983] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:40,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414828903] [2022-10-17 10:31:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:40,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:40,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:40,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:40,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:31:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:40,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:31:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:31:40,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:40,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414828903] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:40,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:40,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 10:31:40,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386717921] [2022-10-17 10:31:40,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:40,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:31:40,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:31:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:40,932 INFO L87 Difference]: Start difference. First operand 1467 states and 1991 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 10:31:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:41,087 INFO L93 Difference]: Finished difference Result 2190 states and 2929 transitions. [2022-10-17 10:31:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:31:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-10-17 10:31:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:41,097 INFO L225 Difference]: With dead ends: 2190 [2022-10-17 10:31:41,098 INFO L226 Difference]: Without dead ends: 1345 [2022-10-17 10:31:41,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:41,101 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 656 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:41,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 802 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:31:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-10-17 10:31:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1330. [2022-10-17 10:31:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1192 states have (on average 1.348993288590604) internal successors, (1608), 1210 states have internal predecessors, (1608), 85 states have call successors, (85), 44 states have call predecessors, (85), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2022-10-17 10:31:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1811 transitions. [2022-10-17 10:31:41,252 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1811 transitions. Word has length 88 [2022-10-17 10:31:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:41,252 INFO L495 AbstractCegarLoop]: Abstraction has 1330 states and 1811 transitions. [2022-10-17 10:31:41,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 10:31:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1811 transitions. [2022-10-17 10:31:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-10-17 10:31:41,257 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:41,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:41,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:41,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:31:41,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1813831709, now seen corresponding path program 1 times [2022-10-17 10:31:41,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:41,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673547101] [2022-10-17 10:31:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:41,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:41,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:41,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-10-17 10:31:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:41,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-10-17 10:31:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:41,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-17 10:31:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 10:31:41,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673547101] [2022-10-17 10:31:41,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673547101] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:41,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103055238] [2022-10-17 10:31:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:41,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:41,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:41,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:31:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:41,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:31:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:31:41,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:41,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103055238] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:41,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:41,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 10:31:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787505801] [2022-10-17 10:31:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:41,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:31:41,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:31:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:41,878 INFO L87 Difference]: Start difference. First operand 1330 states and 1811 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-17 10:31:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:41,990 INFO L93 Difference]: Finished difference Result 1709 states and 2279 transitions. [2022-10-17 10:31:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:31:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-10-17 10:31:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:41,994 INFO L225 Difference]: With dead ends: 1709 [2022-10-17 10:31:41,994 INFO L226 Difference]: Without dead ends: 383 [2022-10-17 10:31:41,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:41,998 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 62 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:41,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1412 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:31:42,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-10-17 10:31:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-10-17 10:31:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5804597701149425) internal successors, (550), 350 states have internal predecessors, (550), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-10-17 10:31:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 604 transitions. [2022-10-17 10:31:42,027 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 604 transitions. Word has length 103 [2022-10-17 10:31:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:42,028 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 604 transitions. [2022-10-17 10:31:42,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-17 10:31:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 604 transitions. [2022-10-17 10:31:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-10-17 10:31:42,030 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:42,030 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 10:31:42,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:42,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c390f1d6-6770-4e77-93d0-3cd271ff75db/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:42,254 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:42,254 INFO L85 PathProgramCache]: Analyzing trace with hash -659936082, now seen corresponding path program 1 times [2022-10-17 10:31:42,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:42,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858878854] [2022-10-17 10:31:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:42,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-10-17 10:31:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-10-17 10:31:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-10-17 10:31:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,505 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 10:31:42,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:42,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858878854] [2022-10-17 10:31:42,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858878854] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:42,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:42,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:31:42,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425169069] [2022-10-17 10:31:42,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:42,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:31:42,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:31:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:31:42,509 INFO L87 Difference]: Start difference. First operand 383 states and 604 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) [2022-10-17 10:31:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:44,581 INFO L93 Difference]: Finished difference Result 901 states and 1444 transitions. [2022-10-17 10:31:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:31:44,582 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 179 [2022-10-17 10:31:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:44,587 INFO L225 Difference]: With dead ends: 901 [2022-10-17 10:31:44,587 INFO L226 Difference]: Without dead ends: 525 [2022-10-17 10:31:44,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:31:44,590 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 1042 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:44,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1066 Valid, 1065 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-10-17 10:31:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-10-17 10:31:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2022-10-17 10:31:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5775862068965518) internal successors, (549), 350 states have internal predecessors, (549), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-10-17 10:31:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 603 transitions. [2022-10-17 10:31:44,723 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 603 transitions. Word has length 179 [2022-10-17 10:31:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:44,724 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 603 transitions. [2022-10-17 10:31:44,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-10-17 10:31:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 603 transitions. [2022-10-17 10:31:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-10-17 10:31:44,727 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:44,727 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 10:31:44,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:31:44,728 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1308528852, now seen corresponding path program 1 times [2022-10-17 10:31:44,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:44,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750230627] [2022-10-17 10:31:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:44,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-10-17 10:31:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-10-17 10:31:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-10-17 10:31:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,976 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 10:31:44,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:44,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750230627] [2022-10-17 10:31:44,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750230627] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:44,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:44,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:31:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066728257] [2022-10-17 10:31:44,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:44,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:31:44,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:31:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:31:44,981 INFO L87 Difference]: Start difference. First operand 383 states and 603 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) [2022-10-17 10:31:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:47,139 INFO L93 Difference]: Finished difference Result 893 states and 1427 transitions. [2022-10-17 10:31:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:31:47,140 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 179 [2022-10-17 10:31:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:47,145 INFO L225 Difference]: With dead ends: 893 [2022-10-17 10:31:47,145 INFO L226 Difference]: Without dead ends: 525 [2022-10-17 10:31:47,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:31:47,148 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 1033 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:47,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 1063 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-17 10:31:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-10-17 10:31:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2022-10-17 10:31:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5747126436781609) internal successors, (548), 350 states have internal predecessors, (548), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-10-17 10:31:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 602 transitions. [2022-10-17 10:31:47,231 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 602 transitions. Word has length 179 [2022-10-17 10:31:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:47,232 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 602 transitions. [2022-10-17 10:31:47,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-10-17 10:31:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 602 transitions. [2022-10-17 10:31:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-10-17 10:31:47,235 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:47,235 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 10:31:47,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:31:47,236 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:47,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1807085654, now seen corresponding path program 1 times [2022-10-17 10:31:47,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:47,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649224869] [2022-10-17 10:31:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:47,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:47,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:47,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-10-17 10:31:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:47,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:47,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-10-17 10:31:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:47,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-10-17 10:31:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:47,581 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 10:31:47,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:47,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649224869] [2022-10-17 10:31:47,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649224869] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:47,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:47,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:31:47,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352533702] [2022-10-17 10:31:47,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:47,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:31:47,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:47,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:31:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:31:47,587 INFO L87 Difference]: Start difference. First operand 383 states and 602 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:51,509 INFO L93 Difference]: Finished difference Result 1409 states and 2265 transitions. [2022-10-17 10:31:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:31:51,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-10-17 10:31:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:51,517 INFO L225 Difference]: With dead ends: 1409 [2022-10-17 10:31:51,517 INFO L226 Difference]: Without dead ends: 1047 [2022-10-17 10:31:51,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:31:51,520 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 1564 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:51,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 1683 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-10-17 10:31:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-10-17 10:31:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 762. [2022-10-17 10:31:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 699 states have (on average 1.5879828326180256) internal successors, (1110), 702 states have internal predecessors, (1110), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2022-10-17 10:31:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1209 transitions. [2022-10-17 10:31:51,667 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1209 transitions. Word has length 179 [2022-10-17 10:31:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:51,667 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 1209 transitions. [2022-10-17 10:31:51,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1209 transitions. [2022-10-17 10:31:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-10-17 10:31:51,670 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:51,671 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 10:31:51,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:31:51,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash -826130840, now seen corresponding path program 1 times [2022-10-17 10:31:51,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:51,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839510470] [2022-10-17 10:31:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:51,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:51,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-10-17 10:31:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-10-17 10:31:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-10-17 10:31:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,053 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 10:31:52,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839510470] [2022-10-17 10:31:52,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839510470] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:52,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:52,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:31:52,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482738811] [2022-10-17 10:31:52,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:52,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:52,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:52,056 INFO L87 Difference]: Start difference. First operand 762 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)