./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --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 64bit --witnessprinter.graph.data.programhash 65cc93bea37c503291576929a444106bffa9d5b7b84b8d294ee7e7120b60ffa5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:11:39,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:11:39,629 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-12 02:11:39,636 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:11:39,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:11:39,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:11:39,677 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:11:39,678 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:11:39,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:11:39,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:11:39,687 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:11:39,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:11:39,688 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:11:39,690 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:11:39,690 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:11:39,691 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:11:39,691 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:11:39,692 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:11:39,692 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:11:39,693 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:11:39,693 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:11:39,693 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:11:39,694 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:11:39,694 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:11:39,695 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:11:39,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:11:39,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:11:39,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:11:39,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:11:39,697 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:11:39,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:11:39,698 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:11:39,699 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:11:39,699 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:11:39,699 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:11:39,699 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:11:39,700 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65cc93bea37c503291576929a444106bffa9d5b7b84b8d294ee7e7120b60ffa5 [2023-11-12 02:11:39,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:11:40,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:11:40,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:11:40,030 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:11:40,031 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:11:40,032 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2023-11-12 02:11:43,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:11:43,837 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:11:43,839 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2023-11-12 02:11:43,889 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/data/db1658f4a/bc4138cf33c74a8fb694bbfca22f2983/FLAG61d60aa09 [2023-11-12 02:11:43,908 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/data/db1658f4a/bc4138cf33c74a8fb694bbfca22f2983 [2023-11-12 02:11:43,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:11:43,918 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:11:43,919 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:43,920 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:11:43,927 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:11:43,927 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:43" (1/1) ... [2023-11-12 02:11:43,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301beab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:43, skipping insertion in model container [2023-11-12 02:11:43,929 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:43" (1/1) ... [2023-11-12 02:11:44,062 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:11:45,378 WARN L240 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_2afee851-e139-43ec-925c-338a61cf9eec/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i[138616,138629] [2023-11-12 02:11:45,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:45,588 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:11:45,904 WARN L240 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_2afee851-e139-43ec-925c-338a61cf9eec/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i[138616,138629] [2023-11-12 02:11:45,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:45,997 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:11:45,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45 WrapperNode [2023-11-12 02:11:45,998 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:46,000 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:46,000 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:11:46,000 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:11:46,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,192 INFO L138 Inliner]: procedures = 161, calls = 847, calls flagged for inlining = 53, calls inlined = 28, statements flattened = 1159 [2023-11-12 02:11:46,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:46,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:11:46,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:11:46,194 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:11:46,205 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,332 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:11:46,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:11:46,365 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:11:46,365 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:11:46,366 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (1/1) ... [2023-11-12 02:11:46,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:11:46,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:46,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:11:46,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:11:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2023-11-12 02:11:46,462 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2023-11-12 02:11:46,463 INFO L130 BoogieDeclarations]: Found specification of procedure pf_getgeo [2023-11-12 02:11:46,463 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_getgeo [2023-11-12 02:11:46,464 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-12 02:11:46,464 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-12 02:11:46,464 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2023-11-12 02:11:46,464 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2023-11-12 02:11:46,464 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2023-11-12 02:11:46,465 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2023-11-12 02:11:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 02:11:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pf_mutex [2023-11-12 02:11:46,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pf_mutex [2023-11-12 02:11:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure pf_reset [2023-11-12 02:11:46,466 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_reset [2023-11-12 02:11:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:11:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2023-11-12 02:11:46,468 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2023-11-12 02:11:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure pf_wait [2023-11-12 02:11:46,468 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_wait [2023-11-12 02:11:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2023-11-12 02:11:46,469 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2023-11-12 02:11:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 02:11:46,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 02:11:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pf_mutex [2023-11-12 02:11:46,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pf_mutex [2023-11-12 02:11:46,470 INFO L130 BoogieDeclarations]: Found specification of procedure pf_check_events [2023-11-12 02:11:46,470 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_check_events [2023-11-12 02:11:46,470 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2023-11-12 02:11:46,471 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2023-11-12 02:11:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:11:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-12 02:11:46,471 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-12 02:11:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-12 02:11:46,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-12 02:11:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure set_capacity [2023-11-12 02:11:46,473 INFO L138 BoogieDeclarations]: Found implementation of procedure set_capacity [2023-11-12 02:11:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure pf_req_sense [2023-11-12 02:11:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_req_sense [2023-11-12 02:11:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure pf_completion [2023-11-12 02:11:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_completion [2023-11-12 02:11:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:11:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-12 02:11:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-12 02:11:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:11:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-12 02:11:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-12 02:11:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:11:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:11:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure pf_atapi [2023-11-12 02:11:46,476 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_atapi [2023-11-12 02:11:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure pf_command [2023-11-12 02:11:46,476 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_command [2023-11-12 02:11:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure pf_probe [2023-11-12 02:11:46,477 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_probe [2023-11-12 02:11:46,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:11:46,477 INFO L130 BoogieDeclarations]: Found specification of procedure pf_identify [2023-11-12 02:11:46,477 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_identify [2023-11-12 02:11:46,477 INFO L130 BoogieDeclarations]: Found specification of procedure pf_sleep [2023-11-12 02:11:46,478 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_sleep [2023-11-12 02:11:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure pf_mode_sense [2023-11-12 02:11:46,478 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_mode_sense [2023-11-12 02:11:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2023-11-12 02:11:46,478 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2023-11-12 02:11:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:11:46,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 02:11:46,479 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2023-11-12 02:11:46,479 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2023-11-12 02:11:46,479 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2023-11-12 02:11:46,479 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2023-11-12 02:11:46,480 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-12 02:11:46,480 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-12 02:11:46,481 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2023-11-12 02:11:46,481 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2023-11-12 02:11:46,482 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2023-11-12 02:11:46,482 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2023-11-12 02:11:46,483 INFO L130 BoogieDeclarations]: Found specification of procedure get_capacity [2023-11-12 02:11:46,483 INFO L138 BoogieDeclarations]: Found implementation of procedure get_capacity [2023-11-12 02:11:46,483 INFO L130 BoogieDeclarations]: Found specification of procedure pf_lock [2023-11-12 02:11:46,483 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_lock [2023-11-12 02:11:46,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:11:46,484 INFO L130 BoogieDeclarations]: Found specification of procedure xl [2023-11-12 02:11:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure xl [2023-11-12 02:11:46,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:11:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:11:46,484 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2023-11-12 02:11:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2023-11-12 02:11:46,485 INFO L130 BoogieDeclarations]: Found specification of procedure pf_ioctl [2023-11-12 02:11:46,485 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_ioctl [2023-11-12 02:11:46,898 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:11:46,901 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:11:51,372 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:11:51,397 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:11:51,397 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:11:51,402 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:51 BoogieIcfgContainer [2023-11-12 02:11:51,402 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:11:51,405 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:11:51,405 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:11:51,408 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:11:51,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:11:43" (1/3) ... [2023-11-12 02:11:51,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfe64b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:51, skipping insertion in model container [2023-11-12 02:11:51,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:45" (2/3) ... [2023-11-12 02:11:51,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfe64b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:51, skipping insertion in model container [2023-11-12 02:11:51,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:51" (3/3) ... [2023-11-12 02:11:51,412 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2023-11-12 02:11:51,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:11:51,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:11:51,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:11:51,511 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=LoopHeads, 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;@33bbdf71, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:11:51,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:11:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 568 states, 402 states have (on average 1.3606965174129353) internal successors, (547), 416 states have internal predecessors, (547), 128 states have call successors, (128), 38 states have call predecessors, (128), 38 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-12 02:11:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 02:11:51,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:51,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:51,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:51,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:51,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2109745106, now seen corresponding path program 1 times [2023-11-12 02:11:51,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:51,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310849449] [2023-11-12 02:11:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:51,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:52,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310849449] [2023-11-12 02:11:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310849449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:52,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:52,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:52,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692000117] [2023-11-12 02:11:52,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:52,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:52,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:52,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:52,145 INFO L87 Difference]: Start difference. First operand has 568 states, 402 states have (on average 1.3606965174129353) internal successors, (547), 416 states have internal predecessors, (547), 128 states have call successors, (128), 38 states have call predecessors, (128), 38 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:52,458 INFO L93 Difference]: Finished difference Result 1572 states and 2277 transitions. [2023-11-12 02:11:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:52,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 02:11:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:52,488 INFO L225 Difference]: With dead ends: 1572 [2023-11-12 02:11:52,488 INFO L226 Difference]: Without dead ends: 999 [2023-11-12 02:11:52,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:52,503 INFO L413 NwaCegarLoop]: 1103 mSDtfsCounter, 616 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1854 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:52,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 1854 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-11-12 02:11:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 985. [2023-11-12 02:11:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 699 states have (on average 1.3490701001430616) internal successors, (943), 712 states have internal predecessors, (943), 219 states have call successors, (219), 67 states have call predecessors, (219), 66 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-12 02:11:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1375 transitions. [2023-11-12 02:11:52,695 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1375 transitions. Word has length 16 [2023-11-12 02:11:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:52,696 INFO L495 AbstractCegarLoop]: Abstraction has 985 states and 1375 transitions. [2023-11-12 02:11:52,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1375 transitions. [2023-11-12 02:11:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:11:52,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:52,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:52,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:11:52,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:52,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash 998666761, now seen corresponding path program 1 times [2023-11-12 02:11:52,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900139994] [2023-11-12 02:11:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:52,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900139994] [2023-11-12 02:11:52,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900139994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:52,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:52,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:52,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292278437] [2023-11-12 02:11:52,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:52,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:52,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:52,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:52,933 INFO L87 Difference]: Start difference. First operand 985 states and 1375 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:53,066 INFO L93 Difference]: Finished difference Result 1967 states and 2747 transitions. [2023-11-12 02:11:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 02:11:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:53,080 INFO L225 Difference]: With dead ends: 1967 [2023-11-12 02:11:53,080 INFO L226 Difference]: Without dead ends: 985 [2023-11-12 02:11:53,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:53,087 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 766 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:53,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 775 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2023-11-12 02:11:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 985. [2023-11-12 02:11:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 699 states have (on average 1.34620886981402) internal successors, (941), 712 states have internal predecessors, (941), 219 states have call successors, (219), 67 states have call predecessors, (219), 66 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-12 02:11:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1373 transitions. [2023-11-12 02:11:53,204 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1373 transitions. Word has length 18 [2023-11-12 02:11:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:53,205 INFO L495 AbstractCegarLoop]: Abstraction has 985 states and 1373 transitions. [2023-11-12 02:11:53,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1373 transitions. [2023-11-12 02:11:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 02:11:53,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:53,210 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] [2023-11-12 02:11:53,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:11:53,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:53,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash 215574931, now seen corresponding path program 1 times [2023-11-12 02:11:53,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:53,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295163761] [2023-11-12 02:11:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:53,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:53,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:11:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:53,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:53,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295163761] [2023-11-12 02:11:53,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295163761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:53,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:53,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:53,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922655253] [2023-11-12 02:11:53,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:53,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:53,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:53,462 INFO L87 Difference]: Start difference. First operand 985 states and 1373 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:11:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:53,620 INFO L93 Difference]: Finished difference Result 2362 states and 3283 transitions. [2023-11-12 02:11:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:53,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-12 02:11:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:53,633 INFO L225 Difference]: With dead ends: 2362 [2023-11-12 02:11:53,634 INFO L226 Difference]: Without dead ends: 1380 [2023-11-12 02:11:53,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:53,640 INFO L413 NwaCegarLoop]: 1250 mSDtfsCounter, 732 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:53,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 1786 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2023-11-12 02:11:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1356. [2023-11-12 02:11:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 957 states have (on average 1.3458725182863114) internal successors, (1288), 974 states have internal predecessors, (1288), 300 states have call successors, (300), 99 states have call predecessors, (300), 98 states have return successors, (294), 294 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-12 02:11:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1882 transitions. [2023-11-12 02:11:53,775 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1882 transitions. Word has length 22 [2023-11-12 02:11:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:53,776 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 1882 transitions. [2023-11-12 02:11:53,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:11:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1882 transitions. [2023-11-12 02:11:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 02:11:53,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:53,778 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] [2023-11-12 02:11:53,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:11:53,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:53,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash -40550368, now seen corresponding path program 1 times [2023-11-12 02:11:53,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:53,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486177315] [2023-11-12 02:11:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:53,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:11:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:53,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:53,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486177315] [2023-11-12 02:11:53,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486177315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:53,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:53,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:53,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837700786] [2023-11-12 02:11:53,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:53,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:53,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:53,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:53,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:53,948 INFO L87 Difference]: Start difference. First operand 1356 states and 1882 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:11:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:54,129 INFO L93 Difference]: Finished difference Result 2727 states and 3789 transitions. [2023-11-12 02:11:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-12 02:11:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:54,141 INFO L225 Difference]: With dead ends: 2727 [2023-11-12 02:11:54,141 INFO L226 Difference]: Without dead ends: 1374 [2023-11-12 02:11:54,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:54,148 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 12 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:54,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1539 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2023-11-12 02:11:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1358. [2023-11-12 02:11:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 959 states have (on average 1.3451511991657976) internal successors, (1290), 976 states have internal predecessors, (1290), 300 states have call successors, (300), 99 states have call predecessors, (300), 98 states have return successors, (294), 294 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-12 02:11:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1884 transitions. [2023-11-12 02:11:54,246 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1884 transitions. Word has length 30 [2023-11-12 02:11:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:54,246 INFO L495 AbstractCegarLoop]: Abstraction has 1358 states and 1884 transitions. [2023-11-12 02:11:54,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:11:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1884 transitions. [2023-11-12 02:11:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 02:11:54,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:54,248 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] [2023-11-12 02:11:54,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:11:54,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:54,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:54,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2103232647, now seen corresponding path program 1 times [2023-11-12 02:11:54,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:54,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736504386] [2023-11-12 02:11:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:11:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:54,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736504386] [2023-11-12 02:11:54,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736504386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326370030] [2023-11-12 02:11:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:54,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:54,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:54,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:54,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:11:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:54,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:11:54,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:54,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:54,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326370030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:54,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:54,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-12 02:11:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772323165] [2023-11-12 02:11:54,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:54,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:54,927 INFO L87 Difference]: Start difference. First operand 1358 states and 1884 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:11:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:55,043 INFO L93 Difference]: Finished difference Result 2751 states and 3825 transitions. [2023-11-12 02:11:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2023-11-12 02:11:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:55,055 INFO L225 Difference]: With dead ends: 2751 [2023-11-12 02:11:55,055 INFO L226 Difference]: Without dead ends: 1396 [2023-11-12 02:11:55,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:55,062 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 16 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:55,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1544 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2023-11-12 02:11:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1362. [2023-11-12 02:11:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 963 states have (on average 1.343717549325026) internal successors, (1294), 980 states have internal predecessors, (1294), 300 states have call successors, (300), 99 states have call predecessors, (300), 98 states have return successors, (294), 294 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-12 02:11:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1888 transitions. [2023-11-12 02:11:55,163 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1888 transitions. Word has length 34 [2023-11-12 02:11:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:55,163 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1888 transitions. [2023-11-12 02:11:55,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:11:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1888 transitions. [2023-11-12 02:11:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 02:11:55,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:55,165 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] [2023-11-12 02:11:55,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:55,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:55,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:55,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:55,377 INFO L85 PathProgramCache]: Analyzing trace with hash 914446798, now seen corresponding path program 1 times [2023-11-12 02:11:55,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:55,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683581686] [2023-11-12 02:11:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:55,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:55,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:11:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:55,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683581686] [2023-11-12 02:11:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683581686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736935391] [2023-11-12 02:11:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:55,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:55,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:55,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:11:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:56,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:11:56,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:11:56,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736935391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:56,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-12 02:11:56,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132166493] [2023-11-12 02:11:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:56,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:56,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:56,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:56,119 INFO L87 Difference]: Start difference. First operand 1362 states and 1888 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:11:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:56,323 INFO L93 Difference]: Finished difference Result 4028 states and 5576 transitions. [2023-11-12 02:11:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:56,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-11-12 02:11:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:56,344 INFO L225 Difference]: With dead ends: 4028 [2023-11-12 02:11:56,345 INFO L226 Difference]: Without dead ends: 2669 [2023-11-12 02:11:56,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:56,353 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 737 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:56,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 1530 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2023-11-12 02:11:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2197. [2023-11-12 02:11:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 1547 states have (on average 1.339366515837104) internal successors, (2072), 1573 states have internal predecessors, (2072), 488 states have call successors, (488), 162 states have call predecessors, (488), 161 states have return successors, (482), 481 states have call predecessors, (482), 482 states have call successors, (482) [2023-11-12 02:11:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 3042 transitions. [2023-11-12 02:11:56,594 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 3042 transitions. Word has length 38 [2023-11-12 02:11:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:56,595 INFO L495 AbstractCegarLoop]: Abstraction has 2197 states and 3042 transitions. [2023-11-12 02:11:56,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:11:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 3042 transitions. [2023-11-12 02:11:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:11:56,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:56,597 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] [2023-11-12 02:11:56,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:56,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:56,806 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:56,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1640042817, now seen corresponding path program 1 times [2023-11-12 02:11:56,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:56,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148591339] [2023-11-12 02:11:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:56,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:57,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:11:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:57,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:11:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:57,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:57,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148591339] [2023-11-12 02:11:57,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148591339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:57,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097467846] [2023-11-12 02:11:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:57,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:57,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:57,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:57,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:11:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:57,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:11:57,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:57,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097467846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:57,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-12 02:11:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012468738] [2023-11-12 02:11:57,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:57,514 INFO L87 Difference]: Start difference. First operand 2197 states and 3042 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:11:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:57,687 INFO L93 Difference]: Finished difference Result 4428 states and 6140 transitions. [2023-11-12 02:11:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:57,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (3), 2 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 39 [2023-11-12 02:11:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:57,706 INFO L225 Difference]: With dead ends: 4428 [2023-11-12 02:11:57,707 INFO L226 Difference]: Without dead ends: 2234 [2023-11-12 02:11:57,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:57,719 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 29 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:57,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1522 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2023-11-12 02:11:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2231. [2023-11-12 02:11:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 1573 states have (on average 1.340114431023522) internal successors, (2108), 1599 states have internal predecessors, (2108), 496 states have call successors, (496), 162 states have call predecessors, (496), 161 states have return successors, (490), 489 states have call predecessors, (490), 490 states have call successors, (490) [2023-11-12 02:11:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 3094 transitions. [2023-11-12 02:11:57,924 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 3094 transitions. Word has length 39 [2023-11-12 02:11:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:57,925 INFO L495 AbstractCegarLoop]: Abstraction has 2231 states and 3094 transitions. [2023-11-12 02:11:57,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:11:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 3094 transitions. [2023-11-12 02:11:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 02:11:57,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:57,927 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] [2023-11-12 02:11:57,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:58,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:58,136 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:58,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:58,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1540036111, now seen corresponding path program 1 times [2023-11-12 02:11:58,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:58,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370769101] [2023-11-12 02:11:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:58,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:58,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:11:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:58,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:11:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:58,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:11:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:58,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:58,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370769101] [2023-11-12 02:11:58,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370769101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:58,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368597089] [2023-11-12 02:11:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:58,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:58,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:58,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:58,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:11:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:58,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:11:58,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:58,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:58,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368597089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:58,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:58,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:11:58,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365284820] [2023-11-12 02:11:58,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:58,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:58,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:11:58,860 INFO L87 Difference]: Start difference. First operand 2231 states and 3094 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:11:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:59,029 INFO L93 Difference]: Finished difference Result 2253 states and 3120 transitions. [2023-11-12 02:11:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-11-12 02:11:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:59,057 INFO L225 Difference]: With dead ends: 2253 [2023-11-12 02:11:59,057 INFO L226 Difference]: Without dead ends: 2242 [2023-11-12 02:11:59,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:11:59,061 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 771 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:59,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 801 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2023-11-12 02:11:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2231. [2023-11-12 02:11:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 1573 states have (on average 1.3394787031150668) internal successors, (2107), 1599 states have internal predecessors, (2107), 496 states have call successors, (496), 162 states have call predecessors, (496), 161 states have return successors, (490), 489 states have call predecessors, (490), 490 states have call successors, (490) [2023-11-12 02:11:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 3093 transitions. [2023-11-12 02:11:59,292 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 3093 transitions. Word has length 50 [2023-11-12 02:11:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:59,292 INFO L495 AbstractCegarLoop]: Abstraction has 2231 states and 3093 transitions. [2023-11-12 02:11:59,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:11:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 3093 transitions. [2023-11-12 02:11:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 02:11:59,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:59,295 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] [2023-11-12 02:11:59,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:59,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:59,504 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:59,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1482777809, now seen corresponding path program 1 times [2023-11-12 02:11:59,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:59,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112210153] [2023-11-12 02:11:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:59,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:11:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:59,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:11:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:59,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:11:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:59,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:59,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112210153] [2023-11-12 02:11:59,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112210153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:59,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496176495] [2023-11-12 02:11:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:59,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:59,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:59,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:59,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:12:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:00,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:12:00,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:12:00,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:00,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496176495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:00,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:00,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:12:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434105272] [2023-11-12 02:12:00,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:00,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:00,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:00,294 INFO L87 Difference]: Start difference. First operand 2231 states and 3093 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:12:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:00,492 INFO L93 Difference]: Finished difference Result 2233 states and 3094 transitions. [2023-11-12 02:12:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-11-12 02:12:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:00,511 INFO L225 Difference]: With dead ends: 2233 [2023-11-12 02:12:00,512 INFO L226 Difference]: Without dead ends: 2230 [2023-11-12 02:12:00,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:00,516 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 727 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:00,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 773 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2023-11-12 02:12:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2230. [2023-11-12 02:12:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 1573 states have (on average 1.3388429752066116) internal successors, (2106), 1598 states have internal predecessors, (2106), 495 states have call successors, (495), 162 states have call predecessors, (495), 161 states have return successors, (490), 489 states have call predecessors, (490), 490 states have call successors, (490) [2023-11-12 02:12:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 3091 transitions. [2023-11-12 02:12:00,713 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 3091 transitions. Word has length 50 [2023-11-12 02:12:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:00,714 INFO L495 AbstractCegarLoop]: Abstraction has 2230 states and 3091 transitions. [2023-11-12 02:12:00,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:12:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 3091 transitions. [2023-11-12 02:12:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 02:12:00,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:00,716 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] [2023-11-12 02:12:00,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:00,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:00,924 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:00,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1278199211, now seen corresponding path program 1 times [2023-11-12 02:12:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:00,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161040776] [2023-11-12 02:12:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:00,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:01,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:12:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:01,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:01,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:12:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:12:01,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:01,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161040776] [2023-11-12 02:12:01,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161040776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:01,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848014980] [2023-11-12 02:12:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:01,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:01,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:01,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:01,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:12:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:01,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:12:01,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:12:01,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:01,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848014980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:01,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:01,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:12:01,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854835273] [2023-11-12 02:12:01,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:01,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:01,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:01,717 INFO L87 Difference]: Start difference. First operand 2230 states and 3091 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:12:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:01,931 INFO L93 Difference]: Finished difference Result 2232 states and 3092 transitions. [2023-11-12 02:12:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2023-11-12 02:12:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:01,950 INFO L225 Difference]: With dead ends: 2232 [2023-11-12 02:12:01,951 INFO L226 Difference]: Without dead ends: 2229 [2023-11-12 02:12:01,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:01,953 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 724 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:01,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 771 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2023-11-12 02:12:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 2229. [2023-11-12 02:12:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 1573 states have (on average 1.3382072472981563) internal successors, (2105), 1597 states have internal predecessors, (2105), 494 states have call successors, (494), 162 states have call predecessors, (494), 161 states have return successors, (490), 489 states have call predecessors, (490), 490 states have call successors, (490) [2023-11-12 02:12:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 3089 transitions. [2023-11-12 02:12:02,149 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 3089 transitions. Word has length 51 [2023-11-12 02:12:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:02,149 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 3089 transitions. [2023-11-12 02:12:02,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:12:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 3089 transitions. [2023-11-12 02:12:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 02:12:02,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:02,153 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] [2023-11-12 02:12:02,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:02,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:12:02,361 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:02,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:02,361 INFO L85 PathProgramCache]: Analyzing trace with hash 969145778, now seen corresponding path program 1 times [2023-11-12 02:12:02,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:02,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949616648] [2023-11-12 02:12:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:02,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:02,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:12:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:02,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:02,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:12:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:12:02,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:02,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949616648] [2023-11-12 02:12:02,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949616648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:02,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435031997] [2023-11-12 02:12:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:02,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:02,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:02,593 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:02,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:12:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:03,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:12:03,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:12:03,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:03,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435031997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:03,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:03,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:12:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354138357] [2023-11-12 02:12:03,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:03,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:03,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:03,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:03,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:03,131 INFO L87 Difference]: Start difference. First operand 2229 states and 3089 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:12:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:03,333 INFO L93 Difference]: Finished difference Result 2231 states and 3090 transitions. [2023-11-12 02:12:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:03,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-11-12 02:12:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:03,353 INFO L225 Difference]: With dead ends: 2231 [2023-11-12 02:12:03,353 INFO L226 Difference]: Without dead ends: 2228 [2023-11-12 02:12:03,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:03,357 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 721 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:03,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 769 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2023-11-12 02:12:03,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2228. [2023-11-12 02:12:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 1573 states have (on average 1.3375715193897013) internal successors, (2104), 1596 states have internal predecessors, (2104), 493 states have call successors, (493), 162 states have call predecessors, (493), 161 states have return successors, (490), 489 states have call predecessors, (490), 490 states have call successors, (490) [2023-11-12 02:12:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 3087 transitions. [2023-11-12 02:12:03,602 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 3087 transitions. Word has length 52 [2023-11-12 02:12:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:03,602 INFO L495 AbstractCegarLoop]: Abstraction has 2228 states and 3087 transitions. [2023-11-12 02:12:03,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:12:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 3087 transitions. [2023-11-12 02:12:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-12 02:12:03,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:03,605 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] [2023-11-12 02:12:03,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:03,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:12:03,814 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:03,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash -21571186, now seen corresponding path program 1 times [2023-11-12 02:12:03,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:03,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150587096] [2023-11-12 02:12:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:03,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:12:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:04,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:04,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:12:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:12:04,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:04,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150587096] [2023-11-12 02:12:04,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150587096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:04,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445941036] [2023-11-12 02:12:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:04,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:04,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:04,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:04,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:12:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:04,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:12:04,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:12:04,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:04,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445941036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:04,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:04,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:12:04,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859283946] [2023-11-12 02:12:04,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:04,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:04,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:04,575 INFO L87 Difference]: Start difference. First operand 2228 states and 3087 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:12:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:04,811 INFO L93 Difference]: Finished difference Result 2709 states and 3732 transitions. [2023-11-12 02:12:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2023-11-12 02:12:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:04,833 INFO L225 Difference]: With dead ends: 2709 [2023-11-12 02:12:04,833 INFO L226 Difference]: Without dead ends: 2677 [2023-11-12 02:12:04,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:04,836 INFO L413 NwaCegarLoop]: 1075 mSDtfsCounter, 649 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:04,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1459 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2023-11-12 02:12:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2677. [2023-11-12 02:12:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 1873 states have (on average 1.3283502402562735) internal successors, (2488), 1898 states have internal predecessors, (2488), 602 states have call successors, (602), 202 states have call predecessors, (602), 201 states have return successors, (601), 600 states have call predecessors, (601), 601 states have call successors, (601) [2023-11-12 02:12:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 3691 transitions. [2023-11-12 02:12:05,141 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 3691 transitions. Word has length 53 [2023-11-12 02:12:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:05,141 INFO L495 AbstractCegarLoop]: Abstraction has 2677 states and 3691 transitions. [2023-11-12 02:12:05,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:12:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 3691 transitions. [2023-11-12 02:12:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 02:12:05,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:05,145 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:05,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 02:12:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:12:05,354 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:05,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1343021799, now seen corresponding path program 1 times [2023-11-12 02:12:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:05,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664400625] [2023-11-12 02:12:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:05,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:05,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:12:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:05,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:05,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:12:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:05,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:12:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:05,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-12 02:12:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:12:05,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:05,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664400625] [2023-11-12 02:12:05,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664400625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:05,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663584014] [2023-11-12 02:12:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:05,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:05,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:05,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:05,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:12:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:06,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:12:06,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:12:06,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:06,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663584014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:06,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:06,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 02:12:06,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858703910] [2023-11-12 02:12:06,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:06,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:06,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:12:06,065 INFO L87 Difference]: Start difference. First operand 2677 states and 3691 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:12:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:06,633 INFO L93 Difference]: Finished difference Result 6846 states and 9407 transitions. [2023-11-12 02:12:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-11-12 02:12:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:06,679 INFO L225 Difference]: With dead ends: 6846 [2023-11-12 02:12:06,680 INFO L226 Difference]: Without dead ends: 4172 [2023-11-12 02:12:06,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:12:06,695 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 688 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:06,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 1404 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:12:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2023-11-12 02:12:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 4169. [2023-11-12 02:12:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 2925 states have (on average 1.3258119658119658) internal successors, (3878), 2962 states have internal predecessors, (3878), 914 states have call successors, (914), 330 states have call predecessors, (914), 329 states have return successors, (913), 912 states have call predecessors, (913), 913 states have call successors, (913) [2023-11-12 02:12:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 5705 transitions. [2023-11-12 02:12:07,123 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 5705 transitions. Word has length 71 [2023-11-12 02:12:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:07,123 INFO L495 AbstractCegarLoop]: Abstraction has 4169 states and 5705 transitions. [2023-11-12 02:12:07,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:12:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 5705 transitions. [2023-11-12 02:12:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 02:12:07,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:07,131 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:07,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:07,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:12:07,339 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:07,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:07,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1349905004, now seen corresponding path program 1 times [2023-11-12 02:12:07,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:07,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322973609] [2023-11-12 02:12:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:07,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:12:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:12:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-12 02:12:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-12 02:12:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-12 02:12:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:12:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:12:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-12 02:12:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-12 02:12:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:12:07,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:07,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322973609] [2023-11-12 02:12:07,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322973609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:07,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435475227] [2023-11-12 02:12:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:07,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:07,864 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:07,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:12:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:08,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:12:08,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:12:08,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:08,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435475227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:08,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:08,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2023-11-12 02:12:08,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734465127] [2023-11-12 02:12:08,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:08,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:08,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:08,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:12:08,470 INFO L87 Difference]: Start difference. First operand 4169 states and 5705 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 02:12:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:08,846 INFO L93 Difference]: Finished difference Result 8347 states and 11659 transitions. [2023-11-12 02:12:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2023-11-12 02:12:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:08,881 INFO L225 Difference]: With dead ends: 8347 [2023-11-12 02:12:08,881 INFO L226 Difference]: Without dead ends: 4181 [2023-11-12 02:12:08,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:12:08,906 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 0 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:08,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1475 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2023-11-12 02:12:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4181. [2023-11-12 02:12:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 2937 states have (on average 1.32448076268301) internal successors, (3890), 2974 states have internal predecessors, (3890), 914 states have call successors, (914), 330 states have call predecessors, (914), 329 states have return successors, (913), 912 states have call predecessors, (913), 913 states have call successors, (913) [2023-11-12 02:12:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 5717 transitions. [2023-11-12 02:12:09,288 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 5717 transitions. Word has length 134 [2023-11-12 02:12:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:09,288 INFO L495 AbstractCegarLoop]: Abstraction has 4181 states and 5717 transitions. [2023-11-12 02:12:09,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 02:12:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 5717 transitions. [2023-11-12 02:12:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-12 02:12:09,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:09,295 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:09,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:09,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:09,504 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:09,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash 741199345, now seen corresponding path program 1 times [2023-11-12 02:12:09,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:09,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246788922] [2023-11-12 02:12:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:09,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:09,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:12:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:09,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:09,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:12:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:09,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-12 02:12:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:09,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-12 02:12:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-12 02:12:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:09,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:09,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:10,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:12:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:12:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:10,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:10,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:10,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-12 02:12:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:10,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-12 02:12:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:12:10,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:10,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246788922] [2023-11-12 02:12:10,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246788922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:10,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109922631] [2023-11-12 02:12:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:10,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:10,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:10,113 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:10,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:12:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:10,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:12:10,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:12:10,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109922631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:10,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:10,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-12 02:12:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697936368] [2023-11-12 02:12:10,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:10,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:12:10,860 INFO L87 Difference]: Start difference. First operand 4181 states and 5717 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:12:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:11,250 INFO L93 Difference]: Finished difference Result 8407 states and 11638 transitions. [2023-11-12 02:12:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:11,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 135 [2023-11-12 02:12:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:11,278 INFO L225 Difference]: With dead ends: 8407 [2023-11-12 02:12:11,278 INFO L226 Difference]: Without dead ends: 4229 [2023-11-12 02:12:11,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:12:11,303 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 3 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:11,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1471 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2023-11-12 02:12:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4193. [2023-11-12 02:12:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4193 states, 2949 states have (on average 1.3231603933536793) internal successors, (3902), 2986 states have internal predecessors, (3902), 914 states have call successors, (914), 330 states have call predecessors, (914), 329 states have return successors, (913), 912 states have call predecessors, (913), 913 states have call successors, (913) [2023-11-12 02:12:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4193 states to 4193 states and 5729 transitions. [2023-11-12 02:12:11,720 INFO L78 Accepts]: Start accepts. Automaton has 4193 states and 5729 transitions. Word has length 135 [2023-11-12 02:12:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:11,721 INFO L495 AbstractCegarLoop]: Abstraction has 4193 states and 5729 transitions. [2023-11-12 02:12:11,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:12:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4193 states and 5729 transitions. [2023-11-12 02:12:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-12 02:12:11,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:11,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:11,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:11,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:11,941 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:11,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:11,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1476704393, now seen corresponding path program 1 times [2023-11-12 02:12:11,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:11,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896262935] [2023-11-12 02:12:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:12:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:12:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-12 02:12:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-12 02:12:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-12 02:12:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:12:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:12:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-12 02:12:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-12 02:12:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-12 02:12:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:12:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:12:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-12 02:12:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-12 02:12:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 02:12:12,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:12,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896262935] [2023-11-12 02:12:12,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896262935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:12,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506133112] [2023-11-12 02:12:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:12,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:12,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:12,970 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:12,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:12:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:13,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 2192 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:12:13,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:13,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:13,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506133112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:13,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:13,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-12 02:12:13,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181902908] [2023-11-12 02:12:13,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:13,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:12:13,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:13,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:12:13,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:12:13,799 INFO L87 Difference]: Start difference. First operand 4193 states and 5729 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-12 02:12:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:14,141 INFO L93 Difference]: Finished difference Result 8479 states and 11839 transitions. [2023-11-12 02:12:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:12:14,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 190 [2023-11-12 02:12:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:14,166 INFO L225 Difference]: With dead ends: 8479 [2023-11-12 02:12:14,166 INFO L226 Difference]: Without dead ends: 4289 [2023-11-12 02:12:14,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:12:14,190 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 25 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:14,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2203 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2023-11-12 02:12:14,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 4217. [2023-11-12 02:12:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4217 states, 2973 states have (on average 1.320551631348806) internal successors, (3926), 3010 states have internal predecessors, (3926), 914 states have call successors, (914), 330 states have call predecessors, (914), 329 states have return successors, (913), 912 states have call predecessors, (913), 913 states have call successors, (913) [2023-11-12 02:12:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4217 states to 4217 states and 5753 transitions. [2023-11-12 02:12:14,616 INFO L78 Accepts]: Start accepts. Automaton has 4217 states and 5753 transitions. Word has length 190 [2023-11-12 02:12:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:14,617 INFO L495 AbstractCegarLoop]: Abstraction has 4217 states and 5753 transitions. [2023-11-12 02:12:14,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-12 02:12:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4217 states and 5753 transitions. [2023-11-12 02:12:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-12 02:12:14,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:14,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:14,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:12:14,840 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:14,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash -707307781, now seen corresponding path program 1 times [2023-11-12 02:12:14,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:14,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755432009] [2023-11-12 02:12:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:14,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:12:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:12:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-12 02:12:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-12 02:12:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-12 02:12:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:12:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:12:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-12 02:12:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:12:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:12:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:12:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:12:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:12:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-12 02:12:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:12:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-12 02:12:15,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:15,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755432009] [2023-11-12 02:12:15,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755432009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:15,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71699018] [2023-11-12 02:12:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:15,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:15,981 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:16,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2afee851-e139-43ec-925c-338a61cf9eec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:12:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:16,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 2188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:12:16,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-12 02:12:16,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-12 02:12:17,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71699018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:17,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:12:17,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 12 [2023-11-12 02:12:17,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806251510] [2023-11-12 02:12:17,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:17,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:12:17,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:12:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:12:17,194 INFO L87 Difference]: Start difference. First operand 4217 states and 5753 transitions. Second operand has 12 states, 12 states have (on average 16.166666666666668) internal successors, (194), 9 states have internal predecessors, (194), 2 states have call successors, (45), 4 states have call predecessors, (45), 3 states have return successors, (42), 3 states have call predecessors, (42), 2 states have call successors, (42)