./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d9dd329404607c04c3b8409033c911abc5eb1af40daa0f8673d76c8f1e85e1ae --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:17:32,469 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:17:32,540 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:17:32,546 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:17:32,547 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:17:32,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:17:32,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:17:32,574 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:17:32,575 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:17:32,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:17:32,576 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:17:32,576 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:17:32,577 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:17:32,577 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:17:32,578 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:17:32,578 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:17:32,579 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:17:32,580 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:17:32,580 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:17:32,581 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:17:32,581 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:17:32,582 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:17:32,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:17:32,583 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:17:32,584 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:17:32,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:17:32,585 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:17:32,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:17:32,586 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:17:32,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:17:32,586 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:17:32,587 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:17:32,592 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:17:32,593 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:17:32,593 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:17:32,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:17:32,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:17:32,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:17:32,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:17:32,595 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:17:32,595 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:17:32,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:17:32,596 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:17:32,596 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:17:32,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:17:32,597 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9dd329404607c04c3b8409033c911abc5eb1af40daa0f8673d76c8f1e85e1ae [2023-11-19 04:17:32,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:17:32,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:17:32,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:17:32,912 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:17:32,912 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:17:32,914 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c [2023-11-19 04:17:36,074 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:17:36,304 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:17:36,305 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c [2023-11-19 04:17:36,327 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/data/6a02b2bbe/ccee40356e9d41e5bf88af01c5e01215/FLAG97b69851f [2023-11-19 04:17:36,341 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/data/6a02b2bbe/ccee40356e9d41e5bf88af01c5e01215 [2023-11-19 04:17:36,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:17:36,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:17:36,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:17:36,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:17:36,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:17:36,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:36,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f6d99a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36, skipping insertion in model container [2023-11-19 04:17:36,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:36,430 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:17:36,637 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_ccd7b1a1-a91f-49b2-954a-a780aec626c4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c[911,924] [2023-11-19 04:17:36,739 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_ccd7b1a1-a91f-49b2-954a-a780aec626c4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c[8416,8429] [2023-11-19 04:17:36,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:17:36,828 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:17:36,841 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_ccd7b1a1-a91f-49b2-954a-a780aec626c4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c[911,924] [2023-11-19 04:17:36,863 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_ccd7b1a1-a91f-49b2-954a-a780aec626c4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c[8416,8429] [2023-11-19 04:17:36,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:17:36,908 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:17:36,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36 WrapperNode [2023-11-19 04:17:36,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:17:36,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:17:36,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:17:36,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:17:36,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:36,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:36,974 INFO L138 Inliner]: procedures = 59, calls = 68, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 514 [2023-11-19 04:17:36,975 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:17:36,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:17:36,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:17:36,979 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:17:36,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:36,990 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:36,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:36,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:37,017 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:37,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:37,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:37,032 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:37,037 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:17:37,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:17:37,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:17:37,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:17:37,039 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (1/1) ... [2023-11-19 04:17:37,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:17:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:37,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:17:37,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:17:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:17:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 04:17:37,126 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 04:17:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-19 04:17:37,129 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-19 04:17:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 04:17:37,129 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 04:17:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 04:17:37,130 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 04:17:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-19 04:17:37,130 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-19 04:17:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 04:17:37,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 04:17:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 04:17:37,131 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 04:17:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-19 04:17:37,132 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-19 04:17:37,132 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-19 04:17:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-19 04:17:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-19 04:17:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-19 04:17:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 04:17:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 04:17:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:17:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 04:17:37,136 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 04:17:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-19 04:17:37,137 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-19 04:17:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:17:37,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:17:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 04:17:37,138 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 04:17:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-19 04:17:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-19 04:17:37,248 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:17:37,250 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:17:37,951 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-11-19 04:17:37,951 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-11-19 04:17:38,024 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:17:38,267 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:17:38,267 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-19 04:17:38,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:17:38 BoogieIcfgContainer [2023-11-19 04:17:38,275 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:17:38,279 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:17:38,279 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:17:38,282 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:17:38,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:17:36" (1/3) ... [2023-11-19 04:17:38,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9862de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:17:38, skipping insertion in model container [2023-11-19 04:17:38,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:36" (2/3) ... [2023-11-19 04:17:38,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9862de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:17:38, skipping insertion in model container [2023-11-19 04:17:38,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:17:38" (3/3) ... [2023-11-19 04:17:38,287 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.02.cil-2.c [2023-11-19 04:17:38,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:17:38,307 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:17:38,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:17:38,371 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=FINITE_AUTOMATA, 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;@755382a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:17:38,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 04:17:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 114 states have (on average 1.4912280701754386) internal successors, (170), 122 states have internal predecessors, (170), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:17:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 04:17:38,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:38,388 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] [2023-11-19 04:17:38,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:38,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1074591001, now seen corresponding path program 1 times [2023-11-19 04:17:38,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:38,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920833762] [2023-11-19 04:17:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:38,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:17:38,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:38,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920833762] [2023-11-19 04:17:38,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920833762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:38,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:38,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:17:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813963948] [2023-11-19 04:17:38,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:38,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:17:38,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:38,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:17:38,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:17:38,942 INFO L87 Difference]: Start difference. First operand has 166 states, 114 states have (on average 1.4912280701754386) internal successors, (170), 122 states have internal predecessors, (170), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:17:39,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:39,695 INFO L93 Difference]: Finished difference Result 605 states and 895 transitions. [2023-11-19 04:17:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:17:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-19 04:17:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:39,713 INFO L225 Difference]: With dead ends: 605 [2023-11-19 04:17:39,714 INFO L226 Difference]: Without dead ends: 434 [2023-11-19 04:17:39,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:39,722 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 579 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:39,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 587 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:17:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-11-19 04:17:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 421. [2023-11-19 04:17:39,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 303 states have (on average 1.3795379537953796) internal successors, (418), 311 states have internal predecessors, (418), 79 states have call successors, (79), 39 states have call predecessors, (79), 37 states have return successors, (97), 72 states have call predecessors, (97), 75 states have call successors, (97) [2023-11-19 04:17:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 594 transitions. [2023-11-19 04:17:39,849 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 594 transitions. Word has length 38 [2023-11-19 04:17:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:39,850 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 594 transitions. [2023-11-19 04:17:39,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:17:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 594 transitions. [2023-11-19 04:17:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 04:17:39,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:39,874 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] [2023-11-19 04:17:39,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:17:39,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:39,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:39,876 INFO L85 PathProgramCache]: Analyzing trace with hash -160603928, now seen corresponding path program 1 times [2023-11-19 04:17:39,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:39,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471165238] [2023-11-19 04:17:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:17:39,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:39,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471165238] [2023-11-19 04:17:39,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471165238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:39,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:39,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:17:39,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972387922] [2023-11-19 04:17:39,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:39,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:17:39,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:17:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:17:39,987 INFO L87 Difference]: Start difference. First operand 421 states and 594 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:17:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:40,333 INFO L93 Difference]: Finished difference Result 621 states and 871 transitions. [2023-11-19 04:17:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:17:40,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2023-11-19 04:17:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:40,341 INFO L225 Difference]: With dead ends: 621 [2023-11-19 04:17:40,342 INFO L226 Difference]: Without dead ends: 550 [2023-11-19 04:17:40,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:17:40,345 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 280 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:40,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 413 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:17:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-11-19 04:17:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 539. [2023-11-19 04:17:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 387 states have (on average 1.3695090439276485) internal successors, (530), 395 states have internal predecessors, (530), 99 states have call successors, (99), 53 states have call predecessors, (99), 51 states have return successors, (120), 92 states have call predecessors, (120), 95 states have call successors, (120) [2023-11-19 04:17:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 749 transitions. [2023-11-19 04:17:40,413 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 749 transitions. Word has length 44 [2023-11-19 04:17:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:40,414 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 749 transitions. [2023-11-19 04:17:40,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:17:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 749 transitions. [2023-11-19 04:17:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 04:17:40,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:40,417 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] [2023-11-19 04:17:40,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:17:40,417 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:40,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:40,418 INFO L85 PathProgramCache]: Analyzing trace with hash 162298973, now seen corresponding path program 1 times [2023-11-19 04:17:40,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:40,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673458630] [2023-11-19 04:17:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:17:40,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:40,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673458630] [2023-11-19 04:17:40,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673458630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:40,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:40,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:17:40,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763927784] [2023-11-19 04:17:40,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:40,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:17:40,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:40,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:17:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:40,535 INFO L87 Difference]: Start difference. First operand 539 states and 749 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:17:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:41,296 INFO L93 Difference]: Finished difference Result 1076 states and 1472 transitions. [2023-11-19 04:17:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:17:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-19 04:17:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:41,301 INFO L225 Difference]: With dead ends: 1076 [2023-11-19 04:17:41,302 INFO L226 Difference]: Without dead ends: 610 [2023-11-19 04:17:41,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:17:41,305 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 672 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:41,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 743 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:17:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-11-19 04:17:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 525. [2023-11-19 04:17:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 373 states have (on average 1.3324396782841823) internal successors, (497), 381 states have internal predecessors, (497), 99 states have call successors, (99), 53 states have call predecessors, (99), 51 states have return successors, (117), 92 states have call predecessors, (117), 95 states have call successors, (117) [2023-11-19 04:17:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 713 transitions. [2023-11-19 04:17:41,369 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 713 transitions. Word has length 45 [2023-11-19 04:17:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:41,370 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 713 transitions. [2023-11-19 04:17:41,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:17:41,371 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 713 transitions. [2023-11-19 04:17:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 04:17:41,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:41,373 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] [2023-11-19 04:17:41,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:17:41,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:41,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:41,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1952460324, now seen corresponding path program 1 times [2023-11-19 04:17:41,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:41,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522895224] [2023-11-19 04:17:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:41,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:17:41,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:41,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522895224] [2023-11-19 04:17:41,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522895224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:41,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:41,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:17:41,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732137889] [2023-11-19 04:17:41,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:41,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:17:41,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:41,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:17:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:41,468 INFO L87 Difference]: Start difference. First operand 525 states and 713 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:17:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:42,155 INFO L93 Difference]: Finished difference Result 991 states and 1321 transitions. [2023-11-19 04:17:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:17:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2023-11-19 04:17:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:42,162 INFO L225 Difference]: With dead ends: 991 [2023-11-19 04:17:42,162 INFO L226 Difference]: Without dead ends: 814 [2023-11-19 04:17:42,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:17:42,164 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 586 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:42,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 701 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:17:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2023-11-19 04:17:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 789. [2023-11-19 04:17:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 554 states have (on average 1.2924187725631768) internal successors, (716), 562 states have internal predecessors, (716), 148 states have call successors, (148), 87 states have call predecessors, (148), 85 states have return successors, (183), 141 states have call predecessors, (183), 144 states have call successors, (183) [2023-11-19 04:17:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1047 transitions. [2023-11-19 04:17:42,267 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1047 transitions. Word has length 46 [2023-11-19 04:17:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:42,267 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1047 transitions. [2023-11-19 04:17:42,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:17:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1047 transitions. [2023-11-19 04:17:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 04:17:42,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:42,270 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] [2023-11-19 04:17:42,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:17:42,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:42,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:42,271 INFO L85 PathProgramCache]: Analyzing trace with hash 318916324, now seen corresponding path program 1 times [2023-11-19 04:17:42,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:42,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834805332] [2023-11-19 04:17:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:42,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:17:42,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:42,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834805332] [2023-11-19 04:17:42,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834805332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:42,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:42,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:17:42,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956278610] [2023-11-19 04:17:42,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:42,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:42,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:42,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:17:42,323 INFO L87 Difference]: Start difference. First operand 789 states and 1047 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:17:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:42,443 INFO L93 Difference]: Finished difference Result 790 states and 1048 transitions. [2023-11-19 04:17:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:42,444 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-19 04:17:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:42,448 INFO L225 Difference]: With dead ends: 790 [2023-11-19 04:17:42,449 INFO L226 Difference]: Without dead ends: 346 [2023-11-19 04:17:42,450 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 [2023-11-19 04:17:42,453 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 185 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:42,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 168 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:17:42,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-19 04:17:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2023-11-19 04:17:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 252 states have (on average 1.3650793650793651) internal successors, (344), 257 states have internal predecessors, (344), 63 states have call successors, (63), 31 states have call predecessors, (63), 30 states have return successors, (83), 58 states have call predecessors, (83), 61 states have call successors, (83) [2023-11-19 04:17:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 490 transitions. [2023-11-19 04:17:42,506 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 490 transitions. Word has length 50 [2023-11-19 04:17:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:42,510 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 490 transitions. [2023-11-19 04:17:42,511 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:17:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 490 transitions. [2023-11-19 04:17:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 04:17:42,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:42,514 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:17:42,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:17:42,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:42,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1495689356, now seen corresponding path program 1 times [2023-11-19 04:17:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:42,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778663309] [2023-11-19 04:17:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:17:42,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:42,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778663309] [2023-11-19 04:17:42,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778663309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:42,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:42,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:17:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033130999] [2023-11-19 04:17:42,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:42,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:17:42,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:17:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:42,889 INFO L87 Difference]: Start difference. First operand 346 states and 490 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 04:17:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:43,176 INFO L93 Difference]: Finished difference Result 895 states and 1279 transitions. [2023-11-19 04:17:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:17:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 68 [2023-11-19 04:17:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:43,182 INFO L225 Difference]: With dead ends: 895 [2023-11-19 04:17:43,182 INFO L226 Difference]: Without dead ends: 556 [2023-11-19 04:17:43,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:17:43,191 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 228 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:43,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 298 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:17:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-19 04:17:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 534. [2023-11-19 04:17:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 389 states have (on average 1.3470437017994858) internal successors, (524), 396 states have internal predecessors, (524), 96 states have call successors, (96), 49 states have call predecessors, (96), 48 states have return successors, (131), 89 states have call predecessors, (131), 94 states have call successors, (131) [2023-11-19 04:17:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 751 transitions. [2023-11-19 04:17:43,297 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 751 transitions. Word has length 68 [2023-11-19 04:17:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:43,298 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 751 transitions. [2023-11-19 04:17:43,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 04:17:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 751 transitions. [2023-11-19 04:17:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 04:17:43,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:43,302 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:17:43,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:17:43,302 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:43,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:43,303 INFO L85 PathProgramCache]: Analyzing trace with hash -178728561, now seen corresponding path program 1 times [2023-11-19 04:17:43,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:43,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441893983] [2023-11-19 04:17:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:43,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:17:43,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:43,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441893983] [2023-11-19 04:17:43,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441893983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:43,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:43,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:17:43,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736109944] [2023-11-19 04:17:43,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:43,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:17:43,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:17:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:43,704 INFO L87 Difference]: Start difference. First operand 534 states and 751 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 04:17:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:44,075 INFO L93 Difference]: Finished difference Result 1580 states and 2247 transitions. [2023-11-19 04:17:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:17:44,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2023-11-19 04:17:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:44,084 INFO L225 Difference]: With dead ends: 1580 [2023-11-19 04:17:44,084 INFO L226 Difference]: Without dead ends: 1053 [2023-11-19 04:17:44,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:17:44,087 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 236 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:44,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 252 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:17:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2023-11-19 04:17:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1009. [2023-11-19 04:17:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 734 states have (on average 1.32425068119891) internal successors, (972), 746 states have internal predecessors, (972), 178 states have call successors, (178), 97 states have call predecessors, (178), 96 states have return successors, (243), 166 states have call predecessors, (243), 176 states have call successors, (243) [2023-11-19 04:17:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1393 transitions. [2023-11-19 04:17:44,237 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1393 transitions. Word has length 70 [2023-11-19 04:17:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:44,239 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1393 transitions. [2023-11-19 04:17:44,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 04:17:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1393 transitions. [2023-11-19 04:17:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 04:17:44,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:44,242 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:17:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:17:44,242 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:44,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1748360396, now seen corresponding path program 1 times [2023-11-19 04:17:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:44,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382172562] [2023-11-19 04:17:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:17:44,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382172562] [2023-11-19 04:17:44,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382172562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:44,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:44,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:17:44,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139693168] [2023-11-19 04:17:44,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:44,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:44,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:44,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:44,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:17:44,332 INFO L87 Difference]: Start difference. First operand 1009 states and 1393 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 04:17:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:44,545 INFO L93 Difference]: Finished difference Result 2102 states and 2930 transitions. [2023-11-19 04:17:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:44,545 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 72 [2023-11-19 04:17:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:44,554 INFO L225 Difference]: With dead ends: 2102 [2023-11-19 04:17:44,554 INFO L226 Difference]: Without dead ends: 1224 [2023-11-19 04:17:44,559 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 [2023-11-19 04:17:44,561 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 36 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:44,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 236 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:17:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2023-11-19 04:17:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1107. [2023-11-19 04:17:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 820 states have (on average 1.329268292682927) internal successors, (1090), 832 states have internal predecessors, (1090), 184 states have call successors, (184), 103 states have call predecessors, (184), 102 states have return successors, (249), 172 states have call predecessors, (249), 182 states have call successors, (249) [2023-11-19 04:17:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1523 transitions. [2023-11-19 04:17:44,704 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1523 transitions. Word has length 72 [2023-11-19 04:17:44,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:44,705 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 1523 transitions. [2023-11-19 04:17:44,705 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 04:17:44,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1523 transitions. [2023-11-19 04:17:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 04:17:44,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:44,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:17:44,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:17:44,713 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:44,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1255182794, now seen corresponding path program 1 times [2023-11-19 04:17:44,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:44,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373447391] [2023-11-19 04:17:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 04:17:44,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373447391] [2023-11-19 04:17:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373447391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:44,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:44,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:17:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122433424] [2023-11-19 04:17:44,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:44,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:44,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:44,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:44,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:17:44,803 INFO L87 Difference]: Start difference. First operand 1107 states and 1523 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:17:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:45,027 INFO L93 Difference]: Finished difference Result 2755 states and 3839 transitions. [2023-11-19 04:17:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:45,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2023-11-19 04:17:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:45,039 INFO L225 Difference]: With dead ends: 2755 [2023-11-19 04:17:45,039 INFO L226 Difference]: Without dead ends: 1654 [2023-11-19 04:17:45,042 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 [2023-11-19 04:17:45,045 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 82 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:45,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 196 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:17:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2023-11-19 04:17:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1639. [2023-11-19 04:17:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1216 states have (on average 1.3108552631578947) internal successors, (1594), 1233 states have internal predecessors, (1594), 269 states have call successors, (269), 154 states have call predecessors, (269), 153 states have return successors, (364), 252 states have call predecessors, (364), 267 states have call successors, (364) [2023-11-19 04:17:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2227 transitions. [2023-11-19 04:17:45,226 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2227 transitions. Word has length 91 [2023-11-19 04:17:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:45,226 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2227 transitions. [2023-11-19 04:17:45,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:17:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2227 transitions. [2023-11-19 04:17:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 04:17:45,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:45,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:17:45,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:17:45,238 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:45,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:45,239 INFO L85 PathProgramCache]: Analyzing trace with hash -215180838, now seen corresponding path program 1 times [2023-11-19 04:17:45,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:45,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759786657] [2023-11-19 04:17:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:45,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 04:17:45,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:45,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759786657] [2023-11-19 04:17:45,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759786657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:45,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996889527] [2023-11-19 04:17:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:45,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:45,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:45,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:17:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:45,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:17:45,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:17:45,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:45,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996889527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:45,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:45,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 04:17:45,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832138036] [2023-11-19 04:17:45,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:45,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:45,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:45,655 INFO L87 Difference]: Start difference. First operand 1639 states and 2227 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:17:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:45,961 INFO L93 Difference]: Finished difference Result 3184 states and 4368 transitions. [2023-11-19 04:17:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:45,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2023-11-19 04:17:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:45,975 INFO L225 Difference]: With dead ends: 3184 [2023-11-19 04:17:45,975 INFO L226 Difference]: Without dead ends: 1980 [2023-11-19 04:17:45,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:45,981 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 80 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:45,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 125 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:17:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2023-11-19 04:17:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1924. [2023-11-19 04:17:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1463 states have (on average 1.3000683526999317) internal successors, (1902), 1477 states have internal predecessors, (1902), 275 states have call successors, (275), 184 states have call predecessors, (275), 185 states have return successors, (369), 263 states have call predecessors, (369), 273 states have call successors, (369) [2023-11-19 04:17:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2546 transitions. [2023-11-19 04:17:46,248 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2546 transitions. Word has length 106 [2023-11-19 04:17:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:46,248 INFO L495 AbstractCegarLoop]: Abstraction has 1924 states and 2546 transitions. [2023-11-19 04:17:46,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:17:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2546 transitions. [2023-11-19 04:17:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 04:17:46,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:46,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:17:46,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:46,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:17:46,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:46,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:46,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2022182427, now seen corresponding path program 1 times [2023-11-19 04:17:46,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:46,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660101361] [2023-11-19 04:17:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:46,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 04:17:46,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:46,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660101361] [2023-11-19 04:17:46,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660101361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:46,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241699484] [2023-11-19 04:17:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:46,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:46,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:46,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:46,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:17:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:46,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:17:46,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:17:46,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:46,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241699484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:46,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:46,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 04:17:46,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847142721] [2023-11-19 04:17:46,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:46,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:46,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:46,797 INFO L87 Difference]: Start difference. First operand 1924 states and 2546 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:17:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:47,080 INFO L93 Difference]: Finished difference Result 3677 states and 4932 transitions. [2023-11-19 04:17:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2023-11-19 04:17:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:47,099 INFO L225 Difference]: With dead ends: 3677 [2023-11-19 04:17:47,099 INFO L226 Difference]: Without dead ends: 2377 [2023-11-19 04:17:47,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:47,104 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 61 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:47,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 247 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:17:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2023-11-19 04:17:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2071. [2023-11-19 04:17:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1588 states have (on average 1.3073047858942066) internal successors, (2076), 1602 states have internal predecessors, (2076), 286 states have call successors, (286), 195 states have call predecessors, (286), 196 states have return successors, (380), 274 states have call predecessors, (380), 284 states have call successors, (380) [2023-11-19 04:17:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2742 transitions. [2023-11-19 04:17:47,328 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2742 transitions. Word has length 106 [2023-11-19 04:17:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:47,329 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 2742 transitions. [2023-11-19 04:17:47,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:17:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2742 transitions. [2023-11-19 04:17:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 04:17:47,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:47,336 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:17:47,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:47,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:47,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:47,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:47,557 INFO L85 PathProgramCache]: Analyzing trace with hash -774326292, now seen corresponding path program 2 times [2023-11-19 04:17:47,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:47,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039353342] [2023-11-19 04:17:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:47,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 04:17:47,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039353342] [2023-11-19 04:17:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039353342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043703132] [2023-11-19 04:17:47,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:17:47,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:47,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:47,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:47,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:17:47,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:17:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:17:47,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:17:47,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:17:48,011 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:48,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043703132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:48,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:48,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-19 04:17:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908002226] [2023-11-19 04:17:48,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:48,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:17:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:17:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:17:48,014 INFO L87 Difference]: Start difference. First operand 2071 states and 2742 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 04:17:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:48,343 INFO L93 Difference]: Finished difference Result 3718 states and 4910 transitions. [2023-11-19 04:17:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:17:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 106 [2023-11-19 04:17:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:48,359 INFO L225 Difference]: With dead ends: 3718 [2023-11-19 04:17:48,359 INFO L226 Difference]: Without dead ends: 2204 [2023-11-19 04:17:48,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:17:48,365 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 89 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:48,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 403 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:17:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2023-11-19 04:17:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2156. [2023-11-19 04:17:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 1648 states have (on average 1.3021844660194175) internal successors, (2146), 1668 states have internal predecessors, (2146), 294 states have call successors, (294), 200 states have call predecessors, (294), 213 states have return successors, (406), 288 states have call predecessors, (406), 292 states have call successors, (406) [2023-11-19 04:17:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 2846 transitions. [2023-11-19 04:17:48,760 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 2846 transitions. Word has length 106 [2023-11-19 04:17:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:48,761 INFO L495 AbstractCegarLoop]: Abstraction has 2156 states and 2846 transitions. [2023-11-19 04:17:48,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 04:17:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 2846 transitions. [2023-11-19 04:17:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 04:17:48,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:48,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:17:48,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:48,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 04:17:48,991 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:48,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 658508427, now seen corresponding path program 2 times [2023-11-19 04:17:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:48,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877242328] [2023-11-19 04:17:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:48,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:17:49,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877242328] [2023-11-19 04:17:49,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877242328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058878926] [2023-11-19 04:17:49,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:17:49,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:49,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:49,271 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:49,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:17:49,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:17:49,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:17:49,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:17:49,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 04:17:49,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:49,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058878926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:49,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:49,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:17:49,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895230185] [2023-11-19 04:17:49,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:49,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:49,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:49,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:49,440 INFO L87 Difference]: Start difference. First operand 2156 states and 2846 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:17:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:49,709 INFO L93 Difference]: Finished difference Result 3647 states and 5005 transitions. [2023-11-19 04:17:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:49,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2023-11-19 04:17:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:49,724 INFO L225 Difference]: With dead ends: 3647 [2023-11-19 04:17:49,724 INFO L226 Difference]: Without dead ends: 2168 [2023-11-19 04:17:49,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:49,730 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 93 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:49,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 240 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:17:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2023-11-19 04:17:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2150. [2023-11-19 04:17:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 1642 states have (on average 1.269183922046285) internal successors, (2084), 1662 states have internal predecessors, (2084), 294 states have call successors, (294), 200 states have call predecessors, (294), 213 states have return successors, (406), 288 states have call predecessors, (406), 292 states have call successors, (406) [2023-11-19 04:17:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 2784 transitions. [2023-11-19 04:17:49,973 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 2784 transitions. Word has length 106 [2023-11-19 04:17:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:49,973 INFO L495 AbstractCegarLoop]: Abstraction has 2150 states and 2784 transitions. [2023-11-19 04:17:49,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:17:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 2784 transitions. [2023-11-19 04:17:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 04:17:49,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:49,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:17:50,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:50,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 04:17:50,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:50,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1645372779, now seen corresponding path program 1 times [2023-11-19 04:17:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:50,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74162610] [2023-11-19 04:17:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:17:50,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:50,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74162610] [2023-11-19 04:17:50,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74162610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:50,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131559489] [2023-11-19 04:17:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:50,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:50,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:50,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:50,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:17:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:50,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:17:50,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:17:50,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:50,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131559489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:50,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:50,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:17:50,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907100639] [2023-11-19 04:17:50,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:50,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:50,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:50,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:50,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:50,646 INFO L87 Difference]: Start difference. First operand 2150 states and 2784 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:17:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:50,943 INFO L93 Difference]: Finished difference Result 4143 states and 5517 transitions. [2023-11-19 04:17:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:50,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2023-11-19 04:17:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:50,960 INFO L225 Difference]: With dead ends: 4143 [2023-11-19 04:17:50,960 INFO L226 Difference]: Without dead ends: 2587 [2023-11-19 04:17:50,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:50,967 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 85 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:50,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 244 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:17:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2023-11-19 04:17:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2523. [2023-11-19 04:17:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 1941 states have (on average 1.2570839773312725) internal successors, (2440), 1964 states have internal predecessors, (2440), 337 states have call successors, (337), 233 states have call predecessors, (337), 244 states have return successors, (484), 326 states have call predecessors, (484), 335 states have call successors, (484) [2023-11-19 04:17:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 3261 transitions. [2023-11-19 04:17:51,267 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 3261 transitions. Word has length 106 [2023-11-19 04:17:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:51,268 INFO L495 AbstractCegarLoop]: Abstraction has 2523 states and 3261 transitions. [2023-11-19 04:17:51,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:17:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 3261 transitions. [2023-11-19 04:17:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 04:17:51,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:51,274 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:51,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:51,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 04:17:51,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:51,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:51,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1061310647, now seen corresponding path program 1 times [2023-11-19 04:17:51,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:51,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964111028] [2023-11-19 04:17:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:51,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 04:17:51,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964111028] [2023-11-19 04:17:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964111028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479524544] [2023-11-19 04:17:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:51,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:51,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:51,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:51,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:17:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:51,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:17:51,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:17:51,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:51,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479524544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:51,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:51,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:17:51,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593510403] [2023-11-19 04:17:51,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:51,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:51,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:51,874 INFO L87 Difference]: Start difference. First operand 2523 states and 3261 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:17:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:52,114 INFO L93 Difference]: Finished difference Result 3602 states and 4688 transitions. [2023-11-19 04:17:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:52,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2023-11-19 04:17:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:52,130 INFO L225 Difference]: With dead ends: 3602 [2023-11-19 04:17:52,130 INFO L226 Difference]: Without dead ends: 2456 [2023-11-19 04:17:52,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:52,135 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:52,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 200 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:17:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2023-11-19 04:17:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2456. [2023-11-19 04:17:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 1886 states have (on average 1.2560975609756098) internal successors, (2369), 1906 states have internal predecessors, (2369), 337 states have call successors, (337), 233 states have call predecessors, (337), 232 states have return successors, (466), 317 states have call predecessors, (466), 335 states have call successors, (466) [2023-11-19 04:17:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3172 transitions. [2023-11-19 04:17:52,529 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3172 transitions. Word has length 108 [2023-11-19 04:17:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:52,530 INFO L495 AbstractCegarLoop]: Abstraction has 2456 states and 3172 transitions. [2023-11-19 04:17:52,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:17:52,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3172 transitions. [2023-11-19 04:17:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 04:17:52,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:52,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:52,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:52,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 04:17:52,758 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:52,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash -63773800, now seen corresponding path program 1 times [2023-11-19 04:17:52,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:52,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385154148] [2023-11-19 04:17:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:52,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-19 04:17:53,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385154148] [2023-11-19 04:17:53,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385154148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073676570] [2023-11-19 04:17:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:53,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:53,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:53,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:17:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:53,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:17:53,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:17:53,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:53,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073676570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:53,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:53,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:17:53,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577710086] [2023-11-19 04:17:53,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:53,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:53,211 INFO L87 Difference]: Start difference. First operand 2456 states and 3172 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:17:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:53,606 INFO L93 Difference]: Finished difference Result 5778 states and 7493 transitions. [2023-11-19 04:17:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:53,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2023-11-19 04:17:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:53,628 INFO L225 Difference]: With dead ends: 5778 [2023-11-19 04:17:53,628 INFO L226 Difference]: Without dead ends: 3368 [2023-11-19 04:17:53,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:53,635 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:53,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 194 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:17:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2023-11-19 04:17:53,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2731. [2023-11-19 04:17:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2119 states have (on average 1.2595563945257198) internal successors, (2669), 2140 states have internal predecessors, (2669), 358 states have call successors, (358), 254 states have call predecessors, (358), 253 states have return successors, (487), 337 states have call predecessors, (487), 356 states have call successors, (487) [2023-11-19 04:17:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3514 transitions. [2023-11-19 04:17:53,956 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3514 transitions. Word has length 109 [2023-11-19 04:17:53,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:53,956 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 3514 transitions. [2023-11-19 04:17:53,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:17:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3514 transitions. [2023-11-19 04:17:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-19 04:17:53,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:53,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:53,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:54,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 04:17:54,180 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:54,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash -514986975, now seen corresponding path program 1 times [2023-11-19 04:17:54,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:54,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875328267] [2023-11-19 04:17:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:54,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-19 04:17:54,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:54,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875328267] [2023-11-19 04:17:54,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875328267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:54,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048915433] [2023-11-19 04:17:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:54,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:54,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:54,328 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:54,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:17:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:54,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:17:54,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:17:54,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:54,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048915433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:54,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:54,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-11-19 04:17:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426046502] [2023-11-19 04:17:54,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:54,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:54,541 INFO L87 Difference]: Start difference. First operand 2731 states and 3514 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:17:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:54,899 INFO L93 Difference]: Finished difference Result 4980 states and 6557 transitions. [2023-11-19 04:17:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:54,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 111 [2023-11-19 04:17:54,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:54,929 INFO L225 Difference]: With dead ends: 4980 [2023-11-19 04:17:54,929 INFO L226 Difference]: Without dead ends: 3113 [2023-11-19 04:17:54,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:54,935 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:54,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 140 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:17:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2023-11-19 04:17:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 3069. [2023-11-19 04:17:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 2425 states have (on average 1.2342268041237114) internal successors, (2993), 2446 states have internal predecessors, (2993), 360 states have call successors, (360), 284 states have call predecessors, (360), 283 states have return successors, (535), 339 states have call predecessors, (535), 358 states have call successors, (535) [2023-11-19 04:17:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 3888 transitions. [2023-11-19 04:17:55,273 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 3888 transitions. Word has length 111 [2023-11-19 04:17:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:55,273 INFO L495 AbstractCegarLoop]: Abstraction has 3069 states and 3888 transitions. [2023-11-19 04:17:55,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:17:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 3888 transitions. [2023-11-19 04:17:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 04:17:55,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:55,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:55,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:55,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 04:17:55,501 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:55,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:55,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2088771890, now seen corresponding path program 1 times [2023-11-19 04:17:55,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:55,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188003180] [2023-11-19 04:17:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:55,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 04:17:55,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:55,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188003180] [2023-11-19 04:17:55,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188003180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:55,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125579219] [2023-11-19 04:17:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:55,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:55,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:55,595 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:55,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:17:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:55,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:17:55,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:17:55,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:55,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125579219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:55,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:55,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 04:17:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692338157] [2023-11-19 04:17:55,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:55,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:55,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:55,799 INFO L87 Difference]: Start difference. First operand 3069 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:17:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:56,152 INFO L93 Difference]: Finished difference Result 4807 states and 6065 transitions. [2023-11-19 04:17:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 107 [2023-11-19 04:17:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:56,170 INFO L225 Difference]: With dead ends: 4807 [2023-11-19 04:17:56,170 INFO L226 Difference]: Without dead ends: 3478 [2023-11-19 04:17:56,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:56,175 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 49 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:56,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 239 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:17:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2023-11-19 04:17:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 3257. [2023-11-19 04:17:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2581 states have (on average 1.2371173963580007) internal successors, (3193), 2602 states have internal predecessors, (3193), 376 states have call successors, (376), 300 states have call predecessors, (376), 299 states have return successors, (551), 355 states have call predecessors, (551), 374 states have call successors, (551) [2023-11-19 04:17:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4120 transitions. [2023-11-19 04:17:56,593 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4120 transitions. Word has length 107 [2023-11-19 04:17:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:56,593 INFO L495 AbstractCegarLoop]: Abstraction has 3257 states and 4120 transitions. [2023-11-19 04:17:56,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:17:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4120 transitions. [2023-11-19 04:17:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-19 04:17:56,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:56,603 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:56,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:56,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 04:17:56,820 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:56,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:56,821 INFO L85 PathProgramCache]: Analyzing trace with hash 412196908, now seen corresponding path program 1 times [2023-11-19 04:17:56,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:56,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131443402] [2023-11-19 04:17:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:56,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 04:17:57,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:57,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131443402] [2023-11-19 04:17:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131443402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510464049] [2023-11-19 04:17:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:57,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:57,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:57,513 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:57,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 04:17:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:57,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:17:57,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 04:17:57,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:57,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510464049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:57,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:57,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2023-11-19 04:17:57,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344608572] [2023-11-19 04:17:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:57,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:17:57,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:17:57,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:17:57,782 INFO L87 Difference]: Start difference. First operand 3257 states and 4120 transitions. Second operand has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:17:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:58,390 INFO L93 Difference]: Finished difference Result 6276 states and 8028 transitions. [2023-11-19 04:17:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:17:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 113 [2023-11-19 04:17:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:58,412 INFO L225 Difference]: With dead ends: 6276 [2023-11-19 04:17:58,413 INFO L226 Difference]: Without dead ends: 3412 [2023-11-19 04:17:58,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-11-19 04:17:58,420 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 107 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:58,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 827 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:17:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2023-11-19 04:17:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 2939. [2023-11-19 04:17:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2331 states have (on average 1.2303732303732304) internal successors, (2868), 2347 states have internal predecessors, (2868), 338 states have call successors, (338), 270 states have call predecessors, (338), 269 states have return successors, (483), 322 states have call predecessors, (483), 336 states have call successors, (483) [2023-11-19 04:17:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 3689 transitions. [2023-11-19 04:17:58,761 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 3689 transitions. Word has length 113 [2023-11-19 04:17:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:58,761 INFO L495 AbstractCegarLoop]: Abstraction has 2939 states and 3689 transitions. [2023-11-19 04:17:58,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:17:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 3689 transitions. [2023-11-19 04:17:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 04:17:58,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:58,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:58,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:58,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:58,988 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:58,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1746086307, now seen corresponding path program 1 times [2023-11-19 04:17:58,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:58,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967726325] [2023-11-19 04:17:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:58,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 04:17:59,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:59,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967726325] [2023-11-19 04:17:59,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967726325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:59,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538435962] [2023-11-19 04:17:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:59,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:59,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:59,169 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:59,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 04:17:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:59,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:17:59,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:17:59,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:59,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538435962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:59,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:59,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-11-19 04:17:59,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704641822] [2023-11-19 04:17:59,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:59,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:17:59,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:59,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:17:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:59,401 INFO L87 Difference]: Start difference. First operand 2939 states and 3689 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:17:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:59,943 INFO L93 Difference]: Finished difference Result 6185 states and 7814 transitions. [2023-11-19 04:17:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:17:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 109 [2023-11-19 04:17:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:59,956 INFO L225 Difference]: With dead ends: 6185 [2023-11-19 04:17:59,956 INFO L226 Difference]: Without dead ends: 3696 [2023-11-19 04:17:59,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:59,964 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 128 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:59,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 262 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:17:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2023-11-19 04:18:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3305. [2023-11-19 04:18:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2655 states have (on average 1.2131826741996234) internal successors, (3221), 2678 states have internal predecessors, (3221), 349 states have call successors, (349), 297 states have call predecessors, (349), 300 states have return successors, (505), 330 states have call predecessors, (505), 347 states have call successors, (505) [2023-11-19 04:18:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 4075 transitions. [2023-11-19 04:18:00,348 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 4075 transitions. Word has length 109 [2023-11-19 04:18:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:00,349 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 4075 transitions. [2023-11-19 04:18:00,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:18:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 4075 transitions. [2023-11-19 04:18:00,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 04:18:00,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:00,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:00,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 04:18:00,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:18:00,572 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:00,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash -956055263, now seen corresponding path program 1 times [2023-11-19 04:18:00,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:00,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668841080] [2023-11-19 04:18:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:00,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 04:18:00,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:00,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668841080] [2023-11-19 04:18:00,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668841080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:00,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:00,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:18:00,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632927184] [2023-11-19 04:18:00,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:00,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:18:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:18:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:18:00,765 INFO L87 Difference]: Start difference. First operand 3305 states and 4075 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:18:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:01,562 INFO L93 Difference]: Finished difference Result 8106 states and 10031 transitions. [2023-11-19 04:18:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:18:01,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2023-11-19 04:18:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:01,576 INFO L225 Difference]: With dead ends: 8106 [2023-11-19 04:18:01,576 INFO L226 Difference]: Without dead ends: 4246 [2023-11-19 04:18:01,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:18:01,586 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 68 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:01,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 384 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:18:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4246 states. [2023-11-19 04:18:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4246 to 4120. [2023-11-19 04:18:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 3271 states have (on average 1.1974931213696118) internal successors, (3917), 3304 states have internal predecessors, (3917), 455 states have call successors, (455), 383 states have call predecessors, (455), 393 states have return successors, (674), 433 states have call predecessors, (674), 453 states have call successors, (674) [2023-11-19 04:18:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 5046 transitions. [2023-11-19 04:18:02,150 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 5046 transitions. Word has length 110 [2023-11-19 04:18:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:02,153 INFO L495 AbstractCegarLoop]: Abstraction has 4120 states and 5046 transitions. [2023-11-19 04:18:02,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:18:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 5046 transitions. [2023-11-19 04:18:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 04:18:02,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:02,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:02,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-19 04:18:02,161 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:02,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1220160640, now seen corresponding path program 1 times [2023-11-19 04:18:02,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:02,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507385636] [2023-11-19 04:18:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:02,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:18:02,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:02,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507385636] [2023-11-19 04:18:02,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507385636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:18:02,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999567138] [2023-11-19 04:18:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:02,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:18:02,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:18:02,396 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:18:02,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 04:18:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:02,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 04:18:02,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:18:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:18:02,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:18:02,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999567138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:02,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:18:02,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-11-19 04:18:02,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410380202] [2023-11-19 04:18:02,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:02,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:18:02,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:02,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:18:02,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:18:02,628 INFO L87 Difference]: Start difference. First operand 4120 states and 5046 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 04:18:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:03,467 INFO L93 Difference]: Finished difference Result 8735 states and 10830 transitions. [2023-11-19 04:18:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:18:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 110 [2023-11-19 04:18:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:03,486 INFO L225 Difference]: With dead ends: 8735 [2023-11-19 04:18:03,486 INFO L226 Difference]: Without dead ends: 5471 [2023-11-19 04:18:03,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:18:03,496 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 189 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:03,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 324 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:18:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2023-11-19 04:18:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5178. [2023-11-19 04:18:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 4096 states have (on average 1.191650390625) internal successors, (4881), 4135 states have internal predecessors, (4881), 586 states have call successors, (586), 488 states have call predecessors, (586), 495 states have return successors, (908), 555 states have call predecessors, (908), 584 states have call successors, (908) [2023-11-19 04:18:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 6375 transitions. [2023-11-19 04:18:04,144 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 6375 transitions. Word has length 110 [2023-11-19 04:18:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:04,145 INFO L495 AbstractCegarLoop]: Abstraction has 5178 states and 6375 transitions. [2023-11-19 04:18:04,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 04:18:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 6375 transitions. [2023-11-19 04:18:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-19 04:18:04,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:04,152 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:18:04,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 04:18:04,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:18:04,372 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:04,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1014428681, now seen corresponding path program 1 times [2023-11-19 04:18:04,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:04,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535067815] [2023-11-19 04:18:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 04:18:04,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535067815] [2023-11-19 04:18:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535067815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:18:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794154573] [2023-11-19 04:18:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:04,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:18:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:18:04,974 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:18:04,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 04:18:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:05,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:18:05,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:18:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 04:18:05,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:18:05,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794154573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:05,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:18:05,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-19 04:18:05,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071543089] [2023-11-19 04:18:05,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:05,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:18:05,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:05,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:18:05,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:18:05,284 INFO L87 Difference]: Start difference. First operand 5178 states and 6375 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:18:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:06,016 INFO L93 Difference]: Finished difference Result 8110 states and 9897 transitions. [2023-11-19 04:18:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:18:06,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 116 [2023-11-19 04:18:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:06,035 INFO L225 Difference]: With dead ends: 8110 [2023-11-19 04:18:06,035 INFO L226 Difference]: Without dead ends: 5338 [2023-11-19 04:18:06,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-11-19 04:18:06,044 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 96 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:06,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 742 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:18:06,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2023-11-19 04:18:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 5219. [2023-11-19 04:18:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5219 states, 4131 states have (on average 1.1914790607601065) internal successors, (4922), 4170 states have internal predecessors, (4922), 589 states have call successors, (589), 491 states have call predecessors, (589), 498 states have return successors, (911), 558 states have call predecessors, (911), 587 states have call successors, (911) [2023-11-19 04:18:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5219 states to 5219 states and 6422 transitions. [2023-11-19 04:18:06,700 INFO L78 Accepts]: Start accepts. Automaton has 5219 states and 6422 transitions. Word has length 116 [2023-11-19 04:18:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:06,701 INFO L495 AbstractCegarLoop]: Abstraction has 5219 states and 6422 transitions. [2023-11-19 04:18:06,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:18:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5219 states and 6422 transitions. [2023-11-19 04:18:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-19 04:18:06,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:06,707 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:18:06,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 04:18:06,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:18:06,928 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:06,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:06,928 INFO L85 PathProgramCache]: Analyzing trace with hash -517388373, now seen corresponding path program 1 times [2023-11-19 04:18:06,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:06,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877794060] [2023-11-19 04:18:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:06,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 04:18:07,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:07,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877794060] [2023-11-19 04:18:07,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877794060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:18:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316086103] [2023-11-19 04:18:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:07,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:18:07,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:18:07,605 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:18:07,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 04:18:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:07,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 04:18:07,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:18:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 04:18:08,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:18:08,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316086103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:08,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:18:08,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 25 [2023-11-19 04:18:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181504125] [2023-11-19 04:18:08,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:08,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:18:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:18:08,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2023-11-19 04:18:08,130 INFO L87 Difference]: Start difference. First operand 5219 states and 6422 transitions. Second operand has 9 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:18:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:09,212 INFO L93 Difference]: Finished difference Result 8310 states and 10121 transitions. [2023-11-19 04:18:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:18:09,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 118 [2023-11-19 04:18:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:09,228 INFO L225 Difference]: With dead ends: 8310 [2023-11-19 04:18:09,228 INFO L226 Difference]: Without dead ends: 3938 [2023-11-19 04:18:09,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2023-11-19 04:18:09,240 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 273 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:09,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 393 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:18:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2023-11-19 04:18:09,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3016. [2023-11-19 04:18:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 2362 states have (on average 1.1591871295512277) internal successors, (2738), 2377 states have internal predecessors, (2738), 358 states have call successors, (358), 290 states have call predecessors, (358), 295 states have return successors, (434), 349 states have call predecessors, (434), 356 states have call successors, (434) [2023-11-19 04:18:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3530 transitions. [2023-11-19 04:18:09,687 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3530 transitions. Word has length 118 [2023-11-19 04:18:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:09,688 INFO L495 AbstractCegarLoop]: Abstraction has 3016 states and 3530 transitions. [2023-11-19 04:18:09,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:18:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3530 transitions. [2023-11-19 04:18:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-19 04:18:09,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:09,692 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:18:09,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 04:18:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:18:09,908 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:09,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1934968201, now seen corresponding path program 1 times [2023-11-19 04:18:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355390342] [2023-11-19 04:18:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:09,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 04:18:10,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355390342] [2023-11-19 04:18:10,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355390342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:18:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286369068] [2023-11-19 04:18:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:10,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:18:10,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:18:10,536 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:18:10,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 04:18:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:10,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 04:18:10,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:18:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 04:18:10,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:18:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286369068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:10,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:18:10,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 22 [2023-11-19 04:18:10,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645148297] [2023-11-19 04:18:10,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:10,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:18:10,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:18:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-11-19 04:18:10,992 INFO L87 Difference]: Start difference. First operand 3016 states and 3530 transitions. Second operand has 9 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:18:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:11,886 INFO L93 Difference]: Finished difference Result 6371 states and 7438 transitions. [2023-11-19 04:18:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:18:11,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 119 [2023-11-19 04:18:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:11,898 INFO L225 Difference]: With dead ends: 6371 [2023-11-19 04:18:11,898 INFO L226 Difference]: Without dead ends: 3844 [2023-11-19 04:18:11,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2023-11-19 04:18:11,905 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 380 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:11,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 279 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:18:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2023-11-19 04:18:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3205. [2023-11-19 04:18:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3205 states, 2505 states have (on average 1.1528942115768464) internal successors, (2888), 2520 states have internal predecessors, (2888), 382 states have call successors, (382), 310 states have call predecessors, (382), 317 states have return successors, (438), 375 states have call predecessors, (438), 380 states have call successors, (438) [2023-11-19 04:18:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 3708 transitions. [2023-11-19 04:18:12,377 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 3708 transitions. Word has length 119 [2023-11-19 04:18:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:12,377 INFO L495 AbstractCegarLoop]: Abstraction has 3205 states and 3708 transitions. [2023-11-19 04:18:12,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:18:12,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 3708 transitions. [2023-11-19 04:18:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-19 04:18:12,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:12,382 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:12,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 04:18:12,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-19 04:18:12,597 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:12,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:12,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1134778779, now seen corresponding path program 1 times [2023-11-19 04:18:12,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:12,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082656275] [2023-11-19 04:18:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:12,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-19 04:18:12,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082656275] [2023-11-19 04:18:12,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082656275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:12,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:12,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:18:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853423179] [2023-11-19 04:18:12,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:18:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:12,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:18:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:18:12,794 INFO L87 Difference]: Start difference. First operand 3205 states and 3708 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:18:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:14,294 INFO L93 Difference]: Finished difference Result 9665 states and 11183 transitions. [2023-11-19 04:18:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:18:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 134 [2023-11-19 04:18:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:14,317 INFO L225 Difference]: With dead ends: 9665 [2023-11-19 04:18:14,318 INFO L226 Difference]: Without dead ends: 7775 [2023-11-19 04:18:14,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:18:14,324 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 247 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:14,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 568 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:18:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7775 states. [2023-11-19 04:18:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7775 to 5652. [2023-11-19 04:18:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5652 states, 4405 states have (on average 1.1600454029511917) internal successors, (5110), 4423 states have internal predecessors, (5110), 684 states have call successors, (684), 550 states have call predecessors, (684), 562 states have return successors, (772), 679 states have call predecessors, (772), 682 states have call successors, (772) [2023-11-19 04:18:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 6566 transitions. [2023-11-19 04:18:15,299 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 6566 transitions. Word has length 134 [2023-11-19 04:18:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:15,300 INFO L495 AbstractCegarLoop]: Abstraction has 5652 states and 6566 transitions. [2023-11-19 04:18:15,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:18:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 6566 transitions. [2023-11-19 04:18:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 04:18:15,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:15,307 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:15,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-19 04:18:15,307 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:15,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash 589760967, now seen corresponding path program 1 times [2023-11-19 04:18:15,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:15,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997334939] [2023-11-19 04:18:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:18:15,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:18:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:18:15,457 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:18:15,457 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:18:15,458 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-19 04:18:15,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-19 04:18:15,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-19 04:18:15,464 INFO L445 BasicCegarLoop]: Path program histogram: [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] [2023-11-19 04:18:15,468 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 04:18:15,560 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-11-19 04:18:15,564 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-11-19 04:18:15,580 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-11-19 04:18:15,613 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:18:15 BoogieIcfgContainer [2023-11-19 04:18:15,613 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 04:18:15,614 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 04:18:15,614 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 04:18:15,614 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 04:18:15,615 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:17:38" (3/4) ... [2023-11-19 04:18:15,616 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-19 04:18:15,649 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-11-19 04:18:15,651 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-11-19 04:18:15,659 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-11-19 04:18:15,745 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/witness.graphml [2023-11-19 04:18:15,746 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 04:18:15,746 INFO L158 Benchmark]: Toolchain (without parser) took 39400.88ms. Allocated memory was 169.9MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 126.1MB in the beginning and 686.5MB in the end (delta: -560.4MB). Peak memory consumption was 495.5MB. Max. memory is 16.1GB. [2023-11-19 04:18:15,747 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory was 61.3MB in the beginning and 61.1MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:18:15,747 INFO L158 Benchmark]: CACSL2BoogieTranslator took 562.01ms. Allocated memory is still 169.9MB. Free memory was 125.7MB in the beginning and 107.2MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-19 04:18:15,747 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.30ms. Allocated memory is still 169.9MB. Free memory was 106.8MB in the beginning and 103.9MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 04:18:15,747 INFO L158 Benchmark]: Boogie Preprocessor took 61.47ms. Allocated memory is still 169.9MB. Free memory was 103.9MB in the beginning and 101.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 04:18:15,748 INFO L158 Benchmark]: RCFGBuilder took 1236.76ms. Allocated memory is still 169.9MB. Free memory was 101.3MB in the beginning and 84.8MB in the end (delta: 16.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-19 04:18:15,748 INFO L158 Benchmark]: TraceAbstraction took 37334.70ms. Allocated memory was 169.9MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 84.1MB in the beginning and 704.3MB in the end (delta: -620.2MB). Peak memory consumption was 432.6MB. Max. memory is 16.1GB. [2023-11-19 04:18:15,748 INFO L158 Benchmark]: Witness Printer took 131.63ms. Allocated memory is still 1.2GB. Free memory was 704.3MB in the beginning and 686.5MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-19 04:18:15,750 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory was 61.3MB in the beginning and 61.1MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 562.01ms. Allocated memory is still 169.9MB. Free memory was 125.7MB in the beginning and 107.2MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.30ms. Allocated memory is still 169.9MB. Free memory was 106.8MB in the beginning and 103.9MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.47ms. Allocated memory is still 169.9MB. Free memory was 103.9MB in the beginning and 101.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1236.76ms. Allocated memory is still 169.9MB. Free memory was 101.3MB in the beginning and 84.8MB in the end (delta: 16.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 37334.70ms. Allocated memory was 169.9MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 84.1MB in the beginning and 704.3MB in the end (delta: -620.2MB). Peak memory consumption was 432.6MB. Max. memory is 16.1GB. * Witness Printer took 131.63ms. Allocated memory is still 1.2GB. Free memory was 704.3MB in the beginning and 686.5MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 599]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int fast_clk_edge ; [L33] int slow_clk_edge ; [L34] int q_buf_0 ; [L35] int q_free ; [L36] int q_read_ev ; [L37] int q_write_ev ; [L38] int q_req_up ; [L39] int q_ev ; [L60] int p_num_write ; [L61] int p_last_write ; [L62] int p_dw_st ; [L63] int p_dw_pc ; [L64] int p_dw_i ; [L65] int c_num_read ; [L66] int c_last_read ; [L67] int c_dr_st ; [L68] int c_dr_pc ; [L69] int c_dr_i ; [L202] static int a_t ; [L352] static int t = 0; [L603] int m_pc = 0; [L604] int t1_pc = 0; [L605] int t2_pc = 0; [L606] int m_st ; [L607] int t1_st ; [L608] int t2_st ; [L609] int m_i ; [L610] int t1_i ; [L611] int t2_i ; [L612] int M_E = 2; [L613] int T1_E = 2; [L614] int T2_E = 2; [L615] int E_M = 2; [L616] int E_1 = 2; [L617] int E_2 = 2; [L622] int token ; [L624] int local ; [L1202] COND FALSE !(__VERIFIER_nondet_int()) [L1205] CALL main2() [L1189] int __retres1 ; [L1193] CALL init_model2() [L1103] m_i = 1 [L1104] t1_i = 1 [L1105] t2_i = 1 [L1193] RET init_model2() [L1194] CALL start_simulation2() [L1130] int kernel_st ; [L1131] int tmp ; [L1132] int tmp___0 ; [L1136] kernel_st = 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L1137] FCALL update_channels2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L1138] CALL init_threads2() [L822] COND TRUE m_i == 1 [L823] m_st = 0 [L827] COND TRUE t1_i == 1 [L828] t1_st = 0 [L832] COND TRUE t2_i == 1 [L833] t2_st = 0 [L1138] RET init_threads2() [L1139] CALL fire_delta_events2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L935] COND FALSE !(M_E == 0) [L940] COND FALSE !(T1_E == 0) [L945] COND FALSE !(T2_E == 0) [L950] COND FALSE !(E_M == 0) [L955] COND FALSE !(E_1 == 0) [L960] COND FALSE !(E_2 == 0) [L1139] RET fire_delta_events2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L1140] CALL activate_threads2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L1008] int tmp ; [L1009] int tmp___0 ; [L1010] int tmp___1 ; [L1014] CALL, EXPR is_master_triggered() [L754] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L757] COND FALSE !(m_pc == 1) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L767] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L769] return (__retres1); [L1014] RET, EXPR is_master_triggered() [L1014] tmp = is_master_triggered() [L1016] COND FALSE !(\read(tmp)) [L1022] CALL, EXPR is_transmit1_triggered() [L773] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L776] COND FALSE !(t1_pc == 1) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L786] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L788] return (__retres1); [L1022] RET, EXPR is_transmit1_triggered() [L1022] tmp___0 = is_transmit1_triggered() [L1024] COND FALSE !(\read(tmp___0)) [L1030] CALL, EXPR is_transmit2_triggered() [L792] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L795] COND FALSE !(t2_pc == 1) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L805] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L807] return (__retres1); [L1030] RET, EXPR is_transmit2_triggered() [L1030] tmp___1 = is_transmit2_triggered() [L1032] COND FALSE !(\read(tmp___1)) [L1140] RET activate_threads2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L1141] CALL reset_delta_events2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L973] COND FALSE !(M_E == 1) [L978] COND FALSE !(T1_E == 1) [L983] COND FALSE !(T2_E == 1) [L988] COND FALSE !(E_M == 1) [L993] COND FALSE !(E_1 == 1) [L998] COND FALSE !(E_2 == 1) [L1141] RET reset_delta_events2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L1144] COND TRUE 1 [L1147] kernel_st = 1 [L1148] CALL eval2() [L868] int tmp ; VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L872] COND TRUE 1 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L875] CALL, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L842] int __retres1 ; [L845] COND TRUE m_st == 0 [L846] __retres1 = 1 [L863] return (__retres1); [L875] RET, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L875] tmp = exists_runnable_thread2() [L877] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, tmp=1, token=0] [L882] COND TRUE m_st == 0 [L883] int tmp_ndt_1; [L884] EXPR tmp_ndt_1 = __VERIFIER_nondet_int() [L885] COND FALSE, EXPR !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, tmp=1, tmp_ndt_1=0, token=0] [L882-L893] { int tmp_ndt_1; tmp_ndt_1 = __VERIFIER_nondet_int(); if (tmp_ndt_1) { { m_st = 1; master(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t=0, tmp=1, token=0] [L896] COND TRUE t1_st == 0 [L897] int tmp_ndt_2; [L898] EXPR tmp_ndt_2 = __VERIFIER_nondet_int() [L899] COND TRUE, EXPR \read(tmp_ndt_2) [L901] EXPR t1_st = 1 [L902] CALL, EXPR transmit1() [L685] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=0, t1_st=1, t2_i=1, t2_pc=0, t2_st=0, t=0, token=0] [L696] COND TRUE 1 [L698] t1_pc = 1 [L699] t1_st = 2 [L902] RET, EXPR transmit1() [L896-L907] { int tmp_ndt_2; tmp_ndt_2 = __VERIFIER_nondet_int(); if (tmp_ndt_2) { { t1_st = 1; transmit1(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=0, t2_st=0, t=0, tmp=1, token=0] [L910] COND TRUE t2_st == 0 [L911] int tmp_ndt_3; [L912] EXPR tmp_ndt_3 = __VERIFIER_nondet_int() [L913] COND TRUE, EXPR \read(tmp_ndt_3) [L915] EXPR t2_st = 1 [L916] CALL, EXPR transmit2() [L721] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=0, t2_st=1, t=0, token=0] [L732] COND TRUE 1 [L734] t2_pc = 1 [L735] t2_st = 2 [L916] RET, EXPR transmit2() [L910-L921] { int tmp_ndt_3; tmp_ndt_3 = __VERIFIER_nondet_int(); if (tmp_ndt_3) { { t2_st = 1; transmit2(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp=1, token=0] [L872] COND TRUE 1 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp=1, token=0] [L875] CALL, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L842] int __retres1 ; [L845] COND TRUE m_st == 0 [L846] __retres1 = 1 [L863] return (__retres1); [L875] RET, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp=1, token=0] [L875] tmp = exists_runnable_thread2() [L877] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp=1, token=0] [L882] COND TRUE m_st == 0 [L883] int tmp_ndt_1; [L884] EXPR tmp_ndt_1 = __VERIFIER_nondet_int() [L885] COND TRUE, EXPR \read(tmp_ndt_1) [L887] EXPR m_st = 1 [L888] CALL, EXPR master() [L627] int tmp_var = __VERIFIER_nondet_int(); [L629] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=0, token=0] [L640] COND TRUE 1 [L643] token = __VERIFIER_nondet_int() [L644] local = token [L645] E_1 = 1 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=0, token=0] [L646] CALL immediate_notify() VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L1046] CALL activate_threads2() VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L1008] int tmp ; [L1009] int tmp___0 ; [L1010] int tmp___1 ; [L1014] CALL, EXPR is_master_triggered() [L754] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L757] COND FALSE !(m_pc == 1) VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L767] __retres1 = 0 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L769] return (__retres1); [L1014] RET, EXPR is_master_triggered() [L1014] tmp = is_master_triggered() [L1016] COND FALSE !(\read(tmp)) [L1022] CALL, EXPR is_transmit1_triggered() [L773] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L776] COND TRUE t1_pc == 1 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L777] COND TRUE E_1 == 1 [L778] __retres1 = 1 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L788] return (__retres1); [L1022] RET, EXPR is_transmit1_triggered() [L1022] tmp___0 = is_transmit1_triggered() [L1024] COND TRUE \read(tmp___0) [L1025] t1_st = 0 [L1030] CALL, EXPR is_transmit2_triggered() [L792] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L795] COND TRUE t2_pc == 1 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L796] COND FALSE !(E_2 == 1) VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L805] __retres1 = 0 VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L807] return (__retres1); [L1030] RET, EXPR is_transmit2_triggered() [L1030] tmp___1 = is_transmit2_triggered() [L1032] COND FALSE !(\read(tmp___1)) [L1046] RET activate_threads2() VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L646] RET immediate_notify() VAL [E_1=1, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=0, token=0] [L647] E_1 = 2 [L648] m_pc = 1 [L649] m_st = 2 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=0, token=0] [L888] RET, EXPR master() [L882-L893] { int tmp_ndt_1; tmp_ndt_1 = __VERIFIER_nondet_int(); if (tmp_ndt_1) { { m_st = 1; master(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp=1, token=0] [L896] COND TRUE t1_st == 0 [L897] int tmp_ndt_2; [L898] EXPR tmp_ndt_2 = __VERIFIER_nondet_int() [L899] COND TRUE, EXPR \read(tmp_ndt_2) [L901] EXPR t1_st = 1 [L902] CALL, EXPR transmit1() [L685] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=0] [L688] COND TRUE t1_pc == 1 [L704] token += 1 [L705] E_2 = 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L706] CALL immediate_notify() VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L1046] CALL activate_threads2() VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L1008] int tmp ; [L1009] int tmp___0 ; [L1010] int tmp___1 ; [L1014] CALL, EXPR is_master_triggered() [L754] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L757] COND TRUE m_pc == 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L758] COND FALSE !(E_M == 1) VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L767] __retres1 = 0 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L769] return (__retres1); [L1014] RET, EXPR is_master_triggered() [L1014] tmp = is_master_triggered() [L1016] COND FALSE !(\read(tmp)) [L1022] CALL, EXPR is_transmit1_triggered() [L773] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L776] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L777] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L786] __retres1 = 0 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L788] return (__retres1); [L1022] RET, EXPR is_transmit1_triggered() [L1022] tmp___0 = is_transmit1_triggered() [L1024] COND FALSE !(\read(tmp___0)) [L1030] CALL, EXPR is_transmit2_triggered() [L792] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L795] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L796] COND TRUE E_2 == 1 [L797] __retres1 = 1 VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t=0, token=1] [L807] return (__retres1); [L1030] RET, EXPR is_transmit2_triggered() [L1030] tmp___1 = is_transmit2_triggered() [L1032] COND TRUE \read(tmp___1) [L1033] t2_st = 0 [L1046] RET activate_threads2() VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t=0, token=1] [L706] RET immediate_notify() VAL [E_1=2, E_2=1, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t=0, token=1] [L707] E_2 = 2 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t=0, token=1] [L696] COND TRUE 1 [L698] t1_pc = 1 [L699] t1_st = 2 [L902] RET, EXPR transmit1() [L896-L907] { int tmp_ndt_2; tmp_ndt_2 = __VERIFIER_nondet_int(); if (tmp_ndt_2) { { t1_st = 1; transmit1(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=0, t=0, tmp=1, token=1] [L910] COND TRUE t2_st == 0 [L911] int tmp_ndt_3; [L912] EXPR tmp_ndt_3 = __VERIFIER_nondet_int() [L913] COND TRUE, EXPR \read(tmp_ndt_3) [L915] EXPR t2_st = 1 [L916] CALL, EXPR transmit2() [L721] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=1] [L724] COND TRUE t2_pc == 1 [L740] token += 1 [L741] E_M = 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L742] CALL immediate_notify() VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L1046] CALL activate_threads2() VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L1008] int tmp ; [L1009] int tmp___0 ; [L1010] int tmp___1 ; [L1014] CALL, EXPR is_master_triggered() [L754] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L757] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L758] COND TRUE E_M == 1 [L759] __retres1 = 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L769] return (__retres1); [L1014] RET, EXPR is_master_triggered() [L1014] tmp = is_master_triggered() [L1016] COND TRUE \read(tmp) [L1017] m_st = 0 [L1022] CALL, EXPR is_transmit1_triggered() [L773] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L776] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L777] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L786] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L788] return (__retres1); [L1022] RET, EXPR is_transmit1_triggered() [L1022] tmp___0 = is_transmit1_triggered() [L1024] COND FALSE !(\read(tmp___0)) [L1030] CALL, EXPR is_transmit2_triggered() [L792] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L795] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L796] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L805] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L807] return (__retres1); [L1030] RET, EXPR is_transmit2_triggered() [L1030] tmp___1 = is_transmit2_triggered() [L1032] COND FALSE !(\read(tmp___1)) [L1046] RET activate_threads2() VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L742] RET immediate_notify() VAL [E_1=2, E_2=2, E_M=1, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L743] E_M = 2 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t=0, token=2] [L732] COND TRUE 1 [L734] t2_pc = 1 [L735] t2_st = 2 [L916] RET, EXPR transmit2() [L910-L921] { int tmp_ndt_3; tmp_ndt_3 = __VERIFIER_nondet_int(); if (tmp_ndt_3) { { t2_st = 1; transmit2(); } } else { } } VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp=1, token=2] [L872] COND TRUE 1 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp=1, token=2] [L875] CALL, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=2] [L842] int __retres1 ; [L845] COND TRUE m_st == 0 [L846] __retres1 = 1 [L863] return (__retres1); [L875] RET, EXPR exists_runnable_thread2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp=1, token=2] [L875] tmp = exists_runnable_thread2() [L877] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp=1, token=2] [L882] COND TRUE m_st == 0 [L883] int tmp_ndt_1; [L884] tmp_ndt_1 = __VERIFIER_nondet_int() [L885] COND TRUE \read(tmp_ndt_1) [L887] m_st = 1 [L888] CALL master() [L627] int tmp_var = __VERIFIER_nondet_int(); [L629] COND FALSE !(m_pc == 0) VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=5, token=2] [L632] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=5, token=2] [L654] COND FALSE !(token != local + 2) [L659] COND TRUE tmp_var <= 5 [L660] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=5, token=2] [L665] COND TRUE tmp_var <= 5 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=5, token=2] [L666] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=5, token=2] [L667] COND TRUE tmp_var == 5 VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, tmp_var=5, token=2] [L668] CALL error2() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=2] [L599] reach_error() VAL [E_1=2, E_2=2, E_M=2, M_E=2, T1_E=2, T2_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, fast_clk_edge=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, slow_clk_edge=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t=0, token=2] - UnprovableResult [Line: 27]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 16 procedures, 166 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 37.1s, OverallIterations: 27, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.2s, AutomataDifference: 14.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5055 SdHoareTripleChecker+Valid, 4.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4966 mSDsluCounter, 9405 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5341 mSDsCounter, 1227 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4766 IncrementalHoareTripleChecker+Invalid, 5993 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1227 mSolverCounterUnsat, 4064 mSDtfsCounter, 4766 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1932 GetRequests, 1727 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5652occurred in iteration=26, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 8.3s AutomataMinimizationTime, 26 MinimizatonAttempts, 6812 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 4205 NumberOfCodeBlocks, 4117 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 4027 ConstructedInterpolants, 0 QuantifiedInterpolants, 8172 SizeOfPredicates, 13 NumberOfNonLiveVariables, 7274 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 41 InterpolantComputations, 26 PerfectInterpolantSequences, 2002/2255 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-19 04:18:15,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccd7b1a1-a91f-49b2-954a-a780aec626c4/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE