./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/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_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/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_2c0b5389-2624-4dd7-87e4-2c390b181290/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 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:07:29,223 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:07:29,354 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:07:29,366 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:07:29,366 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:07:29,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:07:29,406 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:07:29,407 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:07:29,408 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:07:29,415 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:07:29,415 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:07:29,416 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:07:29,416 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:07:29,418 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:07:29,418 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:07:29,419 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:07:29,419 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:07:29,420 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:07:29,420 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:07:29,421 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:07:29,421 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:07:29,422 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:07:29,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:07:29,423 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:07:29,424 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:07:29,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:07:29,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:07:29,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:07:29,425 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:07:29,426 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:07:29,427 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:07:29,427 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:07:29,427 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:07:29,428 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:07:29,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:07:29,428 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:07:29,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:07:29,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:07:29,429 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:07:29,429 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:07:29,429 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:07:29,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:07:29,430 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:07:29,430 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:07:29,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:07:29,431 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_2c0b5389-2624-4dd7-87e4-2c390b181290/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc [2023-11-19 05:07:29,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:07:29,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:07:29,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:07:29,814 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:07:29,815 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:07:29,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2023-11-19 05:07:32,961 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:07:33,164 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:07:33,165 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2023-11-19 05:07:33,179 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/data/6a85974c1/36197e0aa15a46cab1c9b4d2ec2686f6/FLAG24ac5216a [2023-11-19 05:07:33,201 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/data/6a85974c1/36197e0aa15a46cab1c9b4d2ec2686f6 [2023-11-19 05:07:33,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:07:33,210 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:07:33,211 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:07:33,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:07:33,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:07:33,218 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18dd7952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33, skipping insertion in model container [2023-11-19 05:07:33,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,291 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:07:33,455 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_2c0b5389-2624-4dd7-87e4-2c390b181290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2023-11-19 05:07:33,537 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_2c0b5389-2624-4dd7-87e4-2c390b181290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2023-11-19 05:07:33,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:07:33,646 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:07:33,662 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_2c0b5389-2624-4dd7-87e4-2c390b181290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2023-11-19 05:07:33,681 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_2c0b5389-2624-4dd7-87e4-2c390b181290/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2023-11-19 05:07:33,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:07:33,734 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:07:33,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33 WrapperNode [2023-11-19 05:07:33,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:07:33,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:07:33,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:07:33,736 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:07:33,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,772 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,854 INFO L138 Inliner]: procedures = 61, calls = 69, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 590 [2023-11-19 05:07:33,855 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:07:33,856 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:07:33,856 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:07:33,856 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:07:33,865 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,877 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,877 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,914 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:07:33,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:07:33,934 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:07:33,934 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:07:33,935 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (1/1) ... [2023-11-19 05:07:33,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:07:33,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:33,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:07:34,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:07:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:07:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:07:34,034 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:07:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-19 05:07:34,037 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-19 05:07:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 05:07:34,037 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 05:07:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 05:07:34,037 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 05:07:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-19 05:07:34,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-19 05:07:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 05:07:34,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 05:07:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 05:07:34,038 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 05:07:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-19 05:07:34,039 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-19 05:07:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-19 05:07:34,040 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-19 05:07:34,040 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-19 05:07:34,040 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-19 05:07:34,040 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 05:07:34,041 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 05:07:34,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:07:34,042 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 05:07:34,042 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 05:07:34,042 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-19 05:07:34,043 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-19 05:07:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:07:34,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:07:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 05:07:34,043 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 05:07:34,191 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:07:34,193 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:07:34,943 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:07:35,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:07:35,265 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-19 05:07:35,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:07:35 BoogieIcfgContainer [2023-11-19 05:07:35,272 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:07:35,274 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:07:35,274 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:07:35,277 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:07:35,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:07:33" (1/3) ... [2023-11-19 05:07:35,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630d35f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:07:35, skipping insertion in model container [2023-11-19 05:07:35,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:33" (2/3) ... [2023-11-19 05:07:35,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630d35f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:07:35, skipping insertion in model container [2023-11-19 05:07:35,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:07:35" (3/3) ... [2023-11-19 05:07:35,280 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2023-11-19 05:07:35,299 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:07:35,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:07:35,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:07:35,359 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;@6dbd3777, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:07:35,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:07:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 128 states have (on average 1.484375) internal successors, (190), 134 states have internal predecessors, (190), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-19 05:07:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:07:35,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:35,378 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 05:07:35,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:35,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash -849930765, now seen corresponding path program 1 times [2023-11-19 05:07:35,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:35,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555232877] [2023-11-19 05:07:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:35,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:35,785 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 05:07:35,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:35,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555232877] [2023-11-19 05:07:35,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555232877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:35,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:35,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:07:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011456733] [2023-11-19 05:07:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:35,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:07:35,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:35,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:07:35,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:07:35,828 INFO L87 Difference]: Start difference. First operand has 177 states, 128 states have (on average 1.484375) internal successors, (190), 134 states have internal predecessors, (190), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 05:07:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:36,296 INFO L93 Difference]: Finished difference Result 405 states and 579 transitions. [2023-11-19 05:07:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:07:36,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2023-11-19 05:07:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:36,310 INFO L225 Difference]: With dead ends: 405 [2023-11-19 05:07:36,310 INFO L226 Difference]: Without dead ends: 232 [2023-11-19 05:07:36,315 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 05:07:36,318 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 302 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:36,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 434 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:07:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-19 05:07:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2023-11-19 05:07:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 163 states have (on average 1.3680981595092025) internal successors, (223), 167 states have internal predecessors, (223), 40 states have call successors, (40), 21 states have call predecessors, (40), 20 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-19 05:07:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 301 transitions. [2023-11-19 05:07:36,412 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 301 transitions. Word has length 45 [2023-11-19 05:07:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:36,413 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 301 transitions. [2023-11-19 05:07:36,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 05:07:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 301 transitions. [2023-11-19 05:07:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:07:36,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:36,425 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 05:07:36,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:07:36,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:36,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash 69043858, now seen corresponding path program 1 times [2023-11-19 05:07:36,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:36,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927616413] [2023-11-19 05:07:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:36,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:36,773 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 05:07:36,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:36,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927616413] [2023-11-19 05:07:36,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927616413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:36,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:36,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:07:36,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554198563] [2023-11-19 05:07:36,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:36,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:07:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:36,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:07:36,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:07:36,778 INFO L87 Difference]: Start difference. First operand 225 states and 301 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 05:07:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:37,726 INFO L93 Difference]: Finished difference Result 406 states and 522 transitions. [2023-11-19 05:07:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:07:37,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-11-19 05:07:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:37,736 INFO L225 Difference]: With dead ends: 406 [2023-11-19 05:07:37,737 INFO L226 Difference]: Without dead ends: 290 [2023-11-19 05:07:37,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:07:37,745 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 362 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:37,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 721 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:07:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-19 05:07:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 277. [2023-11-19 05:07:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 200 states have (on average 1.35) internal successors, (270), 204 states have internal predecessors, (270), 48 states have call successors, (48), 28 states have call predecessors, (48), 27 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-19 05:07:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 364 transitions. [2023-11-19 05:07:37,817 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 364 transitions. Word has length 45 [2023-11-19 05:07:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:37,818 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 364 transitions. [2023-11-19 05:07:37,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 05:07:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 364 transitions. [2023-11-19 05:07:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:07:37,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:37,821 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] [2023-11-19 05:07:37,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:07:37,822 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:37,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1141232728, now seen corresponding path program 1 times [2023-11-19 05:07:37,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:37,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268302484] [2023-11-19 05:07:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:37,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:37,983 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 05:07:37,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:37,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268302484] [2023-11-19 05:07:37,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268302484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:37,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:37,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:07:37,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896854764] [2023-11-19 05:07:37,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:37,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:07:37,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:37,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:07:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:07:37,987 INFO L87 Difference]: Start difference. First operand 277 states and 364 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:07:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:38,608 INFO L93 Difference]: Finished difference Result 740 states and 1072 transitions. [2023-11-19 05:07:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:07:38,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-11-19 05:07:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:38,615 INFO L225 Difference]: With dead ends: 740 [2023-11-19 05:07:38,615 INFO L226 Difference]: Without dead ends: 642 [2023-11-19 05:07:38,617 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 05:07:38,619 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 728 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:38,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 697 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:07:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-11-19 05:07:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 631. [2023-11-19 05:07:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 477 states have (on average 1.3836477987421383) internal successors, (660), 484 states have internal predecessors, (660), 101 states have call successors, (101), 52 states have call predecessors, (101), 51 states have return successors, (129), 96 states have call predecessors, (129), 99 states have call successors, (129) [2023-11-19 05:07:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 890 transitions. [2023-11-19 05:07:38,706 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 890 transitions. Word has length 43 [2023-11-19 05:07:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:38,707 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 890 transitions. [2023-11-19 05:07:38,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:07:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 890 transitions. [2023-11-19 05:07:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:07:38,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:38,709 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 05:07:38,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:07:38,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:38,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2021547020, now seen corresponding path program 1 times [2023-11-19 05:07:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:38,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504032665] [2023-11-19 05:07:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:38,759 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 05:07:38,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:38,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504032665] [2023-11-19 05:07:38,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504032665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:38,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:38,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029015300] [2023-11-19 05:07:38,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:38,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:38,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:38,762 INFO L87 Difference]: Start difference. First operand 631 states and 890 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 05:07:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:38,929 INFO L93 Difference]: Finished difference Result 959 states and 1296 transitions. [2023-11-19 05:07:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:38,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 46 [2023-11-19 05:07:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:38,937 INFO L225 Difference]: With dead ends: 959 [2023-11-19 05:07:38,937 INFO L226 Difference]: Without dead ends: 790 [2023-11-19 05:07:38,938 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 05:07:38,949 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 213 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:38,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 260 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:07:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-11-19 05:07:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 771. [2023-11-19 05:07:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 572 states have (on average 1.3461538461538463) internal successors, (770), 579 states have internal predecessors, (770), 125 states have call successors, (125), 73 states have call predecessors, (125), 72 states have return successors, (153), 120 states have call predecessors, (153), 123 states have call successors, (153) [2023-11-19 05:07:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1048 transitions. [2023-11-19 05:07:39,081 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1048 transitions. Word has length 46 [2023-11-19 05:07:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:39,082 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1048 transitions. [2023-11-19 05:07:39,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 05:07:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1048 transitions. [2023-11-19 05:07:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:07:39,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:39,084 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] [2023-11-19 05:07:39,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:07:39,084 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:39,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1728111801, now seen corresponding path program 1 times [2023-11-19 05:07:39,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:39,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644150598] [2023-11-19 05:07:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:39,130 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 05:07:39,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:39,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644150598] [2023-11-19 05:07:39,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644150598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:39,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:39,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:39,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496866926] [2023-11-19 05:07:39,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:39,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:39,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:39,134 INFO L87 Difference]: Start difference. First operand 771 states and 1048 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 05:07:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:39,294 INFO L93 Difference]: Finished difference Result 1141 states and 1493 transitions. [2023-11-19 05:07:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:39,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 47 [2023-11-19 05:07:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:39,301 INFO L225 Difference]: With dead ends: 1141 [2023-11-19 05:07:39,302 INFO L226 Difference]: Without dead ends: 878 [2023-11-19 05:07:39,303 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 05:07:39,304 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 67 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:39,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 381 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:07:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2023-11-19 05:07:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 872. [2023-11-19 05:07:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 643 states have (on average 1.3343701399688959) internal successors, (858), 650 states have internal predecessors, (858), 141 states have call successors, (141), 87 states have call predecessors, (141), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2023-11-19 05:07:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1168 transitions. [2023-11-19 05:07:39,404 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1168 transitions. Word has length 47 [2023-11-19 05:07:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:39,404 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1168 transitions. [2023-11-19 05:07:39,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 05:07:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1168 transitions. [2023-11-19 05:07:39,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 05:07:39,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:39,407 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:39,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:07:39,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:39,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:39,408 INFO L85 PathProgramCache]: Analyzing trace with hash -255780103, now seen corresponding path program 1 times [2023-11-19 05:07:39,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:39,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87705051] [2023-11-19 05:07:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:39,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:07:39,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:39,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87705051] [2023-11-19 05:07:39,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87705051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:39,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:39,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:07:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677184650] [2023-11-19 05:07:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:39,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:07:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:39,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:07:39,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:07:39,480 INFO L87 Difference]: Start difference. First operand 872 states and 1168 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:07:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:39,810 INFO L93 Difference]: Finished difference Result 979 states and 1294 transitions. [2023-11-19 05:07:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:07:39,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-11-19 05:07:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:39,818 INFO L225 Difference]: With dead ends: 979 [2023-11-19 05:07:39,818 INFO L226 Difference]: Without dead ends: 976 [2023-11-19 05:07:39,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:07:39,820 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 386 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:39,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 243 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:07:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2023-11-19 05:07:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 871. [2023-11-19 05:07:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 643 states have (on average 1.3297045101088647) internal successors, (855), 649 states have internal predecessors, (855), 140 states have call successors, (140), 87 states have call predecessors, (140), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2023-11-19 05:07:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1164 transitions. [2023-11-19 05:07:39,937 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1164 transitions. Word has length 54 [2023-11-19 05:07:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:39,938 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1164 transitions. [2023-11-19 05:07:39,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:07:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1164 transitions. [2023-11-19 05:07:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 05:07:39,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:39,941 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:39,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:07:39,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:39,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash 659899810, now seen corresponding path program 1 times [2023-11-19 05:07:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:39,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434304658] [2023-11-19 05:07:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:39,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:07:40,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:40,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434304658] [2023-11-19 05:07:40,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434304658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:07:40,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819494339] [2023-11-19 05:07:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:40,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:07:40,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:40,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:07:40,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:07:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:40,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:07:40,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:07:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:07:40,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:07:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:07:40,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819494339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:07:40,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685928240] [2023-11-19 05:07:40,708 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-19 05:07:40,709 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:07:40,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:07:40,719 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:07:40,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:07:45,624 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 131 for LOIs [2023-11-19 05:07:45,710 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 127 for LOIs [2023-11-19 05:07:45,785 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 135 for LOIs [2023-11-19 05:07:46,710 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 131 for LOIs [2023-11-19 05:07:46,966 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 131 for LOIs [2023-11-19 05:07:47,164 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 131 for LOIs [2023-11-19 05:07:47,238 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 138 for LOIs [2023-11-19 05:07:47,320 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:08:01,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1685928240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:08:01,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:08:01,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-19 05:08:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828294147] [2023-11-19 05:08:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:08:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-19 05:08:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:08:01,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-19 05:08:01,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 05:08:01,732 INFO L87 Difference]: Start difference. First operand 871 states and 1164 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 05:08:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:08:21,993 INFO L93 Difference]: Finished difference Result 1328 states and 1697 transitions. [2023-11-19 05:08:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-19 05:08:21,994 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-11-19 05:08:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:08:22,000 INFO L225 Difference]: With dead ends: 1328 [2023-11-19 05:08:22,000 INFO L226 Difference]: Without dead ends: 920 [2023-11-19 05:08:22,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-11-19 05:08:22,005 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 177 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 3749 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 3893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:08:22,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1881 Invalid, 3893 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [144 Valid, 3749 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-19 05:08:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2023-11-19 05:08:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2023-11-19 05:08:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 669 states have (on average 1.3198804185351272) internal successors, (883), 675 states have internal predecessors, (883), 142 states have call successors, (142), 93 states have call predecessors, (142), 92 states have return successors, (171), 138 states have call predecessors, (171), 141 states have call successors, (171) [2023-11-19 05:08:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1196 transitions. [2023-11-19 05:08:22,120 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1196 transitions. Word has length 55 [2023-11-19 05:08:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:08:22,120 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1196 transitions. [2023-11-19 05:08:22,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 05:08:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1196 transitions. [2023-11-19 05:08:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 05:08:22,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:22,123 INFO L195 NwaCegarLoop]: trace histogram [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 05:08:22,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:08:22,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:22,345 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:08:22,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:22,345 INFO L85 PathProgramCache]: Analyzing trace with hash -8197945, now seen corresponding path program 1 times [2023-11-19 05:08:22,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:22,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933913996] [2023-11-19 05:08:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:22,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:08:22,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:22,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933913996] [2023-11-19 05:08:22,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933913996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:08:22,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:08:22,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:08:22,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472097333] [2023-11-19 05:08:22,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:08:22,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:08:22,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:08:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:08:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:08:22,424 INFO L87 Difference]: Start difference. First operand 905 states and 1196 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 05:08:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:08:22,622 INFO L93 Difference]: Finished difference Result 1352 states and 1732 transitions. [2023-11-19 05:08:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:08:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 61 [2023-11-19 05:08:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:08:22,630 INFO L225 Difference]: With dead ends: 1352 [2023-11-19 05:08:22,630 INFO L226 Difference]: Without dead ends: 1086 [2023-11-19 05:08:22,631 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 05:08:22,632 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 43 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:08:22,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 432 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:08:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2023-11-19 05:08:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 957. [2023-11-19 05:08:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 711 states have (on average 1.3164556962025316) internal successors, (936), 717 states have internal predecessors, (936), 147 states have call successors, (147), 98 states have call predecessors, (147), 97 states have return successors, (176), 143 states have call predecessors, (176), 146 states have call successors, (176) [2023-11-19 05:08:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1259 transitions. [2023-11-19 05:08:22,752 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1259 transitions. Word has length 61 [2023-11-19 05:08:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:08:22,752 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1259 transitions. [2023-11-19 05:08:22,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 05:08:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1259 transitions. [2023-11-19 05:08:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 05:08:22,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:22,755 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:08:22,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:08:22,755 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:08:22,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:22,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1203615336, now seen corresponding path program 1 times [2023-11-19 05:08:22,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:22,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309390914] [2023-11-19 05:08:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:22,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:08:22,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:22,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309390914] [2023-11-19 05:08:22,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309390914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:08:22,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:08:22,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:08:22,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802732057] [2023-11-19 05:08:22,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:08:22,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:08:22,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:08:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:08:22,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:08:22,944 INFO L87 Difference]: Start difference. First operand 957 states and 1259 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:08:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:08:23,589 INFO L93 Difference]: Finished difference Result 1631 states and 2046 transitions. [2023-11-19 05:08:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:08:23,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2023-11-19 05:08:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:08:23,598 INFO L225 Difference]: With dead ends: 1631 [2023-11-19 05:08:23,598 INFO L226 Difference]: Without dead ends: 1218 [2023-11-19 05:08:23,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:08:23,601 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 345 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:08:23,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 679 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:08:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2023-11-19 05:08:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1183. [2023-11-19 05:08:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 862 states have (on average 1.2865429234338748) internal successors, (1109), 868 states have internal predecessors, (1109), 187 states have call successors, (187), 133 states have call predecessors, (187), 132 states have return successors, (216), 183 states have call predecessors, (216), 186 states have call successors, (216) [2023-11-19 05:08:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1512 transitions. [2023-11-19 05:08:23,757 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1512 transitions. Word has length 63 [2023-11-19 05:08:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:08:23,757 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1512 transitions. [2023-11-19 05:08:23,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:08:23,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1512 transitions. [2023-11-19 05:08:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 05:08:23,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:23,760 INFO L195 NwaCegarLoop]: trace histogram [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 05:08:23,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:08:23,760 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:08:23,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:23,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1025657495, now seen corresponding path program 1 times [2023-11-19 05:08:23,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:23,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027939613] [2023-11-19 05:08:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:23,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:08:23,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:23,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027939613] [2023-11-19 05:08:23,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027939613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:08:23,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441310812] [2023-11-19 05:08:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:23,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:23,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:08:23,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:08:23,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0b5389-2624-4dd7-87e4-2c390b181290/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:08:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:23,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:08:23,999 INFO L285 TraceCheckSpWp]: Computing forward predicates...