./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh --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 fee2fbeec3a60e447cd74345d2f8a46dc28fcea89eab2880c2a2ccd5802bfaa0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:01:19,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:01:19,342 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:01:19,346 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:01:19,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:01:19,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:01:19,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:01:19,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:01:19,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:01:19,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:01:19,374 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:01:19,374 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:01:19,375 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:01:19,376 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:01:19,376 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:01:19,377 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:01:19,377 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:01:19,378 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:01:19,378 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:01:19,379 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:01:19,379 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:01:19,380 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:01:19,381 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:01:19,381 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:01:19,382 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:01:19,382 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:01:19,383 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:01:19,383 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:01:19,383 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:01:19,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:01:19,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:01:19,385 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:01:19,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:01:19,385 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:01:19,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:01:19,386 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:01:19,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:01:19,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:01:19,386 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:01:19,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:01:19,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:01:19,387 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:01:19,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:01:19,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:01:19,388 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:01:19,388 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:01:19,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:01:19,388 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_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fee2fbeec3a60e447cd74345d2f8a46dc28fcea89eab2880c2a2ccd5802bfaa0 [2023-12-02 14:01:19,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:01:19,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:01:19,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:01:19,653 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:01:19,653 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:01:19,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2023-12-02 14:01:22,725 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:01:22,940 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:01:22,940 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2023-12-02 14:01:22,958 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/data/4cf27f4d0/6c275f49e64e44b2b65d414b87fce822/FLAG7e2b4713a [2023-12-02 14:01:22,974 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/data/4cf27f4d0/6c275f49e64e44b2b65d414b87fce822 [2023-12-02 14:01:22,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:01:22,979 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:01:22,981 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:01:22,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:01:22,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:01:22,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:01:22" (1/1) ... [2023-12-02 14:01:22,989 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@806f4b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:22, skipping insertion in model container [2023-12-02 14:01:22,990 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:01:22" (1/1) ... [2023-12-02 14:01:23,045 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:01:23,187 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_e8ba52f1-85ce-45ba-a9bc-53d16005decc/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[913,926] [2023-12-02 14:01:23,237 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_e8ba52f1-85ce-45ba-a9bc-53d16005decc/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[5977,5990] [2023-12-02 14:01:23,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:01:23,323 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:01:23,338 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_e8ba52f1-85ce-45ba-a9bc-53d16005decc/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[913,926] [2023-12-02 14:01:23,353 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_e8ba52f1-85ce-45ba-a9bc-53d16005decc/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[5977,5990] [2023-12-02 14:01:23,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:01:23,418 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:01:23,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23 WrapperNode [2023-12-02 14:01:23,418 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:01:23,420 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:01:23,420 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:01:23,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:01:23,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,446 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,491 INFO L138 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 725 [2023-12-02 14:01:23,492 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:01:23,493 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:01:23,493 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:01:23,493 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:01:23,503 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,504 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,509 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,510 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,549 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:01:23,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:01:23,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:01:23,557 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:01:23,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (1/1) ... [2023-12-02 14:01:23,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:01:23,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:01:23,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:01:23,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:01:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:01:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 14:01:23,627 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 14:01:23,627 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-12-02 14:01:23,627 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-12-02 14:01:23,627 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 14:01:23,628 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 14:01:23,628 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 14:01:23,628 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 14:01:23,629 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 14:01:23,629 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 14:01:23,629 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 14:01:23,629 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 14:01:23,630 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 14:01:23,630 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 14:01:23,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:01:23,630 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 14:01:23,630 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 14:01:23,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:01:23,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:01:23,631 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 14:01:23,631 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 14:01:23,764 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:01:23,767 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:01:24,501 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:01:24,877 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:01:24,878 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-12-02 14:01:24,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:01:24 BoogieIcfgContainer [2023-12-02 14:01:24,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:01:24,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:01:24,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:01:24,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:01:24,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:01:22" (1/3) ... [2023-12-02 14:01:24,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8c1fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:01:24, skipping insertion in model container [2023-12-02 14:01:24,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:01:23" (2/3) ... [2023-12-02 14:01:24,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8c1fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:01:24, skipping insertion in model container [2023-12-02 14:01:24,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:01:24" (3/3) ... [2023-12-02 14:01:24,889 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2023-12-02 14:01:24,910 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:01:24,910 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 14:01:24,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:01:24,965 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;@4c8bf8e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:01:24,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 14:01:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 180 states, 142 states have (on average 1.5211267605633803) internal successors, (216), 147 states have internal predecessors, (216), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-02 14:01:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 14:01:24,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:24,981 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] [2023-12-02 14:01:24,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:24,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:24,987 INFO L85 PathProgramCache]: Analyzing trace with hash -28900366, now seen corresponding path program 1 times [2023-12-02 14:01:24,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:24,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890686448] [2023-12-02 14:01:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:24,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:01:25,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:25,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890686448] [2023-12-02 14:01:25,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890686448] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:01:25,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:01:25,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:01:25,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859186297] [2023-12-02 14:01:25,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:01:25,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:01:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:25,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:01:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:01:25,330 INFO L87 Difference]: Start difference. First operand has 180 states, 142 states have (on average 1.5211267605633803) internal successors, (216), 147 states have internal predecessors, (216), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:01:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:25,526 INFO L93 Difference]: Finished difference Result 393 states and 584 transitions. [2023-12-02 14:01:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:01:25,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 14:01:25,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:25,542 INFO L225 Difference]: With dead ends: 393 [2023-12-02 14:01:25,542 INFO L226 Difference]: Without dead ends: 213 [2023-12-02 14:01:25,546 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 [2023-12-02 14:01:25,550 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 235 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:25,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 282 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:01:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-12-02 14:01:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2023-12-02 14:01:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 168 states have (on average 1.4464285714285714) internal successors, (243), 171 states have internal predecessors, (243), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-12-02 14:01:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 299 transitions. [2023-12-02 14:01:25,620 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 299 transitions. Word has length 28 [2023-12-02 14:01:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:25,621 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 299 transitions. [2023-12-02 14:01:25,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:01:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 299 transitions. [2023-12-02 14:01:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 14:01:25,625 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:25,625 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] [2023-12-02 14:01:25,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:01:25,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:25,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash 486813715, now seen corresponding path program 1 times [2023-12-02 14:01:25,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:25,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954330026] [2023-12-02 14:01:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:25,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:01:25,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:25,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954330026] [2023-12-02 14:01:25,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954330026] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:01:25,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:01:25,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:01:25,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043421865] [2023-12-02 14:01:25,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:01:25,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:01:25,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:01:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:01:25,708 INFO L87 Difference]: Start difference. First operand 209 states and 299 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:01:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:25,835 INFO L93 Difference]: Finished difference Result 365 states and 516 transitions. [2023-12-02 14:01:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:01:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-12-02 14:01:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:25,839 INFO L225 Difference]: With dead ends: 365 [2023-12-02 14:01:25,840 INFO L226 Difference]: Without dead ends: 284 [2023-12-02 14:01:25,841 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 [2023-12-02 14:01:25,843 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 233 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:25,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 266 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:01:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-12-02 14:01:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 280. [2023-12-02 14:01:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 228 states have (on average 1.4210526315789473) internal successors, (324), 231 states have internal predecessors, (324), 36 states have call successors, (36), 15 states have call predecessors, (36), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 14:01:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 394 transitions. [2023-12-02 14:01:25,879 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 394 transitions. Word has length 29 [2023-12-02 14:01:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:25,880 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 394 transitions. [2023-12-02 14:01:25,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:01:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 394 transitions. [2023-12-02 14:01:25,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:01:25,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:25,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:01:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:01:25,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:25,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1698335353, now seen corresponding path program 1 times [2023-12-02 14:01:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:25,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212961881] [2023-12-02 14:01:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:25,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:01:25,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:25,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212961881] [2023-12-02 14:01:25,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212961881] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:01:25,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:01:25,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:01:25,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497697779] [2023-12-02 14:01:25,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:01:25,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:01:25,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:25,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:01:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:01:25,956 INFO L87 Difference]: Start difference. First operand 280 states and 394 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:01:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:26,097 INFO L93 Difference]: Finished difference Result 520 states and 722 transitions. [2023-12-02 14:01:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:01:26,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-02 14:01:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:26,102 INFO L225 Difference]: With dead ends: 520 [2023-12-02 14:01:26,102 INFO L226 Difference]: Without dead ends: 368 [2023-12-02 14:01:26,103 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 [2023-12-02 14:01:26,105 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 46 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:26,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 423 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:01:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-12-02 14:01:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 354. [2023-12-02 14:01:26,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 291 states have (on average 1.4054982817869415) internal successors, (409), 296 states have internal predecessors, (409), 42 states have call successors, (42), 20 states have call predecessors, (42), 19 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-02 14:01:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 491 transitions. [2023-12-02 14:01:26,141 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 491 transitions. Word has length 30 [2023-12-02 14:01:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:26,142 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 491 transitions. [2023-12-02 14:01:26,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:01:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 491 transitions. [2023-12-02 14:01:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 14:01:26,146 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:26,146 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] [2023-12-02 14:01:26,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:01:26,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:26,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:26,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1579971790, now seen corresponding path program 1 times [2023-12-02 14:01:26,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:26,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378083568] [2023-12-02 14:01:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:26,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:01:26,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:26,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378083568] [2023-12-02 14:01:26,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378083568] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:01:26,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:01:26,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:01:26,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62286547] [2023-12-02 14:01:26,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:01:26,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:01:26,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:26,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:01:26,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:01:26,239 INFO L87 Difference]: Start difference. First operand 354 states and 491 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:01:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:26,370 INFO L93 Difference]: Finished difference Result 517 states and 709 transitions. [2023-12-02 14:01:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:01:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-12-02 14:01:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:26,376 INFO L225 Difference]: With dead ends: 517 [2023-12-02 14:01:26,376 INFO L226 Difference]: Without dead ends: 359 [2023-12-02 14:01:26,377 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 [2023-12-02 14:01:26,378 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 32 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:26,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 457 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:01:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-12-02 14:01:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 348. [2023-12-02 14:01:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 285 states have (on average 1.3859649122807018) internal successors, (395), 290 states have internal predecessors, (395), 42 states have call successors, (42), 20 states have call predecessors, (42), 19 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-02 14:01:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 477 transitions. [2023-12-02 14:01:26,413 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 477 transitions. Word has length 43 [2023-12-02 14:01:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:26,414 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 477 transitions. [2023-12-02 14:01:26,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:01:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 477 transitions. [2023-12-02 14:01:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 14:01:26,417 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:26,417 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] [2023-12-02 14:01:26,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:01:26,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:26,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:26,418 INFO L85 PathProgramCache]: Analyzing trace with hash 556903927, now seen corresponding path program 1 times [2023-12-02 14:01:26,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:26,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524640830] [2023-12-02 14:01:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:26,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 14:01:26,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:26,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524640830] [2023-12-02 14:01:26,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524640830] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:01:26,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:01:26,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:01:26,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895225287] [2023-12-02 14:01:26,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:01:26,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:01:26,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:26,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:01:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:01:26,476 INFO L87 Difference]: Start difference. First operand 348 states and 477 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:01:26,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:26,605 INFO L93 Difference]: Finished difference Result 597 states and 801 transitions. [2023-12-02 14:01:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:01:26,606 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-12-02 14:01:26,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:26,610 INFO L225 Difference]: With dead ends: 597 [2023-12-02 14:01:26,610 INFO L226 Difference]: Without dead ends: 394 [2023-12-02 14:01:26,611 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 [2023-12-02 14:01:26,612 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 219 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:26,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 265 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:01:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-12-02 14:01:26,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2023-12-02 14:01:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 324 states have (on average 1.3518518518518519) internal successors, (438), 329 states have internal predecessors, (438), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-02 14:01:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 528 transitions. [2023-12-02 14:01:26,660 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 528 transitions. Word has length 46 [2023-12-02 14:01:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:26,661 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 528 transitions. [2023-12-02 14:01:26,661 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:01:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 528 transitions. [2023-12-02 14:01:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 14:01:26,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:26,663 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 14:01:26,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:01:26,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:26,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:26,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1909286166, now seen corresponding path program 1 times [2023-12-02 14:01:26,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:26,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387033155] [2023-12-02 14:01:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:26,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 14:01:26,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:26,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387033155] [2023-12-02 14:01:26,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387033155] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:01:26,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:01:26,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:01:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748498589] [2023-12-02 14:01:26,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:01:26,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:01:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:01:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:01:26,775 INFO L87 Difference]: Start difference. First operand 394 states and 528 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:01:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:27,062 INFO L93 Difference]: Finished difference Result 434 states and 575 transitions. [2023-12-02 14:01:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:01:27,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-12-02 14:01:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:27,068 INFO L225 Difference]: With dead ends: 434 [2023-12-02 14:01:27,068 INFO L226 Difference]: Without dead ends: 431 [2023-12-02 14:01:27,069 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 [2023-12-02 14:01:27,070 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 406 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:27,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 264 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:01:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-12-02 14:01:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 393. [2023-12-02 14:01:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 324 states have (on average 1.345679012345679) internal successors, (436), 328 states have internal predecessors, (436), 45 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-02 14:01:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 525 transitions. [2023-12-02 14:01:27,108 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 525 transitions. Word has length 47 [2023-12-02 14:01:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:27,108 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 525 transitions. [2023-12-02 14:01:27,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:01:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 525 transitions. [2023-12-02 14:01:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 14:01:27,110 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:27,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:01:27,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:01:27,111 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:27,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash -942630630, now seen corresponding path program 1 times [2023-12-02 14:01:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:27,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561484403] [2023-12-02 14:01:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:27,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 14:01:27,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:27,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561484403] [2023-12-02 14:01:27,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561484403] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:01:27,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540517141] [2023-12-02 14:01:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:27,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:01:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:01:27,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:01:27,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:01:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:27,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:01:27,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:01:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:01:27,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:01:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 14:01:27,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540517141] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:01:27,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544202298] [2023-12-02 14:01:27,833 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 14:01:27,834 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:01:27,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:01:27,843 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:01:27,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:01:32,903 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 129 for LOIs [2023-12-02 14:01:32,939 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 146 for LOIs [2023-12-02 14:01:32,995 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 192 for LOIs [2023-12-02 14:01:36,354 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:01:57,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6579#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (not (= ~p_num_write~0 1)) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| 2147483647) (<= 0 (+ 2147483648 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)) (not (= 0 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)))) (= 0 ~t2_pc~0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (= ~t1_i~0 0))' at error location [2023-12-02 14:01:57,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:01:57,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:01:57,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 14:01:57,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386234904] [2023-12-02 14:01:57,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:01:57,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:01:57,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:57,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:01:57,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 14:01:57,562 INFO L87 Difference]: Start difference. First operand 393 states and 525 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 14:01:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:57,906 INFO L93 Difference]: Finished difference Result 836 states and 1093 transitions. [2023-12-02 14:01:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:01:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2023-12-02 14:01:57,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:57,913 INFO L225 Difference]: With dead ends: 836 [2023-12-02 14:01:57,913 INFO L226 Difference]: Without dead ends: 833 [2023-12-02 14:01:57,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 14:01:57,915 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 368 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:57,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 830 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:01:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2023-12-02 14:01:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 602. [2023-12-02 14:01:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 501 states have (on average 1.3353293413173652) internal successors, (669), 507 states have internal predecessors, (669), 64 states have call successors, (64), 36 states have call predecessors, (64), 35 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2023-12-02 14:01:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 796 transitions. [2023-12-02 14:01:57,955 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 796 transitions. Word has length 48 [2023-12-02 14:01:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:57,956 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 796 transitions. [2023-12-02 14:01:57,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 14:01:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 796 transitions. [2023-12-02 14:01:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 14:01:57,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:57,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:01:57,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:01:58,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 14:01:58,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:58,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:58,161 INFO L85 PathProgramCache]: Analyzing trace with hash 839013632, now seen corresponding path program 1 times [2023-12-02 14:01:58,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:58,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674927174] [2023-12-02 14:01:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:58,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:01:58,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:58,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674927174] [2023-12-02 14:01:58,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674927174] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:01:58,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:01:58,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:01:58,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334737938] [2023-12-02 14:01:58,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:01:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:01:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:01:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:01:58,255 INFO L87 Difference]: Start difference. First operand 602 states and 796 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-12-02 14:01:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:58,972 INFO L93 Difference]: Finished difference Result 1185 states and 1708 transitions. [2023-12-02 14:01:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:01:58,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 49 [2023-12-02 14:01:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:58,981 INFO L225 Difference]: With dead ends: 1185 [2023-12-02 14:01:58,981 INFO L226 Difference]: Without dead ends: 1063 [2023-12-02 14:01:58,983 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 [2023-12-02 14:01:58,984 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 909 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:58,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 859 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:01:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2023-12-02 14:01:59,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1052. [2023-12-02 14:01:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 866 states have (on average 1.379907621247113) internal successors, (1195), 875 states have internal predecessors, (1195), 125 states have call successors, (125), 60 states have call predecessors, (125), 59 states have return successors, (162), 117 states have call predecessors, (162), 124 states have call successors, (162) [2023-12-02 14:01:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1482 transitions. [2023-12-02 14:01:59,089 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1482 transitions. Word has length 49 [2023-12-02 14:01:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:59,090 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 1482 transitions. [2023-12-02 14:01:59,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-12-02 14:01:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1482 transitions. [2023-12-02 14:01:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 14:01:59,093 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:59,093 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-12-02 14:01:59,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 14:01:59,093 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:59,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1885874944, now seen corresponding path program 2 times [2023-12-02 14:01:59,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:59,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965756459] [2023-12-02 14:01:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:59,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 14:01:59,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:59,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965756459] [2023-12-02 14:01:59,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965756459] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:01:59,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:01:59,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:01:59,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184059468] [2023-12-02 14:01:59,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:01:59,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:01:59,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:01:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:01:59,146 INFO L87 Difference]: Start difference. First operand 1052 states and 1482 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 14:01:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:59,290 INFO L93 Difference]: Finished difference Result 1382 states and 1915 transitions. [2023-12-02 14:01:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:01:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2023-12-02 14:01:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:59,297 INFO L225 Difference]: With dead ends: 1382 [2023-12-02 14:01:59,298 INFO L226 Difference]: Without dead ends: 994 [2023-12-02 14:01:59,299 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 [2023-12-02 14:01:59,300 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 232 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:59,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 281 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:01:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2023-12-02 14:01:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 985. [2023-12-02 14:01:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 809 states have (on average 1.377008652657602) internal successors, (1114), 819 states have internal predecessors, (1114), 119 states have call successors, (119), 56 states have call predecessors, (119), 55 states have return successors, (156), 110 states have call predecessors, (156), 118 states have call successors, (156) [2023-12-02 14:01:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1389 transitions. [2023-12-02 14:01:59,404 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1389 transitions. Word has length 61 [2023-12-02 14:01:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:59,405 INFO L495 AbstractCegarLoop]: Abstraction has 985 states and 1389 transitions. [2023-12-02 14:01:59,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 14:01:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1389 transitions. [2023-12-02 14:01:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 14:01:59,408 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:59,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:01:59,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 14:01:59,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:01:59,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:01:59,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2068011254, now seen corresponding path program 1 times [2023-12-02 14:01:59,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:01:59,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315965617] [2023-12-02 14:01:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:59,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:01:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 14:01:59,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:01:59,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315965617] [2023-12-02 14:01:59,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315965617] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:01:59,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40760759] [2023-12-02 14:01:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:01:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:01:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:01:59,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:01:59,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:01:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:01:59,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:01:59,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:01:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 14:01:59,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:01:59,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40760759] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:01:59,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:01:59,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 14:01:59,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520175788] [2023-12-02 14:01:59,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:01:59,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:01:59,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:01:59,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:01:59,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:01:59,762 INFO L87 Difference]: Start difference. First operand 985 states and 1389 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:01:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:01:59,907 INFO L93 Difference]: Finished difference Result 1112 states and 1548 transitions. [2023-12-02 14:01:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:01:59,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2023-12-02 14:01:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:01:59,913 INFO L225 Difference]: With dead ends: 1112 [2023-12-02 14:01:59,913 INFO L226 Difference]: Without dead ends: 578 [2023-12-02 14:01:59,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:01:59,916 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 25 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:01:59,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 428 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:01:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-12-02 14:01:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2023-12-02 14:01:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 466 states have (on average 1.44206008583691) internal successors, (672), 470 states have internal predecessors, (672), 81 states have call successors, (81), 30 states have call predecessors, (81), 30 states have return successors, (119), 78 states have call predecessors, (119), 81 states have call successors, (119) [2023-12-02 14:01:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 872 transitions. [2023-12-02 14:01:59,976 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 872 transitions. Word has length 73 [2023-12-02 14:01:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:01:59,976 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 872 transitions. [2023-12-02 14:01:59,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:01:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 872 transitions. [2023-12-02 14:01:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 14:01:59,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:01:59,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:01:59,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:02:00,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 14:02:00,180 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:00,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:00,181 INFO L85 PathProgramCache]: Analyzing trace with hash -62361410, now seen corresponding path program 1 times [2023-12-02 14:02:00,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:00,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361048366] [2023-12-02 14:02:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:00,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:02:00,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:00,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361048366] [2023-12-02 14:02:00,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361048366] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:00,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782397435] [2023-12-02 14:02:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:00,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:00,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:00,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:02:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:00,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:00,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 14:02:00,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:00,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782397435] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:00,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:00,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:02:00,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585448119] [2023-12-02 14:02:00,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:00,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:00,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:00,529 INFO L87 Difference]: Start difference. First operand 578 states and 872 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:02:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:00,697 INFO L93 Difference]: Finished difference Result 1706 states and 2644 transitions. [2023-12-02 14:02:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:00,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-12-02 14:02:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:00,706 INFO L225 Difference]: With dead ends: 1706 [2023-12-02 14:02:00,706 INFO L226 Difference]: Without dead ends: 1134 [2023-12-02 14:02:00,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:00,711 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 161 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:00,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 317 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2023-12-02 14:02:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1127. [2023-12-02 14:02:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 913 states have (on average 1.434830230010953) internal successors, (1310), 920 states have internal predecessors, (1310), 153 states have call successors, (153), 60 states have call predecessors, (153), 60 states have return successors, (225), 147 states have call predecessors, (225), 153 states have call successors, (225) [2023-12-02 14:02:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1688 transitions. [2023-12-02 14:02:00,784 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1688 transitions. Word has length 95 [2023-12-02 14:02:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:00,784 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 1688 transitions. [2023-12-02 14:02:00,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:02:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1688 transitions. [2023-12-02 14:02:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 14:02:00,789 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:00,789 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:00,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 14:02:00,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:00,992 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:00,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1998524830, now seen corresponding path program 1 times [2023-12-02 14:02:00,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:00,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935736364] [2023-12-02 14:02:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:00,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:02:01,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:01,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935736364] [2023-12-02 14:02:01,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935736364] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157858497] [2023-12-02 14:02:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:01,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:01,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:01,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:01,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:02:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:01,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:01,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 14:02:01,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157858497] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:01,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:02:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855716056] [2023-12-02 14:02:01,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:01,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:01,367 INFO L87 Difference]: Start difference. First operand 1127 states and 1688 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:02:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:01,627 INFO L93 Difference]: Finished difference Result 3338 states and 5130 transitions. [2023-12-02 14:02:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:01,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-12-02 14:02:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:01,643 INFO L225 Difference]: With dead ends: 3338 [2023-12-02 14:02:01,643 INFO L226 Difference]: Without dead ends: 2217 [2023-12-02 14:02:01,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:01,649 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 149 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:01,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 300 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2023-12-02 14:02:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2205. [2023-12-02 14:02:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 1792 states have (on average 1.4263392857142858) internal successors, (2556), 1805 states have internal predecessors, (2556), 292 states have call successors, (292), 120 states have call predecessors, (292), 120 states have return successors, (428), 280 states have call predecessors, (428), 292 states have call successors, (428) [2023-12-02 14:02:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 3276 transitions. [2023-12-02 14:02:01,812 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 3276 transitions. Word has length 95 [2023-12-02 14:02:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:01,812 INFO L495 AbstractCegarLoop]: Abstraction has 2205 states and 3276 transitions. [2023-12-02 14:02:01,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:02:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 3276 transitions. [2023-12-02 14:02:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 14:02:01,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:01,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:01,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 14:02:02,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:02,017 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:02,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash -851967362, now seen corresponding path program 1 times [2023-12-02 14:02:02,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:02,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241201344] [2023-12-02 14:02:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:02,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:02:02,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241201344] [2023-12-02 14:02:02,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241201344] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927120939] [2023-12-02 14:02:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:02,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:02,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:02,128 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:02,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:02:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:02,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:02,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 14:02:02,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:02,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927120939] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:02,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:02,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:02:02,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67883512] [2023-12-02 14:02:02,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:02,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:02,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:02,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:02,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:02,342 INFO L87 Difference]: Start difference. First operand 2205 states and 3276 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:02:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:02,675 INFO L93 Difference]: Finished difference Result 6542 states and 9961 transitions. [2023-12-02 14:02:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-12-02 14:02:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:02,703 INFO L225 Difference]: With dead ends: 6542 [2023-12-02 14:02:02,703 INFO L226 Difference]: Without dead ends: 4343 [2023-12-02 14:02:02,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:02,713 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 155 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:02,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 295 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2023-12-02 14:02:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 4321. [2023-12-02 14:02:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4321 states, 3520 states have (on average 1.4170454545454545) internal successors, (4988), 3545 states have internal predecessors, (4988), 560 states have call successors, (560), 240 states have call predecessors, (560), 240 states have return successors, (816), 536 states have call predecessors, (816), 560 states have call successors, (816) [2023-12-02 14:02:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 6364 transitions. [2023-12-02 14:02:03,000 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 6364 transitions. Word has length 95 [2023-12-02 14:02:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:03,001 INFO L495 AbstractCegarLoop]: Abstraction has 4321 states and 6364 transitions. [2023-12-02 14:02:03,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:02:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 6364 transitions. [2023-12-02 14:02:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 14:02:03,007 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:03,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:03,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 14:02:03,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:03,208 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:03,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:03,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1381026654, now seen corresponding path program 1 times [2023-12-02 14:02:03,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:03,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409057046] [2023-12-02 14:02:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:03,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 14:02:03,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:03,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409057046] [2023-12-02 14:02:03,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409057046] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:03,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:03,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:02:03,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662060711] [2023-12-02 14:02:03,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:03,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:03,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:03,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:03,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:02:03,296 INFO L87 Difference]: Start difference. First operand 4321 states and 6364 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:02:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:03,646 INFO L93 Difference]: Finished difference Result 8819 states and 13257 transitions. [2023-12-02 14:02:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:03,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-12-02 14:02:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:03,677 INFO L225 Difference]: With dead ends: 8819 [2023-12-02 14:02:03,677 INFO L226 Difference]: Without dead ends: 5361 [2023-12-02 14:02:03,688 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 [2023-12-02 14:02:03,688 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 80 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:03,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 394 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2023-12-02 14:02:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4993. [2023-12-02 14:02:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4993 states, 4160 states have (on average 1.4432692307692307) internal successors, (6004), 4185 states have internal predecessors, (6004), 576 states have call successors, (576), 256 states have call predecessors, (576), 256 states have return successors, (832), 552 states have call predecessors, (832), 576 states have call successors, (832) [2023-12-02 14:02:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4993 states to 4993 states and 7412 transitions. [2023-12-02 14:02:04,031 INFO L78 Accepts]: Start accepts. Automaton has 4993 states and 7412 transitions. Word has length 95 [2023-12-02 14:02:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:04,031 INFO L495 AbstractCegarLoop]: Abstraction has 4993 states and 7412 transitions. [2023-12-02 14:02:04,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:02:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4993 states and 7412 transitions. [2023-12-02 14:02:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 14:02:04,047 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:04,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:04,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 14:02:04,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:04,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash 521999916, now seen corresponding path program 1 times [2023-12-02 14:02:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:04,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291094368] [2023-12-02 14:02:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:04,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 14:02:04,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:04,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291094368] [2023-12-02 14:02:04,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291094368] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:04,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:04,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:02:04,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761069470] [2023-12-02 14:02:04,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:04,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:04,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:02:04,122 INFO L87 Difference]: Start difference. First operand 4993 states and 7412 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:02:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:04,717 INFO L93 Difference]: Finished difference Result 14790 states and 22373 transitions. [2023-12-02 14:02:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2023-12-02 14:02:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:04,787 INFO L225 Difference]: With dead ends: 14790 [2023-12-02 14:02:04,788 INFO L226 Difference]: Without dead ends: 9803 [2023-12-02 14:02:04,808 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 [2023-12-02 14:02:04,809 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 150 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:04,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 297 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2023-12-02 14:02:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 9745. [2023-12-02 14:02:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9745 states, 8124 states have (on average 1.430329886755293) internal successors, (11620), 8173 states have internal predecessors, (11620), 1108 states have call successors, (1108), 512 states have call predecessors, (1108), 512 states have return successors, (1588), 1060 states have call predecessors, (1588), 1108 states have call successors, (1588) [2023-12-02 14:02:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9745 states to 9745 states and 14316 transitions. [2023-12-02 14:02:05,764 INFO L78 Accepts]: Start accepts. Automaton has 9745 states and 14316 transitions. Word has length 128 [2023-12-02 14:02:05,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:05,764 INFO L495 AbstractCegarLoop]: Abstraction has 9745 states and 14316 transitions. [2023-12-02 14:02:05,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:02:05,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9745 states and 14316 transitions. [2023-12-02 14:02:05,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 14:02:05,803 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:05,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:05,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 14:02:05,803 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:05,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:05,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1022204340, now seen corresponding path program 1 times [2023-12-02 14:02:05,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:05,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104207898] [2023-12-02 14:02:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 14:02:05,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:05,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104207898] [2023-12-02 14:02:05,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104207898] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:05,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:05,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:02:05,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589370759] [2023-12-02 14:02:05,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:05,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:05,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:05,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:05,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:02:05,899 INFO L87 Difference]: Start difference. First operand 9745 states and 14316 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:02:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:07,070 INFO L93 Difference]: Finished difference Result 28870 states and 43169 transitions. [2023-12-02 14:02:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2023-12-02 14:02:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:07,131 INFO L225 Difference]: With dead ends: 28870 [2023-12-02 14:02:07,131 INFO L226 Difference]: Without dead ends: 19131 [2023-12-02 14:02:07,164 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 [2023-12-02 14:02:07,164 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 152 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:07,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 311 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19131 states. [2023-12-02 14:02:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19131 to 19017. [2023-12-02 14:02:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19017 states, 15860 states have (on average 1.4166456494325346) internal successors, (22468), 15957 states have internal predecessors, (22468), 2132 states have call successors, (2132), 1024 states have call predecessors, (2132), 1024 states have return successors, (3028), 2036 states have call predecessors, (3028), 2132 states have call successors, (3028) [2023-12-02 14:02:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19017 states to 19017 states and 27628 transitions. [2023-12-02 14:02:08,364 INFO L78 Accepts]: Start accepts. Automaton has 19017 states and 27628 transitions. Word has length 128 [2023-12-02 14:02:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:08,365 INFO L495 AbstractCegarLoop]: Abstraction has 19017 states and 27628 transitions. [2023-12-02 14:02:08,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:02:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 19017 states and 27628 transitions. [2023-12-02 14:02:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 14:02:08,448 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:08,448 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:08,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 14:02:08,449 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:08,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1037510716, now seen corresponding path program 1 times [2023-12-02 14:02:08,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:08,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569142019] [2023-12-02 14:02:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:08,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 14:02:09,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569142019] [2023-12-02 14:02:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569142019] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783452637] [2023-12-02 14:02:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:09,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:09,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:09,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:09,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:02:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:09,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 14:02:09,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 70 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 14:02:09,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:02:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 14:02:09,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783452637] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:02:09,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404888973] [2023-12-02 14:02:09,960 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2023-12-02 14:02:09,961 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:02:09,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:02:09,962 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:02:09,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:02:25,289 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 166 for LOIs [2023-12-02 14:02:25,458 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-12-02 14:02:25,478 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2023-12-02 14:02:25,479 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 52 for LOIs [2023-12-02 14:02:25,579 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2023-12-02 14:02:25,736 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 180 for LOIs [2023-12-02 14:02:25,905 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:02:35,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '148164#(and (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (<= 0 |ULTIMATE.start_eval2_~tmp~4#1|) (= ~m_pc~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (<= |ULTIMATE.start_eval2_~tmp~4#1| 1) (not (= |ULTIMATE.start_eval2_~tmp~4#1| 0)) (= ~m_st~0 1) (not (= ~token~0 (+ 6 ~local~0))) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 14:02:35,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:02:35,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:02:35,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-12-02 14:02:35,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129306238] [2023-12-02 14:02:35,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:02:35,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:02:35,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:35,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:02:35,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=4848, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 14:02:35,312 INFO L87 Difference]: Start difference. First operand 19017 states and 27628 transitions. Second operand has 13 states, 13 states have (on average 15.23076923076923) internal successors, (198), 13 states have internal predecessors, (198), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 14:02:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:39,279 INFO L93 Difference]: Finished difference Result 67561 states and 99968 transitions. [2023-12-02 14:02:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 14:02:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.23076923076923) internal successors, (198), 13 states have internal predecessors, (198), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 148 [2023-12-02 14:02:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:39,455 INFO L225 Difference]: With dead ends: 67561 [2023-12-02 14:02:39,455 INFO L226 Difference]: Without dead ends: 48551 [2023-12-02 14:02:39,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 392 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=790, Invalid=8522, Unknown=0, NotChecked=0, Total=9312 [2023-12-02 14:02:39,495 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1919 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:39,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1919 Valid, 1102 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:02:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48551 states. [2023-12-02 14:02:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48551 to 43889. [2023-12-02 14:02:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43889 states, 36460 states have (on average 1.3916620954470653) internal successors, (50740), 36701 states have internal predecessors, (50740), 4980 states have call successors, (4980), 2448 states have call predecessors, (4980), 2448 states have return successors, (7204), 4740 states have call predecessors, (7204), 4980 states have call successors, (7204) [2023-12-02 14:02:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43889 states to 43889 states and 62924 transitions. [2023-12-02 14:02:42,964 INFO L78 Accepts]: Start accepts. Automaton has 43889 states and 62924 transitions. Word has length 148 [2023-12-02 14:02:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:42,964 INFO L495 AbstractCegarLoop]: Abstraction has 43889 states and 62924 transitions. [2023-12-02 14:02:42,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.23076923076923) internal successors, (198), 13 states have internal predecessors, (198), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 14:02:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 43889 states and 62924 transitions. [2023-12-02 14:02:43,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 14:02:43,037 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:43,037 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:43,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:02:43,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 14:02:43,238 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:43,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:43,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2106648547, now seen corresponding path program 1 times [2023-12-02 14:02:43,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:43,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489828247] [2023-12-02 14:02:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:43,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 14:02:43,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:43,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489828247] [2023-12-02 14:02:43,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489828247] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:43,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104485009] [2023-12-02 14:02:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:43,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:43,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:43,344 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:43,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:02:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:43,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:43,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 14:02:43,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:43,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104485009] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:43,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:43,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 14:02:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016485080] [2023-12-02 14:02:43,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:43,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:43,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:43,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:43,630 INFO L87 Difference]: Start difference. First operand 43889 states and 62924 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:02:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:46,836 INFO L93 Difference]: Finished difference Result 87555 states and 126101 transitions. [2023-12-02 14:02:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:46,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 153 [2023-12-02 14:02:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:47,035 INFO L225 Difference]: With dead ends: 87555 [2023-12-02 14:02:47,035 INFO L226 Difference]: Without dead ends: 55201 [2023-12-02 14:02:47,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:47,148 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 142 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:47,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 214 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55201 states. [2023-12-02 14:02:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55201 to 53633. [2023-12-02 14:02:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53633 states, 45266 states have (on average 1.366721159369063) internal successors, (61866), 45459 states have internal predecessors, (61866), 5256 states have call successors, (5256), 3108 states have call predecessors, (5256), 3110 states have return successors, (7614), 5066 states have call predecessors, (7614), 5256 states have call successors, (7614) [2023-12-02 14:02:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53633 states to 53633 states and 74736 transitions. [2023-12-02 14:02:51,295 INFO L78 Accepts]: Start accepts. Automaton has 53633 states and 74736 transitions. Word has length 153 [2023-12-02 14:02:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:51,298 INFO L495 AbstractCegarLoop]: Abstraction has 53633 states and 74736 transitions. [2023-12-02 14:02:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:02:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 53633 states and 74736 transitions. [2023-12-02 14:02:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 14:02:51,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:51,378 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:51,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:02:51,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 14:02:51,580 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:51,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash 341831938, now seen corresponding path program 1 times [2023-12-02 14:02:51,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:51,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617896134] [2023-12-02 14:02:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:51,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 14:02:51,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:51,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617896134] [2023-12-02 14:02:51,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617896134] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:51,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645578788] [2023-12-02 14:02:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:51,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:51,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 14:02:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:51,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:51,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 14:02:51,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:51,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645578788] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:51,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:51,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 14:02:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157380168] [2023-12-02 14:02:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:51,942 INFO L87 Difference]: Start difference. First operand 53633 states and 74736 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:02:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:56,381 INFO L93 Difference]: Finished difference Result 102657 states and 144824 transitions. [2023-12-02 14:02:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 153 [2023-12-02 14:02:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:56,600 INFO L225 Difference]: With dead ends: 102657 [2023-12-02 14:02:56,600 INFO L226 Difference]: Without dead ends: 75323 [2023-12-02 14:02:56,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:56,657 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 115 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:56,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 428 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75323 states. [2023-12-02 14:03:01,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75323 to 62705. [2023-12-02 14:03:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62705 states, 53810 states have (on average 1.3875859505668091) internal successors, (74666), 54003 states have internal predecessors, (74666), 5520 states have call successors, (5520), 3372 states have call predecessors, (5520), 3374 states have return successors, (7878), 5330 states have call predecessors, (7878), 5520 states have call successors, (7878) [2023-12-02 14:03:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62705 states to 62705 states and 88064 transitions. [2023-12-02 14:03:01,554 INFO L78 Accepts]: Start accepts. Automaton has 62705 states and 88064 transitions. Word has length 153 [2023-12-02 14:03:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:03:01,554 INFO L495 AbstractCegarLoop]: Abstraction has 62705 states and 88064 transitions. [2023-12-02 14:03:01,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:03:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 62705 states and 88064 transitions. [2023-12-02 14:03:01,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 14:03:01,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:03:01,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:03:01,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 14:03:01,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:03:01,878 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:03:01,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:03:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1798567258, now seen corresponding path program 2 times [2023-12-02 14:03:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:03:01,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565702119] [2023-12-02 14:03:01,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:03:01,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:03:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:03:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 14:03:02,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:03:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565702119] [2023-12-02 14:03:02,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565702119] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:03:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091007896] [2023-12-02 14:03:02,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:03:02,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:03:02,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:03:02,195 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:03:02,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 14:03:02,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 14:03:02,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:03:02,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:03:02,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:03:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 14:03:02,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:03:02,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091007896] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:03:02,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:03:02,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 14:03:02,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59205734] [2023-12-02 14:03:02,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:03:02,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:03:02,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:03:02,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:03:02,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:03:02,444 INFO L87 Difference]: Start difference. First operand 62705 states and 88064 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 14:03:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:03:07,207 INFO L93 Difference]: Finished difference Result 111002 states and 155813 transitions. [2023-12-02 14:03:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:03:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 153 [2023-12-02 14:03:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:03:07,368 INFO L225 Difference]: With dead ends: 111002 [2023-12-02 14:03:07,368 INFO L226 Difference]: Without dead ends: 65164 [2023-12-02 14:03:07,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:03:07,428 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 145 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:03:07,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 600 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:03:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65164 states. [2023-12-02 14:03:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65164 to 64836. [2023-12-02 14:03:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64836 states, 55736 states have (on average 1.3834146691545859) internal successors, (77106), 56025 states have internal predecessors, (77106), 5528 states have call successors, (5528), 3377 states have call predecessors, (5528), 3571 states have return successors, (8174), 5434 states have call predecessors, (8174), 5528 states have call successors, (8174) [2023-12-02 14:03:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64836 states to 64836 states and 90808 transitions. [2023-12-02 14:03:12,156 INFO L78 Accepts]: Start accepts. Automaton has 64836 states and 90808 transitions. Word has length 153 [2023-12-02 14:03:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:03:12,156 INFO L495 AbstractCegarLoop]: Abstraction has 64836 states and 90808 transitions. [2023-12-02 14:03:12,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 14:03:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 64836 states and 90808 transitions. [2023-12-02 14:03:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 14:03:12,244 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:03:12,245 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:03:12,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 14:03:12,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-12-02 14:03:12,445 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:03:12,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:03:12,446 INFO L85 PathProgramCache]: Analyzing trace with hash 654086247, now seen corresponding path program 2 times [2023-12-02 14:03:12,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:03:12,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086136441] [2023-12-02 14:03:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:03:12,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:03:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:03:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 14:03:12,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:03:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086136441] [2023-12-02 14:03:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086136441] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:03:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597051340] [2023-12-02 14:03:12,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:03:12,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:03:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:03:12,866 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:03:12,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ba52f1-85ce-45ba-a9bc-53d16005decc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 14:03:13,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:03:13,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:03:13,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 14:03:13,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:03:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 14:03:13,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:03:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 14:03:13,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597051340] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:03:13,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701484215] [2023-12-02 14:03:13,632 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2023-12-02 14:03:13,632 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:03:13,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:03:13,633 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:03:13,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:03:43,675 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 183 for LOIs [2023-12-02 14:03:43,894 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-12-02 14:03:44,404 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32768 conjunctions. This might take some time... [2023-12-02 14:09:27,288 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 32768 conjunctions. [2023-12-02 14:09:28,850 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-12-02 14:09:29,228 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32768 conjunctions. This might take some time... [2023-12-02 14:15:02,545 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 32768 conjunctions.