./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.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_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/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_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/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_a066d383-69fa-4a49-86d9-a191bae9662d/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 82bdcd0599c1cc352b3450b4e917b8a69eeb254589d3b948d4951dae1b33e3d4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:26:09,316 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:26:09,381 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:26:09,385 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:26:09,386 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:26:09,409 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:26:09,410 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:26:09,411 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:26:09,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:26:09,412 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:26:09,412 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:26:09,413 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:26:09,413 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:26:09,414 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:26:09,414 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:26:09,415 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:26:09,415 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:26:09,416 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:26:09,416 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:26:09,417 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:26:09,417 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:26:09,417 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:26:09,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:26:09,418 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:26:09,419 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:26:09,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:26:09,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:26:09,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:26:09,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:26:09,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:26:09,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:26:09,421 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:26:09,421 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:26:09,421 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:26:09,422 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:26:09,422 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:26:09,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:26:09,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:26:09,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:26:09,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:26:09,423 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:26:09,423 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:26:09,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:26:09,424 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:26:09,424 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:26:09,424 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:26:09,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:26:09,424 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_a066d383-69fa-4a49-86d9-a191bae9662d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82bdcd0599c1cc352b3450b4e917b8a69eeb254589d3b948d4951dae1b33e3d4 [2023-12-02 17:26:09,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:26:09,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:26:09,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:26:09,680 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:26:09,680 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:26:09,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c [2023-12-02 17:26:12,450 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:26:12,642 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:26:12,642 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c [2023-12-02 17:26:12,657 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/data/588a95560/7b62429f286740a7b71285e711f77af7/FLAG929158078 [2023-12-02 17:26:12,671 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/data/588a95560/7b62429f286740a7b71285e711f77af7 [2023-12-02 17:26:12,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:26:12,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:26:12,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:26:12,675 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:26:12,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:26:12,680 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:26:12" (1/1) ... [2023-12-02 17:26:12,681 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee45241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:12, skipping insertion in model container [2023-12-02 17:26:12,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:26:12" (1/1) ... [2023-12-02 17:26:12,732 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:26:12,857 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_a066d383-69fa-4a49-86d9-a191bae9662d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c[913,926] [2023-12-02 17:26:12,899 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_a066d383-69fa-4a49-86d9-a191bae9662d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c[5977,5990] [2023-12-02 17:26:12,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:26:12,965 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:26:12,976 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_a066d383-69fa-4a49-86d9-a191bae9662d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c[913,926] [2023-12-02 17:26:12,992 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_a066d383-69fa-4a49-86d9-a191bae9662d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c[5977,5990] [2023-12-02 17:26:13,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:26:13,038 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:26:13,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13 WrapperNode [2023-12-02 17:26:13,039 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:26:13,040 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:26:13,040 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:26:13,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:26:13,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,100 INFO L138 Inliner]: procedures = 56, calls = 60, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 605 [2023-12-02 17:26:13,100 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:26:13,101 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:26:13,101 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:26:13,101 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:26:13,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,112 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,124 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,135 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,141 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:26:13,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:26:13,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:26:13,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:26:13,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (1/1) ... [2023-12-02 17:26:13,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:26:13,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:13,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:26:13,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:26:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:26:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 17:26:13,209 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 17:26:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-12-02 17:26:13,209 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-12-02 17:26:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 17:26:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 17:26:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 17:26:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 17:26:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 17:26:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 17:26:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 17:26:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 17:26:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 17:26:13,211 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 17:26:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:26:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 17:26:13,211 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 17:26:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:26:13,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:26:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 17:26:13,212 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 17:26:13,309 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:26:13,311 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:26:13,844 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:26:14,103 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:26:14,103 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-02 17:26:14,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:26:14 BoogieIcfgContainer [2023-12-02 17:26:14,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:26:14,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:26:14,107 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:26:14,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:26:14,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:26:12" (1/3) ... [2023-12-02 17:26:14,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a6b148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:26:14, skipping insertion in model container [2023-12-02 17:26:14,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:13" (2/3) ... [2023-12-02 17:26:14,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a6b148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:26:14, skipping insertion in model container [2023-12-02 17:26:14,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:26:14" (3/3) ... [2023-12-02 17:26:14,112 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.04.cil-1.c [2023-12-02 17:26:14,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:26:14,131 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 17:26:14,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:26:14,189 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;@208a6632, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:26:14,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 17:26:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 125 states have internal predecessors, (182), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 17:26:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:26:14,201 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:14,201 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 17:26:14,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:14,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1036339024, now seen corresponding path program 1 times [2023-12-02 17:26:14,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:14,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149769768] [2023-12-02 17:26:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:14,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:14,485 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 17:26:14,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149769768] [2023-12-02 17:26:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149769768] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:14,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:14,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:14,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492313018] [2023-12-02 17:26:14,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:14,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:14,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:14,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:14,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:14,526 INFO L87 Difference]: Start difference. First operand has 156 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 125 states have internal predecessors, (182), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) 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 17:26:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:14,673 INFO L93 Difference]: Finished difference Result 345 states and 508 transitions. [2023-12-02 17:26:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:14,675 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 17:26:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:14,686 INFO L225 Difference]: With dead ends: 345 [2023-12-02 17:26:14,686 INFO L226 Difference]: Without dead ends: 189 [2023-12-02 17:26:14,690 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 17:26:14,694 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 197 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:14,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 250 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-02 17:26:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2023-12-02 17:26:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 146 states have (on average 1.4315068493150684) internal successors, (209), 149 states have internal predecessors, (209), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 17:26:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 261 transitions. [2023-12-02 17:26:14,755 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 261 transitions. Word has length 28 [2023-12-02 17:26:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:14,755 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 261 transitions. [2023-12-02 17:26:14,756 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 17:26:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 261 transitions. [2023-12-02 17:26:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 17:26:14,758 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:14,758 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 17:26:14,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:26:14,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:14,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash -286610587, now seen corresponding path program 1 times [2023-12-02 17:26:14,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:14,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285536583] [2023-12-02 17:26:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:14,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:14,821 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 17:26:14,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:14,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285536583] [2023-12-02 17:26:14,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285536583] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:14,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:14,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:14,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043971950] [2023-12-02 17:26:14,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:14,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:14,825 INFO L87 Difference]: Start difference. First operand 185 states and 261 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 17:26:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:14,914 INFO L93 Difference]: Finished difference Result 341 states and 478 transitions. [2023-12-02 17:26:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:14,915 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 17:26:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:14,917 INFO L225 Difference]: With dead ends: 341 [2023-12-02 17:26:14,918 INFO L226 Difference]: Without dead ends: 260 [2023-12-02 17:26:14,919 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 17:26:14,920 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 195 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:14,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 234 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-12-02 17:26:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2023-12-02 17:26:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 206 states have (on average 1.4077669902912622) internal successors, (290), 209 states have internal predecessors, (290), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 17:26:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 356 transitions. [2023-12-02 17:26:14,951 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 356 transitions. Word has length 29 [2023-12-02 17:26:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:14,952 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 356 transitions. [2023-12-02 17:26:14,952 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 17:26:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 356 transitions. [2023-12-02 17:26:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 17:26:14,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:14,955 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 17:26:14,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:26:14,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:14,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash 297153354, now seen corresponding path program 1 times [2023-12-02 17:26:14,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:14,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048071376] [2023-12-02 17:26:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:14,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:15,006 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 17:26:15,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:15,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048071376] [2023-12-02 17:26:15,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048071376] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:15,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:15,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:15,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374576763] [2023-12-02 17:26:15,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:15,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:15,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:15,010 INFO L87 Difference]: Start difference. First operand 256 states and 356 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 17:26:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:15,113 INFO L93 Difference]: Finished difference Result 496 states and 684 transitions. [2023-12-02 17:26:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:15,114 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 17:26:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:15,117 INFO L225 Difference]: With dead ends: 496 [2023-12-02 17:26:15,117 INFO L226 Difference]: Without dead ends: 344 [2023-12-02 17:26:15,118 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 17:26:15,120 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 46 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:15,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 359 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:15,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-12-02 17:26:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 330. [2023-12-02 17:26:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 269 states have (on average 1.3940520446096654) internal successors, (375), 274 states have internal predecessors, (375), 40 states have call successors, (40), 20 states have call predecessors, (40), 19 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2023-12-02 17:26:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 453 transitions. [2023-12-02 17:26:15,149 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 453 transitions. Word has length 30 [2023-12-02 17:26:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:15,150 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 453 transitions. [2023-12-02 17:26:15,150 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 17:26:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 453 transitions. [2023-12-02 17:26:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 17:26:15,154 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:15,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:26:15,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:26:15,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:15,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:15,155 INFO L85 PathProgramCache]: Analyzing trace with hash 360808027, now seen corresponding path program 1 times [2023-12-02 17:26:15,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:15,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852501261] [2023-12-02 17:26:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:15,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:15,287 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 17:26:15,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:15,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852501261] [2023-12-02 17:26:15,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852501261] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:15,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:15,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:26:15,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536699821] [2023-12-02 17:26:15,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:15,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:26:15,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:26:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:26:15,290 INFO L87 Difference]: Start difference. First operand 330 states and 453 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:26:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:15,567 INFO L93 Difference]: Finished difference Result 519 states and 738 transitions. [2023-12-02 17:26:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:26:15,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-12-02 17:26:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:15,572 INFO L225 Difference]: With dead ends: 519 [2023-12-02 17:26:15,572 INFO L226 Difference]: Without dead ends: 421 [2023-12-02 17:26:15,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:26:15,575 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 316 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:15,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 486 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:26:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-12-02 17:26:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 420. [2023-12-02 17:26:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 339 states have (on average 1.3864306784660767) internal successors, (470), 345 states have internal predecessors, (470), 54 states have call successors, (54), 26 states have call predecessors, (54), 25 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2023-12-02 17:26:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 576 transitions. [2023-12-02 17:26:15,611 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 576 transitions. Word has length 43 [2023-12-02 17:26:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:15,612 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 576 transitions. [2023-12-02 17:26:15,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:26:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 576 transitions. [2023-12-02 17:26:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 17:26:15,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:15,615 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 17:26:15,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:26:15,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:15,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 469063935, now seen corresponding path program 1 times [2023-12-02 17:26:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:15,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830235736] [2023-12-02 17:26:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:15,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:15,678 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 17:26:15,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:15,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830235736] [2023-12-02 17:26:15,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830235736] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:15,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:15,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:15,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680610123] [2023-12-02 17:26:15,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:15,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:15,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:15,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:15,681 INFO L87 Difference]: Start difference. First operand 420 states and 576 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 17:26:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:15,782 INFO L93 Difference]: Finished difference Result 583 states and 794 transitions. [2023-12-02 17:26:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:15,783 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 17:26:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:15,786 INFO L225 Difference]: With dead ends: 583 [2023-12-02 17:26:15,787 INFO L226 Difference]: Without dead ends: 425 [2023-12-02 17:26:15,787 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 17:26:15,788 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 32 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:15,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 391 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-12-02 17:26:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 414. [2023-12-02 17:26:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 333 states have (on average 1.3693693693693694) internal successors, (456), 339 states have internal predecessors, (456), 54 states have call successors, (54), 26 states have call predecessors, (54), 25 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2023-12-02 17:26:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 562 transitions. [2023-12-02 17:26:15,822 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 562 transitions. Word has length 43 [2023-12-02 17:26:15,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:15,823 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 562 transitions. [2023-12-02 17:26:15,823 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 17:26:15,823 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 562 transitions. [2023-12-02 17:26:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 17:26:15,825 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:15,826 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 17:26:15,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:26:15,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:15,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:15,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2038631276, now seen corresponding path program 1 times [2023-12-02 17:26:15,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:15,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094831798] [2023-12-02 17:26:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:15,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:15,869 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 17:26:15,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:15,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094831798] [2023-12-02 17:26:15,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094831798] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:15,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:15,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:15,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145756407] [2023-12-02 17:26:15,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:15,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:15,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:15,872 INFO L87 Difference]: Start difference. First operand 414 states and 562 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 17:26:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:15,977 INFO L93 Difference]: Finished difference Result 663 states and 886 transitions. [2023-12-02 17:26:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:15,978 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 17:26:15,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:15,981 INFO L225 Difference]: With dead ends: 663 [2023-12-02 17:26:15,981 INFO L226 Difference]: Without dead ends: 460 [2023-12-02 17:26:15,982 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 17:26:15,983 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 180 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:15,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 232 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-12-02 17:26:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2023-12-02 17:26:16,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 372 states have (on average 1.3413978494623655) internal successors, (499), 378 states have internal predecessors, (499), 58 states have call successors, (58), 29 states have call predecessors, (58), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2023-12-02 17:26:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 613 transitions. [2023-12-02 17:26:16,021 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 613 transitions. Word has length 46 [2023-12-02 17:26:16,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:16,022 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 613 transitions. [2023-12-02 17:26:16,022 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 17:26:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 613 transitions. [2023-12-02 17:26:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 17:26:16,023 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:16,024 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 17:26:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:26:16,024 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:16,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 871130495, now seen corresponding path program 1 times [2023-12-02 17:26:16,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:16,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071939815] [2023-12-02 17:26:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:16,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:16,127 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 17:26:16,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:16,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071939815] [2023-12-02 17:26:16,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071939815] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:16,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:16,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:26:16,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188902364] [2023-12-02 17:26:16,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:16,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:26:16,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:26:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:26:16,129 INFO L87 Difference]: Start difference. First operand 460 states and 613 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 17:26:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:16,346 INFO L93 Difference]: Finished difference Result 500 states and 660 transitions. [2023-12-02 17:26:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:26:16,346 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 17:26:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:16,350 INFO L225 Difference]: With dead ends: 500 [2023-12-02 17:26:16,350 INFO L226 Difference]: Without dead ends: 497 [2023-12-02 17:26:16,351 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 17:26:16,351 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 336 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:16,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 231 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:16,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-12-02 17:26:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 459. [2023-12-02 17:26:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 372 states have (on average 1.336021505376344) internal successors, (497), 377 states have internal predecessors, (497), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2023-12-02 17:26:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 610 transitions. [2023-12-02 17:26:16,403 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 610 transitions. Word has length 47 [2023-12-02 17:26:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:16,403 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 610 transitions. [2023-12-02 17:26:16,403 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 17:26:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 610 transitions. [2023-12-02 17:26:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 17:26:16,405 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:16,405 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 17:26:16,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:26:16,405 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:16,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:16,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1234430607, now seen corresponding path program 1 times [2023-12-02 17:26:16,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:16,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27943641] [2023-12-02 17:26:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:16,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:16,527 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 17:26:16,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:16,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27943641] [2023-12-02 17:26:16,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27943641] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:16,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305877788] [2023-12-02 17:26:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:16,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:16,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:16,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:16,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:26:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:16,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:26:16,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:16,908 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 17:26:16,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:16,974 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 17:26:16,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305877788] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577352627] [2023-12-02 17:26:16,995 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 17:26:16,995 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:26:16,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:26:17,005 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:26:17,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:26:20,750 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 101 for LOIs [2023-12-02 17:26:20,801 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 126 for LOIs [2023-12-02 17:26:20,870 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 112 for LOIs [2023-12-02 17:26:22,361 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:26:35,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8089#(and (<= 1 |#StackHeapBarrier|) (= ~E_4~0 2) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (not (= ~p_num_write~0 1)) (= ~T4_E~0 2) (= ~p_last_write~0 0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (= ~c_last_read~0 0) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~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) (= ~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 17:26:35,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:26:35,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:26:35,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 17:26:35,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644807750] [2023-12-02 17:26:35,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:26:35,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:26:35,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:35,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:26:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:26:35,626 INFO L87 Difference]: Start difference. First operand 459 states and 610 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 17:26:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:35,898 INFO L93 Difference]: Finished difference Result 902 states and 1178 transitions. [2023-12-02 17:26:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:26:35,899 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 17:26:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:35,905 INFO L225 Difference]: With dead ends: 902 [2023-12-02 17:26:35,905 INFO L226 Difference]: Without dead ends: 899 [2023-12-02 17:26:35,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:26:35,907 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 452 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:35,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 696 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:26:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-12-02 17:26:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 668. [2023-12-02 17:26:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 549 states have (on average 1.3296903460837888) internal successors, (730), 556 states have internal predecessors, (730), 76 states have call successors, (76), 42 states have call predecessors, (76), 41 states have return successors, (75), 70 states have call predecessors, (75), 75 states have call successors, (75) [2023-12-02 17:26:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 881 transitions. [2023-12-02 17:26:35,962 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 881 transitions. Word has length 48 [2023-12-02 17:26:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:35,963 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 881 transitions. [2023-12-02 17:26:35,963 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 17:26:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 881 transitions. [2023-12-02 17:26:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 17:26:35,966 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:35,966 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 17:26:35,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:26:36,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 17:26:36,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:36,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1875276187, now seen corresponding path program 2 times [2023-12-02 17:26:36,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:36,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141686155] [2023-12-02 17:26:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:36,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:36,212 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 17:26:36,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:36,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141686155] [2023-12-02 17:26:36,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141686155] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:36,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:36,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901635993] [2023-12-02 17:26:36,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:36,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:36,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:36,215 INFO L87 Difference]: Start difference. First operand 668 states and 881 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 17:26:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:36,303 INFO L93 Difference]: Finished difference Result 998 states and 1314 transitions. [2023-12-02 17:26:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:36,304 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 17:26:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:36,308 INFO L225 Difference]: With dead ends: 998 [2023-12-02 17:26:36,308 INFO L226 Difference]: Without dead ends: 610 [2023-12-02 17:26:36,309 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 17:26:36,310 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 193 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:36,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 248 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:26:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-12-02 17:26:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 601. [2023-12-02 17:26:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 492 states have (on average 1.3191056910569106) internal successors, (649), 500 states have internal predecessors, (649), 70 states have call successors, (70), 38 states have call predecessors, (70), 37 states have return successors, (69), 63 states have call predecessors, (69), 69 states have call successors, (69) [2023-12-02 17:26:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 788 transitions. [2023-12-02 17:26:36,344 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 788 transitions. Word has length 61 [2023-12-02 17:26:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:36,345 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 788 transitions. [2023-12-02 17:26:36,345 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 17:26:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 788 transitions. [2023-12-02 17:26:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:26:36,347 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:36,348 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 17:26:36,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:26:36,348 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:36,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1342757308, now seen corresponding path program 1 times [2023-12-02 17:26:36,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:36,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22295397] [2023-12-02 17:26:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:36,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:36,475 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 17:26:36,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22295397] [2023-12-02 17:26:36,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22295397] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291811256] [2023-12-02 17:26:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:36,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:36,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:36,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:26:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:36,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:26:36,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:36,631 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 17:26:36,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:36,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291811256] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:36,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:36,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:26:36,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809514606] [2023-12-02 17:26:36,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:36,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:36,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:36,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:26:36,634 INFO L87 Difference]: Start difference. First operand 601 states and 788 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 17:26:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:36,728 INFO L93 Difference]: Finished difference Result 728 states and 947 transitions. [2023-12-02 17:26:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:36,729 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 17:26:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:36,731 INFO L225 Difference]: With dead ends: 728 [2023-12-02 17:26:36,731 INFO L226 Difference]: Without dead ends: 194 [2023-12-02 17:26:36,732 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 17:26:36,733 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 25 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:36,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 362 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-02 17:26:36,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-12-02 17:26:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 149 states have (on average 1.389261744966443) internal successors, (207), 151 states have internal predecessors, (207), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 17:26:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 271 transitions. [2023-12-02 17:26:36,752 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 271 transitions. Word has length 73 [2023-12-02 17:26:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:36,752 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 271 transitions. [2023-12-02 17:26:36,752 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 17:26:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 271 transitions. [2023-12-02 17:26:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 17:26:36,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:36,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:36,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 17:26:36,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:26:36,954 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:36,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1195059052, now seen corresponding path program 1 times [2023-12-02 17:26:36,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:36,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152736631] [2023-12-02 17:26:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:36,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:26:37,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:37,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152736631] [2023-12-02 17:26:37,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152736631] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:37,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425029350] [2023-12-02 17:26:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:37,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:37,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:37,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:37,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:26:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:37,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:26:37,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:26:37,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:37,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425029350] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:37,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:37,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 17:26:37,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638545676] [2023-12-02 17:26:37,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:37,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:37,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:37,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:37,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:26:37,195 INFO L87 Difference]: Start difference. First operand 194 states and 271 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 17:26:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:37,283 INFO L93 Difference]: Finished difference Result 563 states and 798 transitions. [2023-12-02 17:26:37,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:37,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 81 [2023-12-02 17:26:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:37,286 INFO L225 Difference]: With dead ends: 563 [2023-12-02 17:26:37,287 INFO L226 Difference]: Without dead ends: 375 [2023-12-02 17:26:37,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 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 17:26:37,288 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 125 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:37,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 266 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-12-02 17:26:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 371. [2023-12-02 17:26:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 288 states have (on average 1.3819444444444444) internal successors, (398), 291 states have internal predecessors, (398), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2023-12-02 17:26:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 514 transitions. [2023-12-02 17:26:37,311 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 514 transitions. Word has length 81 [2023-12-02 17:26:37,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:37,311 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 514 transitions. [2023-12-02 17:26:37,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 17:26:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 514 transitions. [2023-12-02 17:26:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 17:26:37,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:37,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:37,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:26:37,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 17:26:37,515 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:37,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1703903052, now seen corresponding path program 1 times [2023-12-02 17:26:37,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:37,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397262680] [2023-12-02 17:26:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:37,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:26:37,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:37,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397262680] [2023-12-02 17:26:37,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397262680] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:37,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819523563] [2023-12-02 17:26:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:37,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:37,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:37,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:37,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:26:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:37,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:26:37,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:26:37,768 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819523563] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:37,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:37,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 17:26:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283279548] [2023-12-02 17:26:37,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:37,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:37,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:37,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:26:37,771 INFO L87 Difference]: Start difference. First operand 371 states and 514 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 17:26:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:37,882 INFO L93 Difference]: Finished difference Result 1088 states and 1529 transitions. [2023-12-02 17:26:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 81 [2023-12-02 17:26:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:37,886 INFO L225 Difference]: With dead ends: 1088 [2023-12-02 17:26:37,886 INFO L226 Difference]: Without dead ends: 723 [2023-12-02 17:26:37,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 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 17:26:37,888 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 119 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:37,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 247 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2023-12-02 17:26:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 717. [2023-12-02 17:26:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 560 states have (on average 1.3714285714285714) internal successors, (768), 565 states have internal predecessors, (768), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2023-12-02 17:26:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 984 transitions. [2023-12-02 17:26:37,934 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 984 transitions. Word has length 81 [2023-12-02 17:26:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:37,934 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 984 transitions. [2023-12-02 17:26:37,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 17:26:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 984 transitions. [2023-12-02 17:26:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 17:26:37,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:37,937 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:37,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:26:38,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:38,138 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:38,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:38,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1870971092, now seen corresponding path program 1 times [2023-12-02 17:26:38,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:38,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166866156] [2023-12-02 17:26:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:38,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 17:26:38,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166866156] [2023-12-02 17:26:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166866156] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:38,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:38,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358512214] [2023-12-02 17:26:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:38,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:38,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:38,214 INFO L87 Difference]: Start difference. First operand 717 states and 984 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 17:26:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:38,322 INFO L93 Difference]: Finished difference Result 1279 states and 1773 transitions. [2023-12-02 17:26:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:38,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 81 [2023-12-02 17:26:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:38,327 INFO L225 Difference]: With dead ends: 1279 [2023-12-02 17:26:38,327 INFO L226 Difference]: Without dead ends: 913 [2023-12-02 17:26:38,329 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 17:26:38,329 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 59 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:38,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 307 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2023-12-02 17:26:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 841. [2023-12-02 17:26:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 676 states have (on average 1.4023668639053255) internal successors, (948), 681 states have internal predecessors, (948), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2023-12-02 17:26:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1172 transitions. [2023-12-02 17:26:38,378 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1172 transitions. Word has length 81 [2023-12-02 17:26:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:38,378 INFO L495 AbstractCegarLoop]: Abstraction has 841 states and 1172 transitions. [2023-12-02 17:26:38,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 17:26:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1172 transitions. [2023-12-02 17:26:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 17:26:38,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:38,381 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:38,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 17:26:38,382 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:38,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -673053680, now seen corresponding path program 1 times [2023-12-02 17:26:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:38,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562033731] [2023-12-02 17:26:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:38,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 17:26:38,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:38,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562033731] [2023-12-02 17:26:38,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562033731] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:38,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:38,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862919505] [2023-12-02 17:26:38,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:38,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:38,437 INFO L87 Difference]: Start difference. First operand 841 states and 1172 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 17:26:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:38,598 INFO L93 Difference]: Finished difference Result 2474 states and 3481 transitions. [2023-12-02 17:26:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:38,599 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), 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 108 [2023-12-02 17:26:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:38,607 INFO L225 Difference]: With dead ends: 2474 [2023-12-02 17:26:38,608 INFO L226 Difference]: Without dead ends: 1639 [2023-12-02 17:26:38,609 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 17:26:38,610 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 112 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 231 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 17:26:38,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 231 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2023-12-02 17:26:38,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1625. [2023-12-02 17:26:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1308 states have (on average 1.385321100917431) internal successors, (1812), 1317 states have internal predecessors, (1812), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2023-12-02 17:26:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2236 transitions. [2023-12-02 17:26:38,701 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2236 transitions. Word has length 108 [2023-12-02 17:26:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:38,701 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 2236 transitions. [2023-12-02 17:26:38,702 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), 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 17:26:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2236 transitions. [2023-12-02 17:26:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 17:26:38,706 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:38,706 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:38,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 17:26:38,706 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:38,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:38,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1856027295, now seen corresponding path program 1 times [2023-12-02 17:26:38,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:38,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407398087] [2023-12-02 17:26:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:38,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 17:26:38,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:38,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407398087] [2023-12-02 17:26:38,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407398087] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:38,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:38,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:38,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700333712] [2023-12-02 17:26:38,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:38,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:38,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:38,761 INFO L87 Difference]: Start difference. First operand 1625 states and 2236 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 17:26:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:38,992 INFO L93 Difference]: Finished difference Result 4790 states and 6649 transitions. [2023-12-02 17:26:38,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:38,992 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), 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 108 [2023-12-02 17:26:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:39,007 INFO L225 Difference]: With dead ends: 4790 [2023-12-02 17:26:39,007 INFO L226 Difference]: Without dead ends: 3171 [2023-12-02 17:26:39,012 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 17:26:39,012 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 114 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 246 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 17:26:39,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 246 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2023-12-02 17:26:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 3145. [2023-12-02 17:26:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 2532 states have (on average 1.3665086887835702) internal successors, (3460), 2549 states have internal predecessors, (3460), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2023-12-02 17:26:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 4268 transitions. [2023-12-02 17:26:39,193 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 4268 transitions. Word has length 108 [2023-12-02 17:26:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:39,193 INFO L495 AbstractCegarLoop]: Abstraction has 3145 states and 4268 transitions. [2023-12-02 17:26:39,193 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), 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 17:26:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 4268 transitions. [2023-12-02 17:26:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:26:39,201 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:39,201 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, 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 17:26:39,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 17:26:39,201 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:39,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:39,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1774939735, now seen corresponding path program 1 times [2023-12-02 17:26:39,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:39,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185788742] [2023-12-02 17:26:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:39,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 17:26:39,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:39,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185788742] [2023-12-02 17:26:39,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185788742] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:39,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55271315] [2023-12-02 17:26:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:39,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:39,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:39,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:39,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:26:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:39,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:26:39,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:39,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:39,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55271315] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:39,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:39,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:26:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796981330] [2023-12-02 17:26:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:39,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:39,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:39,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:26:39,481 INFO L87 Difference]: Start difference. First operand 3145 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 17:26:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:39,733 INFO L93 Difference]: Finished difference Result 5837 states and 8022 transitions. [2023-12-02 17:26:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 123 [2023-12-02 17:26:39,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:39,753 INFO L225 Difference]: With dead ends: 5837 [2023-12-02 17:26:39,753 INFO L226 Difference]: Without dead ends: 4219 [2023-12-02 17:26:39,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 17:26:39,758 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 72 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:39,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 307 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4219 states. [2023-12-02 17:26:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4219 to 3777. [2023-12-02 17:26:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3116 states have (on average 1.392811296534018) internal successors, (4340), 3133 states have internal predecessors, (4340), 428 states have call successors, (428), 232 states have call predecessors, (428), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2023-12-02 17:26:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 5196 transitions. [2023-12-02 17:26:39,982 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 5196 transitions. Word has length 123 [2023-12-02 17:26:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:39,982 INFO L495 AbstractCegarLoop]: Abstraction has 3777 states and 5196 transitions. [2023-12-02 17:26:39,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 17:26:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 5196 transitions. [2023-12-02 17:26:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:26:39,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:39,993 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:39,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:26:40,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 17:26:40,194 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:40,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1532852784, now seen corresponding path program 1 times [2023-12-02 17:26:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:40,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104956385] [2023-12-02 17:26:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:40,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 17:26:40,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:40,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104956385] [2023-12-02 17:26:40,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104956385] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:40,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190503013] [2023-12-02 17:26:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:40,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:40,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:40,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:40,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:26:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:40,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:26:40,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:40,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190503013] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:40,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:40,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:26:40,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555930580] [2023-12-02 17:26:40,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:40,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:40,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:40,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:40,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:26:40,487 INFO L87 Difference]: Start difference. First operand 3777 states and 5196 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 17:26:40,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:40,877 INFO L93 Difference]: Finished difference Result 7097 states and 9842 transitions. [2023-12-02 17:26:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 123 [2023-12-02 17:26:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:40,910 INFO L225 Difference]: With dead ends: 7097 [2023-12-02 17:26:40,910 INFO L226 Difference]: Without dead ends: 5169 [2023-12-02 17:26:40,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 17:26:40,918 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 78 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:40,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 326 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2023-12-02 17:26:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 4671. [2023-12-02 17:26:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 3938 states have (on average 1.409852717115287) internal successors, (5552), 3955 states have internal predecessors, (5552), 464 states have call successors, (464), 268 states have call predecessors, (464), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2023-12-02 17:26:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 6480 transitions. [2023-12-02 17:26:41,349 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 6480 transitions. Word has length 123 [2023-12-02 17:26:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:41,349 INFO L495 AbstractCegarLoop]: Abstraction has 4671 states and 6480 transitions. [2023-12-02 17:26:41,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 17:26:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 6480 transitions. [2023-12-02 17:26:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:26:41,365 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:41,365 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, 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 17:26:41,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:26:41,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 17:26:41,566 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:41,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1590582495, now seen corresponding path program 1 times [2023-12-02 17:26:41,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:41,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634908997] [2023-12-02 17:26:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:41,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 17:26:41,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:41,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634908997] [2023-12-02 17:26:41,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634908997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:41,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760579904] [2023-12-02 17:26:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:41,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:41,681 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:41,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:26:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:41,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:26:41,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:41,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:41,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760579904] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:41,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:41,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:26:41,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877632725] [2023-12-02 17:26:41,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:41,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:41,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:26:41,871 INFO L87 Difference]: Start difference. First operand 4671 states and 6480 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 17:26:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:42,208 INFO L93 Difference]: Finished difference Result 8941 states and 12500 transitions. [2023-12-02 17:26:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 123 [2023-12-02 17:26:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:42,242 INFO L225 Difference]: With dead ends: 8941 [2023-12-02 17:26:42,242 INFO L226 Difference]: Without dead ends: 6530 [2023-12-02 17:26:42,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 17:26:42,250 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 84 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:42,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 331 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6530 states. [2023-12-02 17:26:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6530 to 5976. [2023-12-02 17:26:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5976 states, 5135 states have (on average 1.4212268743914314) internal successors, (7298), 5152 states have internal predecessors, (7298), 518 states have call successors, (518), 322 states have call predecessors, (518), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2023-12-02 17:26:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5976 states to 5976 states and 8334 transitions. [2023-12-02 17:26:42,659 INFO L78 Accepts]: Start accepts. Automaton has 5976 states and 8334 transitions. Word has length 123 [2023-12-02 17:26:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:42,660 INFO L495 AbstractCegarLoop]: Abstraction has 5976 states and 8334 transitions. [2023-12-02 17:26:42,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 17:26:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 5976 states and 8334 transitions. [2023-12-02 17:26:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:26:42,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:42,677 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:42,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:26:42,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 17:26:42,878 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:42,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:42,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1259853262, now seen corresponding path program 1 times [2023-12-02 17:26:42,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:42,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76772570] [2023-12-02 17:26:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:42,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 17:26:42,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:42,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76772570] [2023-12-02 17:26:42,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76772570] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:42,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038842706] [2023-12-02 17:26:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:42,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:42,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:42,984 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:42,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:26:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:43,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:26:43,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 17:26:43,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:43,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038842706] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:43,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:43,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:26:43,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365218540] [2023-12-02 17:26:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:43,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:26:43,182 INFO L87 Difference]: Start difference. First operand 5976 states and 8334 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 17:26:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:43,541 INFO L93 Difference]: Finished difference Result 9740 states and 13539 transitions. [2023-12-02 17:26:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:43,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 123 [2023-12-02 17:26:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:43,569 INFO L225 Difference]: With dead ends: 9740 [2023-12-02 17:26:43,569 INFO L226 Difference]: Without dead ends: 6690 [2023-12-02 17:26:43,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 17:26:43,579 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 112 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:43,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 165 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:26:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6690 states. [2023-12-02 17:26:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6690 to 6690. [2023-12-02 17:26:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6690 states, 5757 states have (on average 1.3979503213479243) internal successors, (8048), 5774 states have internal predecessors, (8048), 548 states have call successors, (548), 384 states have call predecessors, (548), 384 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2023-12-02 17:26:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6690 states to 6690 states and 9144 transitions. [2023-12-02 17:26:44,095 INFO L78 Accepts]: Start accepts. Automaton has 6690 states and 9144 transitions. Word has length 123 [2023-12-02 17:26:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:44,096 INFO L495 AbstractCegarLoop]: Abstraction has 6690 states and 9144 transitions. [2023-12-02 17:26:44,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 17:26:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6690 states and 9144 transitions. [2023-12-02 17:26:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:26:44,111 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:44,111 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, 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 17:26:44,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:26:44,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:44,320 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:44,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:44,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1458556275, now seen corresponding path program 1 times [2023-12-02 17:26:44,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:44,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860920799] [2023-12-02 17:26:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:44,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 17:26:44,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:44,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860920799] [2023-12-02 17:26:44,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860920799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:44,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475940089] [2023-12-02 17:26:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:44,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:44,423 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:44,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:26:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:44,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:26:44,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:26:44,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:44,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475940089] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:44,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:44,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:26:44,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129241218] [2023-12-02 17:26:44,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:44,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:44,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:44,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:44,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:26:44,595 INFO L87 Difference]: Start difference. First operand 6690 states and 9144 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 17:26:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:45,026 INFO L93 Difference]: Finished difference Result 12480 states and 17171 transitions. [2023-12-02 17:26:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 123 [2023-12-02 17:26:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:45,047 INFO L225 Difference]: With dead ends: 12480 [2023-12-02 17:26:45,048 INFO L226 Difference]: Without dead ends: 9062 [2023-12-02 17:26:45,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 17:26:45,055 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 66 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:45,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 318 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:26:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9062 states. [2023-12-02 17:26:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9062 to 8526. [2023-12-02 17:26:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8526 states, 7431 states have (on average 1.4027721706365226) internal successors, (10424), 7448 states have internal predecessors, (10424), 629 states have call successors, (629), 465 states have call predecessors, (629), 465 states have return successors, (629), 613 states have call predecessors, (629), 629 states have call successors, (629) [2023-12-02 17:26:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8526 states to 8526 states and 11682 transitions. [2023-12-02 17:26:45,461 INFO L78 Accepts]: Start accepts. Automaton has 8526 states and 11682 transitions. Word has length 123 [2023-12-02 17:26:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:45,461 INFO L495 AbstractCegarLoop]: Abstraction has 8526 states and 11682 transitions. [2023-12-02 17:26:45,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 17:26:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 8526 states and 11682 transitions. [2023-12-02 17:26:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:26:45,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:45,477 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, 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 17:26:45,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 17:26:45,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:45,677 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:45,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash 523050299, now seen corresponding path program 2 times [2023-12-02 17:26:45,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:45,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377395778] [2023-12-02 17:26:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:26:45,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:45,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377395778] [2023-12-02 17:26:45,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377395778] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:45,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082937881] [2023-12-02 17:26:45,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:26:45,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:45,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:45,862 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:45,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:26:46,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 17:26:46,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:26:46,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:26:46,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:26:46,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:46,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082937881] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:46,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:46,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:26:46,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307656655] [2023-12-02 17:26:46,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:46,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:46,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:46,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:46,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:26:46,028 INFO L87 Difference]: Start difference. First operand 8526 states and 11682 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:26:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:46,484 INFO L93 Difference]: Finished difference Result 13852 states and 19188 transitions. [2023-12-02 17:26:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:46,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2023-12-02 17:26:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:46,505 INFO L225 Difference]: With dead ends: 13852 [2023-12-02 17:26:46,506 INFO L226 Difference]: Without dead ends: 8544 [2023-12-02 17:26:46,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:26:46,515 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 122 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:46,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 320 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:46,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8544 states. [2023-12-02 17:26:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8544 to 8396. [2023-12-02 17:26:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8396 states, 7301 states have (on average 1.3833721408026298) internal successors, (10100), 7318 states have internal predecessors, (10100), 629 states have call successors, (629), 465 states have call predecessors, (629), 465 states have return successors, (629), 613 states have call predecessors, (629), 629 states have call successors, (629) [2023-12-02 17:26:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8396 states to 8396 states and 11358 transitions. [2023-12-02 17:26:47,069 INFO L78 Accepts]: Start accepts. Automaton has 8396 states and 11358 transitions. Word has length 123 [2023-12-02 17:26:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:47,069 INFO L495 AbstractCegarLoop]: Abstraction has 8396 states and 11358 transitions. [2023-12-02 17:26:47,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:26:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 8396 states and 11358 transitions. [2023-12-02 17:26:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:26:47,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:47,088 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:47,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 17:26:47,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 17:26:47,292 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:47,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:47,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1658594917, now seen corresponding path program 1 times [2023-12-02 17:26:47,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:47,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596443773] [2023-12-02 17:26:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:26:47,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:47,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596443773] [2023-12-02 17:26:47,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596443773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:47,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110766926] [2023-12-02 17:26:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:47,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:47,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:47,538 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:47,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:26:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:47,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:26:47,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:26:47,739 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:26:47,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110766926] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:47,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:47,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:26:47,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668875131] [2023-12-02 17:26:47,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:47,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:47,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:26:47,741 INFO L87 Difference]: Start difference. First operand 8396 states and 11358 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:26:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:48,387 INFO L93 Difference]: Finished difference Result 21069 states and 28751 transitions. [2023-12-02 17:26:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:48,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2023-12-02 17:26:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:48,408 INFO L225 Difference]: With dead ends: 21069 [2023-12-02 17:26:48,408 INFO L226 Difference]: Without dead ends: 12680 [2023-12-02 17:26:48,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:26:48,421 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 62 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:48,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 245 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12680 states. [2023-12-02 17:26:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12680 to 10267. [2023-12-02 17:26:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10267 states, 9006 states have (on average 1.3917388407728182) internal successors, (12534), 9024 states have internal predecessors, (12534), 712 states have call successors, (712), 548 states have call predecessors, (712), 548 states have return successors, (712), 695 states have call predecessors, (712), 712 states have call successors, (712) [2023-12-02 17:26:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10267 states to 10267 states and 13958 transitions. [2023-12-02 17:26:48,964 INFO L78 Accepts]: Start accepts. Automaton has 10267 states and 13958 transitions. Word has length 123 [2023-12-02 17:26:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:48,964 INFO L495 AbstractCegarLoop]: Abstraction has 10267 states and 13958 transitions. [2023-12-02 17:26:48,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:26:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10267 states and 13958 transitions. [2023-12-02 17:26:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 17:26:48,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:48,986 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-12-02 17:26:48,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 17:26:49,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:49,186 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:26:49,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1307692942, now seen corresponding path program 1 times [2023-12-02 17:26:49,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:49,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615818686] [2023-12-02 17:26:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:49,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 17:26:49,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:49,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615818686] [2023-12-02 17:26:49,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615818686] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:49,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580062664] [2023-12-02 17:26:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:49,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:49,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:49,573 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:49,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 17:26:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:49,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:26:49,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:26:49,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 17:26:50,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580062664] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:26:50,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952287982] [2023-12-02 17:26:50,075 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-12-02 17:26:50,075 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:26:50,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:26:50,076 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:26:50,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:27:09,926 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 66 for LOIs [2023-12-02 17:27:09,960 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 66 for LOIs [2023-12-02 17:27:10,013 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 131 for LOIs [2023-12-02 17:27:10,132 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:27:10,376 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 66 for LOIs [2023-12-02 17:27:11,712 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 162 for LOIs [2023-12-02 17:27:11,930 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:27:26,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '192757#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ ~local~0 4))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (<= 0 |ULTIMATE.start_eval2_~tmp~4#1|) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (<= |ULTIMATE.start_eval2_~tmp~4#1| 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (not (= |ULTIMATE.start_eval2_~tmp~4#1| 0)) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~a_t~0 0) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 17:27:26,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:27:26,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:27:26,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 9 [2023-12-02 17:27:26,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704874339] [2023-12-02 17:27:26,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:27:26,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:27:26,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:26,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:27:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2965, Unknown=0, NotChecked=0, Total=3306 [2023-12-02 17:27:26,187 INFO L87 Difference]: Start difference. First operand 10267 states and 13958 transitions. Second operand has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 5 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) [2023-12-02 17:27:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:27,130 INFO L93 Difference]: Finished difference Result 24243 states and 32836 transitions. [2023-12-02 17:27:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:27:27,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 5 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) Word has length 128 [2023-12-02 17:27:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:27,159 INFO L225 Difference]: With dead ends: 24243 [2023-12-02 17:27:27,160 INFO L226 Difference]: Without dead ends: 13983 [2023-12-02 17:27:27,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 331 SyntacticMatches, 12 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=404, Invalid=3628, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 17:27:27,180 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 331 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:27,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 467 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:27:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13983 states. [2023-12-02 17:27:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13983 to 13733. [2023-12-02 17:27:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13733 states, 11964 states have (on average 1.3691073219658978) internal successors, (16380), 11990 states have internal predecessors, (16380), 1002 states have call successors, (1002), 766 states have call predecessors, (1002), 766 states have return successors, (1002), 977 states have call predecessors, (1002), 1002 states have call successors, (1002) [2023-12-02 17:27:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13733 states to 13733 states and 18384 transitions. [2023-12-02 17:27:28,084 INFO L78 Accepts]: Start accepts. Automaton has 13733 states and 18384 transitions. Word has length 128 [2023-12-02 17:27:28,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:28,084 INFO L495 AbstractCegarLoop]: Abstraction has 13733 states and 18384 transitions. [2023-12-02 17:27:28,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 5 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) [2023-12-02 17:27:28,084 INFO L276 IsEmpty]: Start isEmpty. Operand 13733 states and 18384 transitions. [2023-12-02 17:27:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 17:27:28,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:28,099 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:28,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 17:27:28,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:28,300 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:28,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1588126261, now seen corresponding path program 1 times [2023-12-02 17:27:28,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:28,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404860025] [2023-12-02 17:27:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:28,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:27:28,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:28,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404860025] [2023-12-02 17:27:28,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404860025] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:27:28,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446161853] [2023-12-02 17:27:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:28,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:28,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:28,490 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:28,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:27:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:28,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:27:28,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:27:28,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:27:28,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446161853] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:28,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:27:28,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:27:28,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221290046] [2023-12-02 17:27:28,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:28,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:27:28,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:27:28,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:27:28,702 INFO L87 Difference]: Start difference. First operand 13733 states and 18384 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:27:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:29,470 INFO L93 Difference]: Finished difference Result 23603 states and 31886 transitions. [2023-12-02 17:27:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:27:29,470 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 125 [2023-12-02 17:27:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:29,499 INFO L225 Difference]: With dead ends: 23603 [2023-12-02 17:27:29,499 INFO L226 Difference]: Without dead ends: 13751 [2023-12-02 17:27:29,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:27:29,515 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 86 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:29,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 306 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:27:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13751 states. [2023-12-02 17:27:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13751 to 13549. [2023-12-02 17:27:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13549 states, 11780 states have (on average 1.3511035653650254) internal successors, (15916), 11806 states have internal predecessors, (15916), 1002 states have call successors, (1002), 766 states have call predecessors, (1002), 766 states have return successors, (1002), 977 states have call predecessors, (1002), 1002 states have call successors, (1002) [2023-12-02 17:27:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13549 states to 13549 states and 17920 transitions. [2023-12-02 17:27:30,291 INFO L78 Accepts]: Start accepts. Automaton has 13549 states and 17920 transitions. Word has length 125 [2023-12-02 17:27:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:30,292 INFO L495 AbstractCegarLoop]: Abstraction has 13549 states and 17920 transitions. [2023-12-02 17:27:30,292 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:27:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 13549 states and 17920 transitions. [2023-12-02 17:27:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-02 17:27:30,302 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:30,303 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:30,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 17:27:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:30,503 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:30,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1956116555, now seen corresponding path program 1 times [2023-12-02 17:27:30,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:30,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606343071] [2023-12-02 17:27:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 17:27:30,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:30,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606343071] [2023-12-02 17:27:30,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606343071] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:27:30,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872535149] [2023-12-02 17:27:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:30,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:30,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:30,657 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:30,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 17:27:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:30,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:27:30,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:27:30,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:27:30,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872535149] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:30,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:27:30,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 17:27:30,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673783658] [2023-12-02 17:27:30,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:30,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:27:30,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:30,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:27:30,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:27:30,877 INFO L87 Difference]: Start difference. First operand 13549 states and 17920 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:27:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:32,029 INFO L93 Difference]: Finished difference Result 31789 states and 41978 transitions. [2023-12-02 17:27:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:27:32,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2023-12-02 17:27:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:32,057 INFO L225 Difference]: With dead ends: 31789 [2023-12-02 17:27:32,057 INFO L226 Difference]: Without dead ends: 18247 [2023-12-02 17:27:32,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:27:32,076 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 404 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:32,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 270 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:27:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18247 states. [2023-12-02 17:27:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18247 to 18245. [2023-12-02 17:27:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18245 states, 15756 states have (on average 1.3297791317593297) internal successors, (20952), 15794 states have internal predecessors, (20952), 1414 states have call successors, (1414), 1074 states have call predecessors, (1414), 1074 states have return successors, (1414), 1377 states have call predecessors, (1414), 1414 states have call successors, (1414) [2023-12-02 17:27:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18245 states to 18245 states and 23780 transitions. [2023-12-02 17:27:33,235 INFO L78 Accepts]: Start accepts. Automaton has 18245 states and 23780 transitions. Word has length 126 [2023-12-02 17:27:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:33,235 INFO L495 AbstractCegarLoop]: Abstraction has 18245 states and 23780 transitions. [2023-12-02 17:27:33,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:27:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 18245 states and 23780 transitions. [2023-12-02 17:27:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 17:27:33,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:33,251 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:33,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 17:27:33,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 17:27:33,451 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:33,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1310229014, now seen corresponding path program 1 times [2023-12-02 17:27:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:33,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517916925] [2023-12-02 17:27:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:33,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 17:27:33,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517916925] [2023-12-02 17:27:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517916925] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:27:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923527499] [2023-12-02 17:27:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:33,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:33,641 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:33,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:27:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:33,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:27:33,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:27:33,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:27:33,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923527499] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:33,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:27:33,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:27:33,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796864979] [2023-12-02 17:27:33,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:33,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:27:33,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:27:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:27:33,806 INFO L87 Difference]: Start difference. First operand 18245 states and 23780 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 17:27:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:34,938 INFO L93 Difference]: Finished difference Result 31421 states and 41454 transitions. [2023-12-02 17:27:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:27:34,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 130 [2023-12-02 17:27:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:34,972 INFO L225 Difference]: With dead ends: 31421 [2023-12-02 17:27:34,973 INFO L226 Difference]: Without dead ends: 18271 [2023-12-02 17:27:34,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:27:34,990 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 105 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:34,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 315 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:27:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18271 states. [2023-12-02 17:27:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18271 to 18005. [2023-12-02 17:27:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18005 states, 15516 states have (on average 1.3101314771848414) internal successors, (20328), 15554 states have internal predecessors, (20328), 1414 states have call successors, (1414), 1074 states have call predecessors, (1414), 1074 states have return successors, (1414), 1377 states have call predecessors, (1414), 1414 states have call successors, (1414) [2023-12-02 17:27:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18005 states to 18005 states and 23156 transitions. [2023-12-02 17:27:36,118 INFO L78 Accepts]: Start accepts. Automaton has 18005 states and 23156 transitions. Word has length 130 [2023-12-02 17:27:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:36,118 INFO L495 AbstractCegarLoop]: Abstraction has 18005 states and 23156 transitions. [2023-12-02 17:27:36,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 17:27:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 18005 states and 23156 transitions. [2023-12-02 17:27:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 17:27:36,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:36,135 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:36,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 17:27:36,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 17:27:36,336 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:36,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash -62961560, now seen corresponding path program 1 times [2023-12-02 17:27:36,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:36,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823359480] [2023-12-02 17:27:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:36,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 17:27:36,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:36,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823359480] [2023-12-02 17:27:36,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823359480] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:27:36,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432363761] [2023-12-02 17:27:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:36,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:36,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:36,525 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:36,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 17:27:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:36,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:27:36,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:27:36,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:27:36,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432363761] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:36,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:27:36,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 17:27:36,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559621882] [2023-12-02 17:27:36,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:36,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:27:36,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:27:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:27:36,693 INFO L87 Difference]: Start difference. First operand 18005 states and 23156 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 17:27:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:37,760 INFO L93 Difference]: Finished difference Result 24874 states and 31964 transitions. [2023-12-02 17:27:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:27:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 130 [2023-12-02 17:27:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:37,792 INFO L225 Difference]: With dead ends: 24874 [2023-12-02 17:27:37,792 INFO L226 Difference]: Without dead ends: 18508 [2023-12-02 17:27:37,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 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 17:27:37,802 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 110 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:37,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 453 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:27:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18508 states. [2023-12-02 17:27:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18508 to 18398. [2023-12-02 17:27:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18398 states, 15850 states have (on average 1.3070031545741325) internal successors, (20716), 15912 states have internal predecessors, (20716), 1421 states have call successors, (1421), 1078 states have call predecessors, (1421), 1126 states have return successors, (1469), 1408 states have call predecessors, (1469), 1421 states have call successors, (1469) [2023-12-02 17:27:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18398 states to 18398 states and 23606 transitions. [2023-12-02 17:27:38,935 INFO L78 Accepts]: Start accepts. Automaton has 18398 states and 23606 transitions. Word has length 130 [2023-12-02 17:27:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:38,935 INFO L495 AbstractCegarLoop]: Abstraction has 18398 states and 23606 transitions. [2023-12-02 17:27:38,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 17:27:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 18398 states and 23606 transitions. [2023-12-02 17:27:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 17:27:38,955 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:38,956 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:38,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 17:27:39,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 17:27:39,156 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:39,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:39,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1595160587, now seen corresponding path program 1 times [2023-12-02 17:27:39,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:39,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029472457] [2023-12-02 17:27:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 17:27:39,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:39,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029472457] [2023-12-02 17:27:39,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029472457] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:27:39,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201717586] [2023-12-02 17:27:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:39,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:39,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:39,298 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:39,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 17:27:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:39,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:27:39,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:27:39,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:27:39,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201717586] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:39,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:27:39,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:27:39,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556891887] [2023-12-02 17:27:39,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:39,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:27:39,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:27:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:27:39,453 INFO L87 Difference]: Start difference. First operand 18398 states and 23606 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:27:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:40,515 INFO L93 Difference]: Finished difference Result 24880 states and 32031 transitions. [2023-12-02 17:27:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:27:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2023-12-02 17:27:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:40,555 INFO L225 Difference]: With dead ends: 24880 [2023-12-02 17:27:40,555 INFO L226 Difference]: Without dead ends: 17962 [2023-12-02 17:27:40,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:27:40,566 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:40,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 250 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:27:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17962 states. [2023-12-02 17:27:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17962 to 17334. [2023-12-02 17:27:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17334 states, 14930 states have (on average 1.3141326188881446) internal successors, (19620), 14956 states have internal predecessors, (19620), 1373 states have call successors, (1373), 1030 states have call predecessors, (1373), 1030 states have return successors, (1373), 1348 states have call predecessors, (1373), 1373 states have call successors, (1373) [2023-12-02 17:27:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17334 states to 17334 states and 22366 transitions. [2023-12-02 17:27:41,587 INFO L78 Accepts]: Start accepts. Automaton has 17334 states and 22366 transitions. Word has length 131 [2023-12-02 17:27:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:41,587 INFO L495 AbstractCegarLoop]: Abstraction has 17334 states and 22366 transitions. [2023-12-02 17:27:41,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:27:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 17334 states and 22366 transitions. [2023-12-02 17:27:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-02 17:27:41,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:41,601 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:41,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 17:27:41,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 17:27:41,802 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:41,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:41,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2067446036, now seen corresponding path program 1 times [2023-12-02 17:27:41,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:41,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992335708] [2023-12-02 17:27:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:41,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 17:27:41,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:41,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992335708] [2023-12-02 17:27:41,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992335708] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:27:41,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966361190] [2023-12-02 17:27:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:41,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:41,968 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:41,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 17:27:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:42,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:27:42,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 17:27:42,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:27:42,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966361190] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:42,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:27:42,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 17:27:42,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328954791] [2023-12-02 17:27:42,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:42,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:27:42,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:27:42,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:27:42,134 INFO L87 Difference]: Start difference. First operand 17334 states and 22366 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:27:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:43,811 INFO L93 Difference]: Finished difference Result 40698 states and 52500 transitions. [2023-12-02 17:27:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:27:43,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 132 [2023-12-02 17:27:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:43,843 INFO L225 Difference]: With dead ends: 40698 [2023-12-02 17:27:43,843 INFO L226 Difference]: Without dead ends: 23416 [2023-12-02 17:27:43,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:27:43,857 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 330 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:43,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 334 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:27:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23416 states. [2023-12-02 17:27:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23416 to 23414. [2023-12-02 17:27:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23414 states, 20036 states have (on average 1.2946695947294868) internal successors, (25940), 20074 states have internal predecessors, (25940), 1935 states have call successors, (1935), 1442 states have call predecessors, (1935), 1442 states have return successors, (1935), 1898 states have call predecessors, (1935), 1935 states have call successors, (1935) [2023-12-02 17:27:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23414 states to 23414 states and 29810 transitions. [2023-12-02 17:27:45,393 INFO L78 Accepts]: Start accepts. Automaton has 23414 states and 29810 transitions. Word has length 132 [2023-12-02 17:27:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:45,393 INFO L495 AbstractCegarLoop]: Abstraction has 23414 states and 29810 transitions. [2023-12-02 17:27:45,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:27:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 23414 states and 29810 transitions. [2023-12-02 17:27:45,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 17:27:45,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:45,411 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:45,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 17:27:45,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 17:27:45,612 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:45,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:45,614 INFO L85 PathProgramCache]: Analyzing trace with hash -813661982, now seen corresponding path program 1 times [2023-12-02 17:27:45,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:45,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197380065] [2023-12-02 17:27:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:45,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 17:27:45,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:45,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197380065] [2023-12-02 17:27:45,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197380065] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:27:45,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642669880] [2023-12-02 17:27:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:45,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:45,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:45,783 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:45,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 17:27:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:45,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:27:45,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:27:45,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:27:45,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642669880] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:45,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:27:45,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 17:27:45,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977246598] [2023-12-02 17:27:45,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:45,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:27:45,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:45,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:27:45,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:27:45,982 INFO L87 Difference]: Start difference. First operand 23414 states and 29810 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:27:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:48,648 INFO L93 Difference]: Finished difference Result 54903 states and 69726 transitions. [2023-12-02 17:27:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:27:48,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2023-12-02 17:27:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:48,691 INFO L225 Difference]: With dead ends: 54903 [2023-12-02 17:27:48,691 INFO L226 Difference]: Without dead ends: 31541 [2023-12-02 17:27:48,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:27:48,708 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 411 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:48,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 257 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:27:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31541 states. [2023-12-02 17:27:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31541 to 31539. [2023-12-02 17:27:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31539 states, 26781 states have (on average 1.2694820955154773) internal successors, (33998), 26837 states have internal predecessors, (33998), 2733 states have call successors, (2733), 2024 states have call predecessors, (2733), 2024 states have return successors, (2733), 2678 states have call predecessors, (2733), 2733 states have call successors, (2733) [2023-12-02 17:27:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31539 states to 31539 states and 39464 transitions. [2023-12-02 17:27:50,942 INFO L78 Accepts]: Start accepts. Automaton has 31539 states and 39464 transitions. Word has length 136 [2023-12-02 17:27:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:50,942 INFO L495 AbstractCegarLoop]: Abstraction has 31539 states and 39464 transitions. [2023-12-02 17:27:50,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:27:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 31539 states and 39464 transitions. [2023-12-02 17:27:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 17:27:50,967 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:50,967 INFO L195 NwaCegarLoop]: trace histogram [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, 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 17:27:50,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 17:27:51,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:51,168 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:51,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1984821268, now seen corresponding path program 1 times [2023-12-02 17:27:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:51,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802004619] [2023-12-02 17:27:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:51,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 17 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 17:27:51,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:51,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802004619] [2023-12-02 17:27:51,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802004619] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:27:51,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566661764] [2023-12-02 17:27:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:51,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:51,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:51,285 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:51,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 17:27:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:51,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:27:51,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:27:51,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:27:51,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566661764] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:51,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:27:51,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 17:27:51,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767105538] [2023-12-02 17:27:51,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:51,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:27:51,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:27:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:27:51,442 INFO L87 Difference]: Start difference. First operand 31539 states and 39464 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:27:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:53,985 INFO L93 Difference]: Finished difference Result 57217 states and 72037 transitions. [2023-12-02 17:27:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:27:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 140 [2023-12-02 17:27:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:54,049 INFO L225 Difference]: With dead ends: 57217 [2023-12-02 17:27:54,049 INFO L226 Difference]: Without dead ends: 35097 [2023-12-02 17:27:54,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 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 17:27:54,075 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 88 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:54,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 176 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:27:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35097 states. [2023-12-02 17:27:56,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35097 to 34829. [2023-12-02 17:27:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34829 states, 29832 states have (on average 1.2530839367122553) internal successors, (37382), 29888 states have internal predecessors, (37382), 2771 states have call successors, (2771), 2225 states have call predecessors, (2771), 2225 states have return successors, (2943), 2716 states have call predecessors, (2943), 2771 states have call successors, (2943) [2023-12-02 17:27:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34829 states to 34829 states and 43096 transitions. [2023-12-02 17:27:56,668 INFO L78 Accepts]: Start accepts. Automaton has 34829 states and 43096 transitions. Word has length 140 [2023-12-02 17:27:56,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:56,669 INFO L495 AbstractCegarLoop]: Abstraction has 34829 states and 43096 transitions. [2023-12-02 17:27:56,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:27:56,669 INFO L276 IsEmpty]: Start isEmpty. Operand 34829 states and 43096 transitions. [2023-12-02 17:27:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 17:27:56,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:56,693 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1] [2023-12-02 17:27:56,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 17:27:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:56,894 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:56,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash -895587698, now seen corresponding path program 1 times [2023-12-02 17:27:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:56,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017338507] [2023-12-02 17:27:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:27:57,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:57,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017338507] [2023-12-02 17:27:57,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017338507] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:27:57,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413528045] [2023-12-02 17:27:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:57,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:57,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:57,125 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:57,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 17:27:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:57,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:27:57,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:27:57,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:27:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 17:27:57,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413528045] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:27:57,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607321871] [2023-12-02 17:27:57,914 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2023-12-02 17:27:57,914 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:27:57,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:27:57,914 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:27:57,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:28:06,114 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 66 for LOIs [2023-12-02 17:28:06,148 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 66 for LOIs [2023-12-02 17:28:06,201 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 131 for LOIs [2023-12-02 17:28:06,326 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:28:06,558 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 66 for LOIs [2023-12-02 17:28:07,920 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 162 for LOIs [2023-12-02 17:28:08,138 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:28:24,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [607321871] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:28:24,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:28:24,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [8, 8, 6] total 70 [2023-12-02 17:28:24,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063555601] [2023-12-02 17:28:24,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:28:24,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-02 17:28:24,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:28:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-02 17:28:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=4320, Unknown=0, NotChecked=0, Total=4830 [2023-12-02 17:28:24,612 INFO L87 Difference]: Start difference. First operand 34829 states and 43096 transitions. Second operand has 56 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:28:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:28:59,748 INFO L93 Difference]: Finished difference Result 68059 states and 84289 transitions. [2023-12-02 17:28:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-12-02 17:28:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 136 [2023-12-02 17:28:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:28:59,800 INFO L225 Difference]: With dead ends: 68059 [2023-12-02 17:28:59,800 INFO L226 Difference]: Without dead ends: 34875 [2023-12-02 17:28:59,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 335 SyntacticMatches, 15 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10677 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=2107, Invalid=25949, Unknown=0, NotChecked=0, Total=28056 [2023-12-02 17:28:59,835 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 343 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 8078 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 2632 SdHoareTripleChecker+Invalid, 8193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 8078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:28:59,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 2632 Invalid, 8193 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [115 Valid, 8078 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-12-02 17:28:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34875 states. [2023-12-02 17:29:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34875 to 34774. [2023-12-02 17:29:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34774 states, 29781 states have (on average 1.2529465095194923) internal successors, (37314), 29837 states have internal predecessors, (37314), 2769 states have call successors, (2769), 2223 states have call predecessors, (2769), 2223 states have return successors, (2941), 2714 states have call predecessors, (2941), 2769 states have call successors, (2941) [2023-12-02 17:29:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34774 states to 34774 states and 43024 transitions. [2023-12-02 17:29:02,372 INFO L78 Accepts]: Start accepts. Automaton has 34774 states and 43024 transitions. Word has length 136 [2023-12-02 17:29:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:02,372 INFO L495 AbstractCegarLoop]: Abstraction has 34774 states and 43024 transitions. [2023-12-02 17:29:02,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:29:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 34774 states and 43024 transitions. [2023-12-02 17:29:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-02 17:29:02,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:02,400 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:02,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 17:29:02,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:29:02,601 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:02,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1885365898, now seen corresponding path program 1 times [2023-12-02 17:29:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:02,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262783514] [2023-12-02 17:29:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:02,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:29:02,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:02,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262783514] [2023-12-02 17:29:02,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262783514] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:29:02,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924743864] [2023-12-02 17:29:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:02,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:29:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:29:02,851 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:29:02,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 17:29:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:03,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 17:29:03,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:29:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:03,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:29:03,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924743864] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:03,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:29:03,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 17:29:03,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039039130] [2023-12-02 17:29:03,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:03,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:29:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:03,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:29:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:29:03,083 INFO L87 Difference]: Start difference. First operand 34774 states and 43024 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 17:29:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:06,475 INFO L93 Difference]: Finished difference Result 68392 states and 85108 transitions. [2023-12-02 17:29:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:29:06,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 142 [2023-12-02 17:29:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:06,550 INFO L225 Difference]: With dead ends: 68392 [2023-12-02 17:29:06,550 INFO L226 Difference]: Without dead ends: 44082 [2023-12-02 17:29:06,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:29:06,576 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 227 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:06,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 558 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:29:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44082 states. [2023-12-02 17:29:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44082 to 40256. [2023-12-02 17:29:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40256 states, 34277 states have (on average 1.243399364005018) internal successors, (42620), 34297 states have internal predecessors, (42620), 3375 states have call successors, (3375), 2667 states have call predecessors, (3375), 2603 states have return successors, (3637), 3292 states have call predecessors, (3637), 3375 states have call successors, (3637) [2023-12-02 17:29:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40256 states to 40256 states and 49632 transitions. [2023-12-02 17:29:09,758 INFO L78 Accepts]: Start accepts. Automaton has 40256 states and 49632 transitions. Word has length 142 [2023-12-02 17:29:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:09,758 INFO L495 AbstractCegarLoop]: Abstraction has 40256 states and 49632 transitions. [2023-12-02 17:29:09,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 17:29:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 40256 states and 49632 transitions. [2023-12-02 17:29:09,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 17:29:09,783 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:09,783 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:29:09,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 17:29:09,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:29:09,984 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:09,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash 244895498, now seen corresponding path program 1 times [2023-12-02 17:29:09,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:09,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960019772] [2023-12-02 17:29:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:29:10,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:10,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960019772] [2023-12-02 17:29:10,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960019772] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:29:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962532546] [2023-12-02 17:29:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:10,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:29:10,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:29:10,139 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:29:10,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 17:29:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:10,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:29:10,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:29:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:29:10,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:29:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 17:29:10,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962532546] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:29:10,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932017757] [2023-12-02 17:29:10,941 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-12-02 17:29:10,941 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:29:10,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:29:10,941 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:29:10,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:29:21,352 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 59 for LOIs [2023-12-02 17:29:21,386 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 114 for LOIs [2023-12-02 17:29:21,576 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 121 for LOIs [2023-12-02 17:29:21,690 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:29:21,979 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 65 for LOIs [2023-12-02 17:29:22,183 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 152 for LOIs [2023-12-02 17:29:22,397 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:29:35,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1932017757] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:35,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:29:35,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [8, 8, 6] total 71 [2023-12-02 17:29:35,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459452535] [2023-12-02 17:29:35,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:35,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 17:29:35,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:35,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 17:29:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=4416, Unknown=0, NotChecked=0, Total=4970 [2023-12-02 17:29:35,109 INFO L87 Difference]: Start difference. First operand 40256 states and 49632 transitions. Second operand has 57 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 46 states have internal predecessors, (65), 11 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:29:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:50,804 INFO L93 Difference]: Finished difference Result 64373 states and 79775 transitions. [2023-12-02 17:29:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-02 17:29:50,805 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 46 states have internal predecessors, (65), 11 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 138 [2023-12-02 17:29:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:50,871 INFO L225 Difference]: With dead ends: 64373 [2023-12-02 17:29:50,871 INFO L226 Difference]: Without dead ends: 40353 [2023-12-02 17:29:50,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 351 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4447 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=1160, Invalid=11272, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 17:29:50,901 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 246 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 4198 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 4251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 4198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:50,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 2257 Invalid, 4251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 4198 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 17:29:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40353 states. [2023-12-02 17:29:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40353 to 40291. [2023-12-02 17:29:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40291 states, 34310 states have (on average 1.2433692800932672) internal successors, (42660), 34330 states have internal predecessors, (42660), 3376 states have call successors, (3376), 2668 states have call predecessors, (3376), 2604 states have return successors, (3638), 3293 states have call predecessors, (3638), 3376 states have call successors, (3638) [2023-12-02 17:29:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40291 states to 40291 states and 49674 transitions. [2023-12-02 17:29:53,895 INFO L78 Accepts]: Start accepts. Automaton has 40291 states and 49674 transitions. Word has length 138 [2023-12-02 17:29:53,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:53,895 INFO L495 AbstractCegarLoop]: Abstraction has 40291 states and 49674 transitions. [2023-12-02 17:29:53,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 46 states have internal predecessors, (65), 11 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:29:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 40291 states and 49674 transitions. [2023-12-02 17:29:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 17:29:53,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:53,922 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:29:53,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 17:29:54,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:29:54,123 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:54,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash 43008213, now seen corresponding path program 1 times [2023-12-02 17:29:54,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:54,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831471897] [2023-12-02 17:29:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:29:54,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:54,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831471897] [2023-12-02 17:29:54,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831471897] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:29:54,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187286294] [2023-12-02 17:29:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:54,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:29:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:29:54,340 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:29:54,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 17:29:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:54,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:29:54,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:29:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:29:54,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:29:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 17:29:55,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187286294] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:29:55,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669366267] [2023-12-02 17:29:55,091 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-12-02 17:29:55,091 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:29:55,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:29:55,091 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:29:55,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:30:05,572 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 67 for LOIs [2023-12-02 17:30:05,617 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 118 for LOIs [2023-12-02 17:30:05,810 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 133 for LOIs [2023-12-02 17:30:05,928 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:30:06,222 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 67 for LOIs [2023-12-02 17:30:07,563 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 164 for LOIs [2023-12-02 17:30:07,781 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:30:24,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [669366267] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:24,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:30:24,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [8, 8, 6] total 73 [2023-12-02 17:30:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727287219] [2023-12-02 17:30:24,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:24,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-02 17:30:24,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:24,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-02 17:30:24,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=4725, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 17:30:24,826 INFO L87 Difference]: Start difference. First operand 40291 states and 49674 transitions. Second operand has 59 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:31:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:01,747 INFO L93 Difference]: Finished difference Result 76168 states and 94083 transitions. [2023-12-02 17:31:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-12-02 17:31:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 138 [2023-12-02 17:31:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:01,811 INFO L225 Difference]: With dead ends: 76168 [2023-12-02 17:31:01,811 INFO L226 Difference]: Without dead ends: 41798 [2023-12-02 17:31:01,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 338 SyntacticMatches, 15 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11510 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=2099, Invalid=26971, Unknown=0, NotChecked=0, Total=29070 [2023-12-02 17:31:01,839 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 747 mSDsluCounter, 2795 mSDsCounter, 0 mSdLazyCounter, 8473 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 2961 SdHoareTripleChecker+Invalid, 8682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 8473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:01,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 2961 Invalid, 8682 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [209 Valid, 8473 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-12-02 17:31:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41798 states. [2023-12-02 17:31:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41798 to 41253. [2023-12-02 17:31:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41253 states, 35145 states have (on average 1.2429364063166881) internal successors, (43683), 35170 states have internal predecessors, (43683), 3454 states have call successors, (3454), 2717 states have call predecessors, (3454), 2653 states have return successors, (3716), 3366 states have call predecessors, (3716), 3454 states have call successors, (3716) [2023-12-02 17:31:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41253 states to 41253 states and 50853 transitions. [2023-12-02 17:31:04,974 INFO L78 Accepts]: Start accepts. Automaton has 41253 states and 50853 transitions. Word has length 138 [2023-12-02 17:31:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:04,974 INFO L495 AbstractCegarLoop]: Abstraction has 41253 states and 50853 transitions. [2023-12-02 17:31:04,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:31:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 41253 states and 50853 transitions. [2023-12-02 17:31:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 17:31:04,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:04,999 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:31:05,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 17:31:05,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 17:31:05,200 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:05,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:05,200 INFO L85 PathProgramCache]: Analyzing trace with hash -988115885, now seen corresponding path program 1 times [2023-12-02 17:31:05,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:05,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98478577] [2023-12-02 17:31:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:05,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:31:05,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:05,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98478577] [2023-12-02 17:31:05,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98478577] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:05,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679904474] [2023-12-02 17:31:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:05,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:05,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:05,385 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:05,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 17:31:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:05,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:31:05,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:31:05,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 17:31:06,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679904474] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:06,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1786328626] [2023-12-02 17:31:06,151 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-12-02 17:31:06,151 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:06,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:31:06,152 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:31:06,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:31:17,152 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 59 for LOIs [2023-12-02 17:31:17,182 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 114 for LOIs [2023-12-02 17:31:17,372 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 121 for LOIs [2023-12-02 17:31:17,485 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:31:17,767 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 65 for LOIs [2023-12-02 17:31:17,989 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 152 for LOIs [2023-12-02 17:31:18,269 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:31:31,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1786328626] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:31,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:31,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [8, 8, 6] total 71 [2023-12-02 17:31:31,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888703962] [2023-12-02 17:31:31,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:31,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 17:31:31,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 17:31:31,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=4406, Unknown=0, NotChecked=0, Total=4970 [2023-12-02 17:31:31,198 INFO L87 Difference]: Start difference. First operand 41253 states and 50853 transitions. Second operand has 57 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 46 states have internal predecessors, (65), 11 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:31:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:45,937 INFO L93 Difference]: Finished difference Result 56466 states and 69811 transitions. [2023-12-02 17:31:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-12-02 17:31:45,937 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 46 states have internal predecessors, (65), 11 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 138 [2023-12-02 17:31:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:46,003 INFO L225 Difference]: With dead ends: 56466 [2023-12-02 17:31:46,003 INFO L226 Difference]: Without dead ends: 41315 [2023-12-02 17:31:46,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 351 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4302 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=1127, Invalid=10863, Unknown=0, NotChecked=0, Total=11990 [2023-12-02 17:31:46,027 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 193 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 3359 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 3359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:46,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1956 Invalid, 3408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 3359 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-12-02 17:31:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41315 states. [2023-12-02 17:31:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41315 to 41281. [2023-12-02 17:31:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41281 states, 35171 states have (on average 1.2428989792726963) internal successors, (43714), 35196 states have internal predecessors, (43714), 3455 states have call successors, (3455), 2718 states have call predecessors, (3455), 2654 states have return successors, (3717), 3367 states have call predecessors, (3717), 3455 states have call successors, (3717) [2023-12-02 17:31:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41281 states to 41281 states and 50886 transitions. [2023-12-02 17:31:49,859 INFO L78 Accepts]: Start accepts. Automaton has 41281 states and 50886 transitions. Word has length 138 [2023-12-02 17:31:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:49,860 INFO L495 AbstractCegarLoop]: Abstraction has 41281 states and 50886 transitions. [2023-12-02 17:31:49,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 46 states have internal predecessors, (65), 11 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:31:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 41281 states and 50886 transitions. [2023-12-02 17:31:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 17:31:49,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:49,892 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:31:49,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 17:31:50,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 17:31:50,093 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:50,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash -490010096, now seen corresponding path program 1 times [2023-12-02 17:31:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:50,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119026748] [2023-12-02 17:31:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:31:50,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:50,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119026748] [2023-12-02 17:31:50,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119026748] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:50,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33185335] [2023-12-02 17:31:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:50,241 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:50,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 17:31:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:50,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:31:50,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:31:50,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 17:31:50,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33185335] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:50,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128124896] [2023-12-02 17:31:50,990 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-12-02 17:31:50,990 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:50,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:31:50,990 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:31:50,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:31:58,549 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 154 for LOIs [2023-12-02 17:31:58,744 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 67 for LOIs [2023-12-02 17:31:58,797 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 133 for LOIs [2023-12-02 17:31:58,980 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:31:59,207 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 67 for LOIs [2023-12-02 17:31:59,971 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 164 for LOIs [2023-12-02 17:32:00,188 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:32:13,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1128124896] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:32:13,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:32:13,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [8, 9, 6] total 74 [2023-12-02 17:32:13,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440904098] [2023-12-02 17:32:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:32:13,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-02 17:32:13,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:32:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-02 17:32:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=4919, Unknown=0, NotChecked=0, Total=5402 [2023-12-02 17:32:13,945 INFO L87 Difference]: Start difference. First operand 41281 states and 50886 transitions. Second operand has 59 states, 50 states have (on average 1.3) internal successors, (65), 48 states have internal predecessors, (65), 11 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:32:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:32:59,276 INFO L93 Difference]: Finished difference Result 75397 states and 93055 transitions. [2023-12-02 17:32:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2023-12-02 17:32:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 50 states have (on average 1.3) internal successors, (65), 48 states have internal predecessors, (65), 11 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 139 [2023-12-02 17:32:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:32:59,340 INFO L225 Difference]: With dead ends: 75397 [2023-12-02 17:32:59,341 INFO L226 Difference]: Without dead ends: 41051 [2023-12-02 17:32:59,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 351 SyntacticMatches, 3 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16639 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=2711, Invalid=39931, Unknown=0, NotChecked=0, Total=42642 [2023-12-02 17:32:59,373 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 656 mSDsluCounter, 2382 mSDsCounter, 0 mSdLazyCounter, 7166 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 7267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 7166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:32:59,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 2509 Invalid, 7267 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [101 Valid, 7166 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-12-02 17:32:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41051 states. [2023-12-02 17:33:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41051 to 40886. [2023-12-02 17:33:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40886 states, 34833 states have (on average 1.2433037636723796) internal successors, (43308), 34855 states have internal predecessors, (43308), 3421 states have call successors, (3421), 2695 states have call predecessors, (3421), 2631 states have return successors, (3683), 3336 states have call predecessors, (3683), 3421 states have call successors, (3683) [2023-12-02 17:33:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40886 states to 40886 states and 50412 transitions. [2023-12-02 17:33:02,541 INFO L78 Accepts]: Start accepts. Automaton has 40886 states and 50412 transitions. Word has length 139 [2023-12-02 17:33:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:02,541 INFO L495 AbstractCegarLoop]: Abstraction has 40886 states and 50412 transitions. [2023-12-02 17:33:02,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 50 states have (on average 1.3) internal successors, (65), 48 states have internal predecessors, (65), 11 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:33:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 40886 states and 50412 transitions. [2023-12-02 17:33:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 17:33:02,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:02,570 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 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 17:33:02,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 17:33:02,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 17:33:02,770 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:02,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:02,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1251489263, now seen corresponding path program 1 times [2023-12-02 17:33:02,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:02,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800161341] [2023-12-02 17:33:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:02,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:33:02,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:02,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800161341] [2023-12-02 17:33:02,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800161341] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:02,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730991915] [2023-12-02 17:33:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:02,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:02,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:02,943 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:02,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 17:33:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:03,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:33:03,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 64 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:33:03,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-02 17:33:03,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730991915] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:03,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037408795] [2023-12-02 17:33:03,740 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2023-12-02 17:33:03,740 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:33:03,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:33:03,740 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:33:03,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:33:15,011 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 68 for LOIs [2023-12-02 17:33:15,050 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 129 for LOIs [2023-12-02 17:33:15,272 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 135 for LOIs [2023-12-02 17:33:15,390 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:33:15,675 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 68 for LOIs [2023-12-02 17:33:16,872 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 166 for LOIs [2023-12-02 17:33:17,090 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:33:35,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1037408795] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:35,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:33:35,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [8, 8, 6] total 76 [2023-12-02 17:33:35,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440773790] [2023-12-02 17:33:35,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:35,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 17:33:35,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 17:33:35,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=5160, Unknown=0, NotChecked=0, Total=5700 [2023-12-02 17:33:35,202 INFO L87 Difference]: Start difference. First operand 40886 states and 50412 transitions. Second operand has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:34:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:34:25,813 INFO L93 Difference]: Finished difference Result 78076 states and 96501 transitions. [2023-12-02 17:34:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2023-12-02 17:34:25,813 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 140 [2023-12-02 17:34:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:34:25,881 INFO L225 Difference]: With dead ends: 78076 [2023-12-02 17:34:25,881 INFO L226 Difference]: Without dead ends: 45110 [2023-12-02 17:34:25,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 344 SyntacticMatches, 12 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16217 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=2711, Invalid=38701, Unknown=0, NotChecked=0, Total=41412 [2023-12-02 17:34:25,916 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 1041 mSDsluCounter, 3225 mSDsCounter, 0 mSdLazyCounter, 10096 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 3391 SdHoareTripleChecker+Invalid, 10350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 10096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:34:25,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 3391 Invalid, 10350 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [254 Valid, 10096 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2023-12-02 17:34:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45110 states. [2023-12-02 17:34:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45110 to 43585. [2023-12-02 17:34:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43585 states, 37190 states have (on average 1.2428340951868782) internal successors, (46221), 37219 states have internal predecessors, (46221), 3627 states have call successors, (3627), 2831 states have call predecessors, (3627), 2767 states have return successors, (3889), 3535 states have call predecessors, (3889), 3627 states have call successors, (3889) [2023-12-02 17:34:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43585 states to 43585 states and 53737 transitions. [2023-12-02 17:34:29,608 INFO L78 Accepts]: Start accepts. Automaton has 43585 states and 53737 transitions. Word has length 140 [2023-12-02 17:34:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:34:29,608 INFO L495 AbstractCegarLoop]: Abstraction has 43585 states and 53737 transitions. [2023-12-02 17:34:29,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:34:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 43585 states and 53737 transitions. [2023-12-02 17:34:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 17:34:29,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:34:29,635 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 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 17:34:29,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 17:34:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 17:34:29,835 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:34:29,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:34:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2012353935, now seen corresponding path program 1 times [2023-12-02 17:34:29,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:34:29,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895935865] [2023-12-02 17:34:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:34:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:34:30,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:34:30,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895935865] [2023-12-02 17:34:30,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895935865] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:34:30,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143140689] [2023-12-02 17:34:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:30,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:30,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:34:30,026 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:34:30,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 17:34:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:30,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:34:30,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:34:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 64 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:34:30,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:34:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-02 17:34:30,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143140689] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:34:30,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670470601] [2023-12-02 17:34:30,797 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2023-12-02 17:34:30,797 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:34:30,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:34:30,798 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:34:30,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:34:41,867 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 68 for LOIs [2023-12-02 17:34:41,903 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 129 for LOIs [2023-12-02 17:34:42,103 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 135 for LOIs [2023-12-02 17:34:42,220 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:34:42,519 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 68 for LOIs [2023-12-02 17:34:43,704 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 166 for LOIs [2023-12-02 17:34:43,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:35:01,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [670470601] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:35:01,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:35:01,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [8, 8, 6] total 76 [2023-12-02 17:35:01,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556178513] [2023-12-02 17:35:01,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:35:01,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 17:35:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:35:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 17:35:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=5156, Unknown=0, NotChecked=0, Total=5700 [2023-12-02 17:35:01,886 INFO L87 Difference]: Start difference. First operand 43585 states and 53737 transitions. Second operand has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:35:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:35:46,339 INFO L93 Difference]: Finished difference Result 85045 states and 105039 transitions. [2023-12-02 17:35:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-12-02 17:35:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 140 [2023-12-02 17:35:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:35:46,415 INFO L225 Difference]: With dead ends: 85045 [2023-12-02 17:35:46,415 INFO L226 Difference]: Without dead ends: 48327 [2023-12-02 17:35:46,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 344 SyntacticMatches, 10 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13581 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=2395, Invalid=33137, Unknown=0, NotChecked=0, Total=35532 [2023-12-02 17:35:46,448 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1202 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 8319 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 2717 SdHoareTripleChecker+Invalid, 8583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 8319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:35:46,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 2717 Invalid, 8583 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [264 Valid, 8319 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2023-12-02 17:35:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48327 states. [2023-12-02 17:35:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48327 to 46873. [2023-12-02 17:35:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46873 states, 40031 states have (on average 1.2386900152381903) internal successors, (49586), 40065 states have internal predecessors, (49586), 3898 states have call successors, (3898), 3013 states have call predecessors, (3898), 2943 states have return successors, (4178), 3795 states have call predecessors, (4178), 3898 states have call successors, (4178) [2023-12-02 17:35:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46873 states to 46873 states and 57662 transitions. [2023-12-02 17:35:50,722 INFO L78 Accepts]: Start accepts. Automaton has 46873 states and 57662 transitions. Word has length 140 [2023-12-02 17:35:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:35:50,722 INFO L495 AbstractCegarLoop]: Abstraction has 46873 states and 57662 transitions. [2023-12-02 17:35:50,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:35:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 46873 states and 57662 transitions. [2023-12-02 17:35:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 17:35:50,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:35:50,751 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 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 17:35:50,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 17:35:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 17:35:50,952 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:35:50,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:35:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1076743910, now seen corresponding path program 1 times [2023-12-02 17:35:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:35:50,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414898134] [2023-12-02 17:35:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:35:50,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:35:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:35:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:35:51,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:35:51,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414898134] [2023-12-02 17:35:51,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414898134] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:35:51,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109328338] [2023-12-02 17:35:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:35:51,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:35:51,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:35:51,127 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:35:51,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 17:35:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:35:51,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:35:51,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:35:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 64 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:35:51,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:35:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-02 17:35:51,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109328338] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:35:51,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840261269] [2023-12-02 17:35:51,906 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2023-12-02 17:35:51,906 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:35:51,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:35:51,906 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:35:51,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:36:00,244 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 68 for LOIs [2023-12-02 17:36:00,279 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 68 for LOIs [2023-12-02 17:36:00,333 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 135 for LOIs [2023-12-02 17:36:00,453 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:36:00,687 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 68 for LOIs [2023-12-02 17:36:02,133 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 166 for LOIs [2023-12-02 17:36:02,351 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:36:19,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1840261269] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:19,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:36:19,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [8, 8, 6] total 75 [2023-12-02 17:36:19,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605160357] [2023-12-02 17:36:19,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:19,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 17:36:19,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 17:36:19,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=5023, Unknown=0, NotChecked=0, Total=5550 [2023-12-02 17:36:19,140 INFO L87 Difference]: Start difference. First operand 46873 states and 57662 transitions. Second operand has 61 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-12-02 17:37:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:04,330 INFO L93 Difference]: Finished difference Result 87975 states and 108502 transitions. [2023-12-02 17:37:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2023-12-02 17:37:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) Word has length 140 [2023-12-02 17:37:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:04,406 INFO L225 Difference]: With dead ends: 87975 [2023-12-02 17:37:04,406 INFO L226 Difference]: Without dead ends: 46287 [2023-12-02 17:37:04,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 347 SyntacticMatches, 7 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12587 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=2270, Invalid=32512, Unknown=0, NotChecked=0, Total=34782 [2023-12-02 17:37:04,447 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 549 mSDsluCounter, 3137 mSDsCounter, 0 mSdLazyCounter, 9951 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 10096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 9951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:04,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 3284 Invalid, 10096 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [145 Valid, 9951 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-12-02 17:37:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46287 states. [2023-12-02 17:37:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46287 to 45592. [2023-12-02 17:37:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45592 states, 38909 states have (on average 1.239558970932175) internal successors, (48230), 38935 states have internal predecessors, (48230), 3811 states have call successors, (3811), 2942 states have call predecessors, (3811), 2871 states have return successors, (4092), 3715 states have call predecessors, (4092), 3811 states have call successors, (4092) [2023-12-02 17:37:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45592 states to 45592 states and 56133 transitions. [2023-12-02 17:37:08,964 INFO L78 Accepts]: Start accepts. Automaton has 45592 states and 56133 transitions. Word has length 140 [2023-12-02 17:37:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:08,965 INFO L495 AbstractCegarLoop]: Abstraction has 45592 states and 56133 transitions. [2023-12-02 17:37:08,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-12-02 17:37:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 45592 states and 56133 transitions. [2023-12-02 17:37:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 17:37:08,995 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:08,996 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:37:09,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-02 17:37:09,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 17:37:09,196 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:09,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1519641138, now seen corresponding path program 1 times [2023-12-02 17:37:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:09,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45006722] [2023-12-02 17:37:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:37:09,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45006722] [2023-12-02 17:37:09,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45006722] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:37:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464216705] [2023-12-02 17:37:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:09,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:37:09,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:37:09,371 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:37:09,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 17:37:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:09,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 17:37:09,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:37:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:37:09,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:37:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 17:37:10,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464216705] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:37:10,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784862034] [2023-12-02 17:37:10,231 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2023-12-02 17:37:10,231 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:37:10,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:37:10,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:37:10,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:37:19,678 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 68 for LOIs [2023-12-02 17:37:19,712 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 68 for LOIs [2023-12-02 17:37:19,766 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 135 for LOIs [2023-12-02 17:37:19,884 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:37:20,114 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 68 for LOIs [2023-12-02 17:37:21,639 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 166 for LOIs [2023-12-02 17:37:21,857 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:37:40,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1784862034] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:40,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:37:40,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [8, 10, 6] total 78 [2023-12-02 17:37:40,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119532412] [2023-12-02 17:37:40,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:40,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 17:37:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 17:37:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=5505, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 17:37:40,040 INFO L87 Difference]: Start difference. First operand 45592 states and 56133 transitions. Second operand has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:38:26,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:38:26,252 INFO L93 Difference]: Finished difference Result 79833 states and 98547 transitions. [2023-12-02 17:38:26,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2023-12-02 17:38:26,253 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 141 [2023-12-02 17:38:26,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:38:26,323 INFO L225 Difference]: With dead ends: 79833 [2023-12-02 17:38:26,323 INFO L226 Difference]: Without dead ends: 45547 [2023-12-02 17:38:26,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 348 SyntacticMatches, 8 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15952 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=2548, Invalid=38864, Unknown=0, NotChecked=0, Total=41412 [2023-12-02 17:38:26,356 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 696 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 8136 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 8290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 8136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:38:26,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 2270 Invalid, 8290 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [154 Valid, 8136 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-12-02 17:38:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45547 states. [2023-12-02 17:38:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45547 to 44999. [2023-12-02 17:38:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44999 states, 38395 states have (on average 1.2398228936059383) internal successors, (47603), 38417 states have internal predecessors, (47603), 3766 states have call successors, (3766), 2908 states have call predecessors, (3766), 2837 states have return successors, (4047), 3674 states have call predecessors, (4047), 3766 states have call successors, (4047) [2023-12-02 17:38:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44999 states to 44999 states and 55416 transitions. [2023-12-02 17:38:30,517 INFO L78 Accepts]: Start accepts. Automaton has 44999 states and 55416 transitions. Word has length 141 [2023-12-02 17:38:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:38:30,518 INFO L495 AbstractCegarLoop]: Abstraction has 44999 states and 55416 transitions. [2023-12-02 17:38:30,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 17:38:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 44999 states and 55416 transitions. [2023-12-02 17:38:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 17:38:30,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:38:30,551 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:38:30,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 17:38:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-12-02 17:38:30,752 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:38:30,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:38:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1456826037, now seen corresponding path program 1 times [2023-12-02 17:38:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:38:30,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815327172] [2023-12-02 17:38:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:38:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:38:30,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:38:30,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815327172] [2023-12-02 17:38:30,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815327172] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:38:30,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671719686] [2023-12-02 17:38:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:30,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:38:30,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:38:30,941 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:38:30,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a066d383-69fa-4a49-86d9-a191bae9662d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 17:38:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:31,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:38:31,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:38:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:38:31,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:38:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 17:38:31,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671719686] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:38:31,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155331533] [2023-12-02 17:38:31,832 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2023-12-02 17:38:31,832 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:38:31,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:38:31,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:38:31,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:38:41,414 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 68 for LOIs [2023-12-02 17:38:41,447 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 68 for LOIs [2023-12-02 17:38:41,501 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 135 for LOIs [2023-12-02 17:38:41,619 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 96 for LOIs [2023-12-02 17:38:41,846 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 68 for LOIs [2023-12-02 17:38:43,125 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 166 for LOIs [2023-12-02 17:38:43,342 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:39:00,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [155331533] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:39:00,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:39:00,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [8, 9, 6] total 77 [2023-12-02 17:39:00,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837139316] [2023-12-02 17:39:00,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:39:00,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 17:39:00,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:39:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 17:39:00,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=5351, Unknown=0, NotChecked=0, Total=5852 [2023-12-02 17:39:00,923 INFO L87 Difference]: Start difference. First operand 44999 states and 55416 transitions. Second operand has 62 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13)