./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/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_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/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_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/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 0becd5109c9f10d4cd495bd258560ff3ae7f6a1dd143c8dd06621d725fa7a35e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:26:33,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:26:33,096 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:26:33,101 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:26:33,102 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:26:33,135 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:26:33,136 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:26:33,136 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:26:33,137 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:26:33,138 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:26:33,138 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:26:33,139 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:26:33,139 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:26:33,140 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:26:33,140 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:26:33,141 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:26:33,141 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:26:33,142 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:26:33,142 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:26:33,143 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:26:33,144 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:26:33,145 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:26:33,146 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:26:33,146 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:26:33,147 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:26:33,147 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:26:33,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:26:33,148 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:26:33,148 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:26:33,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:26:33,149 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:26:33,150 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:26:33,150 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:26:33,150 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:26:33,150 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:26:33,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:26:33,151 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:26:33,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:26:33,152 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:26:33,152 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:26:33,152 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:26:33,152 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:26:33,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:26:33,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:26:33,153 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:26:33,153 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:26:33,153 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:26:33,154 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_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0becd5109c9f10d4cd495bd258560ff3ae7f6a1dd143c8dd06621d725fa7a35e [2023-12-02 14:26:33,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:26:33,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:26:33,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:26:33,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:26:33,419 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:26:33,420 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2023-12-02 14:26:36,316 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:26:36,534 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:26:36,535 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2023-12-02 14:26:36,550 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/data/713173809/756a2801bbbe4f2db4be4835dc18b797/FLAGf88823199 [2023-12-02 14:26:36,563 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/data/713173809/756a2801bbbe4f2db4be4835dc18b797 [2023-12-02 14:26:36,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:26:36,568 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:26:36,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:26:36,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:26:36,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:26:36,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:26:36" (1/1) ... [2023-12-02 14:26:36,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@411cd385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:36, skipping insertion in model container [2023-12-02 14:26:36,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:26:36" (1/1) ... [2023-12-02 14:26:36,639 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:26:36,810 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_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[914,927] [2023-12-02 14:26:36,870 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_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[7115,7128] [2023-12-02 14:26:36,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:26:36,953 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:26:36,965 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_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[914,927] [2023-12-02 14:26:36,981 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_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[7115,7128] [2023-12-02 14:26:37,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:26:37,044 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:26:37,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37 WrapperNode [2023-12-02 14:26:37,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:26:37,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:26:37,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:26:37,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:26:37,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,065 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,100 INFO L138 Inliner]: procedures = 65, calls = 75, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 710 [2023-12-02 14:26:37,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:26:37,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:26:37,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:26:37,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:26:37,112 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,117 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,118 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,133 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,147 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,150 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,154 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,160 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:26:37,161 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:26:37,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:26:37,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:26:37,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (1/1) ... [2023-12-02 14:26:37,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:26:37,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:26:37,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:26:37,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:26:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:26:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 14:26:37,254 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 14:26:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 14:26:37,254 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 14:26:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 14:26:37,255 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 14:26:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 14:26:37,255 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 14:26:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 14:26:37,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 14:26:37,256 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 14:26:37,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 14:26:37,256 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 14:26:37,256 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 14:26:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 14:26:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 14:26:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 14:26:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 14:26:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 14:26:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 14:26:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 14:26:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 14:26:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:26:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 14:26:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 14:26:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 14:26:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 14:26:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:26:37,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:26:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 14:26:37,260 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 14:26:37,397 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:26:37,400 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:26:38,152 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:26:38,521 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:26:38,522 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-12-02 14:26:38,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:26:38 BoogieIcfgContainer [2023-12-02 14:26:38,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:26:38,526 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:26:38,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:26:38,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:26:38,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:26:36" (1/3) ... [2023-12-02 14:26:38,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21296c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:26:38, skipping insertion in model container [2023-12-02 14:26:38,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:37" (2/3) ... [2023-12-02 14:26:38,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21296c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:26:38, skipping insertion in model container [2023-12-02 14:26:38,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:26:38" (3/3) ... [2023-12-02 14:26:38,533 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2023-12-02 14:26:38,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:26:38,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 14:26:38,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:26:38,620 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;@15169448, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:26:38,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 14:26:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 201 states, 150 states have (on average 1.4933333333333334) internal successors, (224), 156 states have internal predecessors, (224), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 14:26:38,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 14:26:38,639 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:38,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:26:38,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:26:38,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -292333923, now seen corresponding path program 1 times [2023-12-02 14:26:38,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:38,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049651346] [2023-12-02 14:26:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:38,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:38,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:38,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049651346] [2023-12-02 14:26:38,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049651346] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:38,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:38,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:26:38,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728539881] [2023-12-02 14:26:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:38,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:26:38,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:26:39,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:26:39,024 INFO L87 Difference]: Start difference. First operand has 201 states, 150 states have (on average 1.4933333333333334) internal successors, (224), 156 states have internal predecessors, (224), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 14:26:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:39,424 INFO L93 Difference]: Finished difference Result 453 states and 655 transitions. [2023-12-02 14:26:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:26:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-02 14:26:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:39,440 INFO L225 Difference]: With dead ends: 453 [2023-12-02 14:26:39,440 INFO L226 Difference]: Without dead ends: 256 [2023-12-02 14:26:39,445 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 14:26:39,450 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 340 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:39,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 494 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:26:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-12-02 14:26:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2023-12-02 14:26:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 185 states have (on average 1.3891891891891892) internal successors, (257), 189 states have internal predecessors, (257), 42 states have call successors, (42), 21 states have call predecessors, (42), 20 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-02 14:26:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 339 transitions. [2023-12-02 14:26:39,524 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 339 transitions. Word has length 45 [2023-12-02 14:26:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:39,525 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 339 transitions. [2023-12-02 14:26:39,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 14:26:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 339 transitions. [2023-12-02 14:26:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 14:26:39,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:39,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:26:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:26:39,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:26:39,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash 626640700, now seen corresponding path program 1 times [2023-12-02 14:26:39,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:39,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469575341] [2023-12-02 14:26:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:39,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:39,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469575341] [2023-12-02 14:26:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469575341] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:39,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:39,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:26:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414965636] [2023-12-02 14:26:39,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:26:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:26:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:26:39,677 INFO L87 Difference]: Start difference. First operand 249 states and 339 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 14:26:40,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:40,494 INFO L93 Difference]: Finished difference Result 651 states and 842 transitions. [2023-12-02 14:26:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:26:40,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-02 14:26:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:40,502 INFO L225 Difference]: With dead ends: 651 [2023-12-02 14:26:40,503 INFO L226 Difference]: Without dead ends: 519 [2023-12-02 14:26:40,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:26:40,506 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 730 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:40,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 872 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:26:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-12-02 14:26:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 435. [2023-12-02 14:26:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 317 states have (on average 1.3154574132492114) internal successors, (417), 322 states have internal predecessors, (417), 69 states have call successors, (69), 44 states have call predecessors, (69), 47 states have return successors, (71), 70 states have call predecessors, (71), 67 states have call successors, (71) [2023-12-02 14:26:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 557 transitions. [2023-12-02 14:26:40,564 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 557 transitions. Word has length 45 [2023-12-02 14:26:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:40,564 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 557 transitions. [2023-12-02 14:26:40,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 14:26:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 557 transitions. [2023-12-02 14:26:40,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 14:26:40,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:40,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:26:40,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:26:40,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:26:40,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:40,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1695846703, now seen corresponding path program 1 times [2023-12-02 14:26:40,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:40,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740979425] [2023-12-02 14:26:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:40,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:40,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:40,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740979425] [2023-12-02 14:26:40,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740979425] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:40,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:40,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:26:40,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836213945] [2023-12-02 14:26:40,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:40,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:26:40,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:26:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:26:40,809 INFO L87 Difference]: Start difference. First operand 435 states and 557 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 14:26:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:41,577 INFO L93 Difference]: Finished difference Result 951 states and 1173 transitions. [2023-12-02 14:26:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 14:26:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-12-02 14:26:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:41,583 INFO L225 Difference]: With dead ends: 951 [2023-12-02 14:26:41,583 INFO L226 Difference]: Without dead ends: 649 [2023-12-02 14:26:41,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 14:26:41,587 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 403 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:41,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 837 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:26:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-12-02 14:26:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 614. [2023-12-02 14:26:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 442 states have (on average 1.2873303167420815) internal successors, (569), 448 states have internal predecessors, (569), 96 states have call successors, (96), 67 states have call predecessors, (96), 74 states have return successors, (102), 100 states have call predecessors, (102), 94 states have call successors, (102) [2023-12-02 14:26:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 767 transitions. [2023-12-02 14:26:41,639 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 767 transitions. Word has length 46 [2023-12-02 14:26:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:41,640 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 767 transitions. [2023-12-02 14:26:41,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 14:26:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 767 transitions. [2023-12-02 14:26:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 14:26:41,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:41,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:26:41,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:26:41,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:26:41,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash -348674619, now seen corresponding path program 1 times [2023-12-02 14:26:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:41,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683178786] [2023-12-02 14:26:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:41,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:41,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:41,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683178786] [2023-12-02 14:26:41,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683178786] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:41,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:41,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:26:41,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013403] [2023-12-02 14:26:41,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:41,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:26:41,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:26:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:26:41,697 INFO L87 Difference]: Start difference. First operand 614 states and 767 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:26:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:41,870 INFO L93 Difference]: Finished difference Result 1178 states and 1437 transitions. [2023-12-02 14:26:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:26:41,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-12-02 14:26:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:41,876 INFO L225 Difference]: With dead ends: 1178 [2023-12-02 14:26:41,877 INFO L226 Difference]: Without dead ends: 746 [2023-12-02 14:26:41,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:26:41,880 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 67 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:41,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 447 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:26:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-12-02 14:26:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 641. [2023-12-02 14:26:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 465 states have (on average 1.2774193548387096) internal successors, (594), 471 states have internal predecessors, (594), 98 states have call successors, (98), 69 states have call predecessors, (98), 76 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2023-12-02 14:26:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 796 transitions. [2023-12-02 14:26:41,944 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 796 transitions. Word has length 47 [2023-12-02 14:26:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:41,945 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 796 transitions. [2023-12-02 14:26:41,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:26:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 796 transitions. [2023-12-02 14:26:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 14:26:41,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:41,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:26:41,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:26:41,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:26:41,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1065074707, now seen corresponding path program 1 times [2023-12-02 14:26:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:41,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619700230] [2023-12-02 14:26:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:41,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:42,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:42,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619700230] [2023-12-02 14:26:42,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619700230] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:42,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:42,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:26:42,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135170205] [2023-12-02 14:26:42,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:42,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:26:42,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:26:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:26:42,068 INFO L87 Difference]: Start difference. First operand 641 states and 796 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:26:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:42,788 INFO L93 Difference]: Finished difference Result 1224 states and 1708 transitions. [2023-12-02 14:26:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:26:42,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-12-02 14:26:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:42,797 INFO L225 Difference]: With dead ends: 1224 [2023-12-02 14:26:42,797 INFO L226 Difference]: Without dead ends: 1102 [2023-12-02 14:26:42,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:26:42,800 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 924 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:42,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 880 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:26:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2023-12-02 14:26:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1091. [2023-12-02 14:26:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 830 states have (on average 1.3493975903614457) internal successors, (1120), 839 states have internal predecessors, (1120), 159 states have call successors, (159), 93 states have call predecessors, (159), 100 states have return successors, (203), 160 states have call predecessors, (203), 157 states have call successors, (203) [2023-12-02 14:26:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1482 transitions. [2023-12-02 14:26:42,923 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1482 transitions. Word has length 49 [2023-12-02 14:26:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:42,924 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1482 transitions. [2023-12-02 14:26:42,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:26:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1482 transitions. [2023-12-02 14:26:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 14:26:42,927 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:42,927 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:26:42,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:26:42,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:26:42,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:42,928 INFO L85 PathProgramCache]: Analyzing trace with hash -668069985, now seen corresponding path program 1 times [2023-12-02 14:26:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:42,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886191175] [2023-12-02 14:26:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:42,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:26:42,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:42,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886191175] [2023-12-02 14:26:42,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886191175] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:42,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:42,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:26:42,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19254207] [2023-12-02 14:26:42,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:42,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:26:42,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:42,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:26:42,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:26:42,984 INFO L87 Difference]: Start difference. First operand 1091 states and 1482 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:26:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:43,137 INFO L93 Difference]: Finished difference Result 1281 states and 1703 transitions. [2023-12-02 14:26:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:26:43,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-12-02 14:26:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:43,144 INFO L225 Difference]: With dead ends: 1281 [2023-12-02 14:26:43,144 INFO L226 Difference]: Without dead ends: 1008 [2023-12-02 14:26:43,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:26:43,147 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 245 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:43,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 302 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:26:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2023-12-02 14:26:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 899. [2023-12-02 14:26:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 690 states have (on average 1.3594202898550725) internal successors, (938), 697 states have internal predecessors, (938), 135 states have call successors, (135), 73 states have call predecessors, (135), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2023-12-02 14:26:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1244 transitions. [2023-12-02 14:26:43,204 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1244 transitions. Word has length 53 [2023-12-02 14:26:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:43,205 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1244 transitions. [2023-12-02 14:26:43,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:26:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1244 transitions. [2023-12-02 14:26:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 14:26:43,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:43,206 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:26:43,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:26:43,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:26:43,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash 479010543, now seen corresponding path program 1 times [2023-12-02 14:26:43,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:43,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140845649] [2023-12-02 14:26:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:43,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:43,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:43,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140845649] [2023-12-02 14:26:43,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140845649] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:43,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:43,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:26:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875224086] [2023-12-02 14:26:43,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:26:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:26:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:26:43,273 INFO L87 Difference]: Start difference. First operand 899 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 14:26:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:43,562 INFO L93 Difference]: Finished difference Result 1002 states and 1360 transitions. [2023-12-02 14:26:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:26:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-12-02 14:26:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:43,568 INFO L225 Difference]: With dead ends: 1002 [2023-12-02 14:26:43,568 INFO L226 Difference]: Without dead ends: 999 [2023-12-02 14:26:43,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:26:43,570 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 451 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:43,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 273 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:26:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-12-02 14:26:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 898. [2023-12-02 14:26:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 690 states have (on average 1.355072463768116) internal successors, (935), 696 states have internal predecessors, (935), 134 states have call successors, (134), 73 states have call predecessors, (134), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2023-12-02 14:26:43,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1240 transitions. [2023-12-02 14:26:43,629 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1240 transitions. Word has length 54 [2023-12-02 14:26:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:43,629 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1240 transitions. [2023-12-02 14:26:43,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 14:26:43,630 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1240 transitions. [2023-12-02 14:26:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 14:26:43,631 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:43,631 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:26:43,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 14:26:43,632 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:26:43,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1963424686, now seen corresponding path program 1 times [2023-12-02 14:26:43,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:43,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158648779] [2023-12-02 14:26:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:43,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:43,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158648779] [2023-12-02 14:26:43,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158648779] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:26:43,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422034594] [2023-12-02 14:26:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:43,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:26:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:26:43,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:26:43,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:26:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:43,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:26:43,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:26:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:44,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:26:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422034594] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:26:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945654350] [2023-12-02 14:26:44,244 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 14:26:44,245 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:26:44,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:26:44,256 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:26:44,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:26:48,822 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 151 for LOIs [2023-12-02 14:26:48,877 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 147 for LOIs [2023-12-02 14:26:48,933 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 155 for LOIs [2023-12-02 14:26:49,678 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 151 for LOIs [2023-12-02 14:26:49,828 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 151 for LOIs [2023-12-02 14:26:49,985 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 151 for LOIs [2023-12-02 14:26:50,040 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 158 for LOIs [2023-12-02 14:26:50,095 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:27:04,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1945654350] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:04,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:27:04,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-12-02 14:27:04,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757045134] [2023-12-02 14:27:04,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:04,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 14:27:04,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:04,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 14:27:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 14:27:04,096 INFO L87 Difference]: Start difference. First operand 898 states and 1240 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 14:27:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:24,048 INFO L93 Difference]: Finished difference Result 1262 states and 1651 transitions. [2023-12-02 14:27:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 14:27:24,049 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-12-02 14:27:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:24,053 INFO L225 Difference]: With dead ends: 1262 [2023-12-02 14:27:24,053 INFO L226 Difference]: Without dead ends: 947 [2023-12-02 14:27:24,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 14:27:24,056 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 141 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 4238 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2124 SdHoareTripleChecker+Invalid, 4373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 4238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:24,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 2124 Invalid, 4373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 4238 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-12-02 14:27:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-12-02 14:27:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 932. [2023-12-02 14:27:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 716 states have (on average 1.344972067039106) internal successors, (963), 722 states have internal predecessors, (963), 136 states have call successors, (136), 79 states have call predecessors, (136), 78 states have return successors, (173), 132 states have call predecessors, (173), 135 states have call successors, (173) [2023-12-02 14:27:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1272 transitions. [2023-12-02 14:27:24,142 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1272 transitions. Word has length 55 [2023-12-02 14:27:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:24,142 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1272 transitions. [2023-12-02 14:27:24,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 14:27:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1272 transitions. [2023-12-02 14:27:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 14:27:24,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:24,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:27:24,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:27:24,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:27:24,344 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:27:24,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:24,345 INFO L85 PathProgramCache]: Analyzing trace with hash -544268247, now seen corresponding path program 1 times [2023-12-02 14:27:24,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:24,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104440853] [2023-12-02 14:27:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:24,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:27:24,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:24,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104440853] [2023-12-02 14:27:24,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104440853] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:24,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:27:24,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:27:24,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474563555] [2023-12-02 14:27:24,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:24,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:27:24,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:27:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:27:24,394 INFO L87 Difference]: Start difference. First operand 932 states and 1272 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:27:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:24,582 INFO L93 Difference]: Finished difference Result 1213 states and 1594 transitions. [2023-12-02 14:27:24,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:27:24,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-12-02 14:27:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:24,590 INFO L225 Difference]: With dead ends: 1213 [2023-12-02 14:27:24,590 INFO L226 Difference]: Without dead ends: 1044 [2023-12-02 14:27:24,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:27:24,591 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 42 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:24,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 493 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:27:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2023-12-02 14:27:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 967. [2023-12-02 14:27:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 745 states have (on average 1.3409395973154363) internal successors, (999), 751 states have internal predecessors, (999), 139 states have call successors, (139), 82 states have call predecessors, (139), 81 states have return successors, (176), 135 states have call predecessors, (176), 138 states have call successors, (176) [2023-12-02 14:27:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1314 transitions. [2023-12-02 14:27:24,685 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1314 transitions. Word has length 61 [2023-12-02 14:27:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:24,685 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1314 transitions. [2023-12-02 14:27:24,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:27:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1314 transitions. [2023-12-02 14:27:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 14:27:24,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:24,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:27:24,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 14:27:24,687 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:27:24,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:24,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2011765625, now seen corresponding path program 1 times [2023-12-02 14:27:24,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:24,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648393672] [2023-12-02 14:27:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:24,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:27:24,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:24,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648393672] [2023-12-02 14:27:24,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648393672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:24,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:27:24,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:27:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974049276] [2023-12-02 14:27:24,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:24,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:27:24,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:27:24,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:27:24,829 INFO L87 Difference]: Start difference. First operand 967 states and 1314 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:27:25,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:25,582 INFO L93 Difference]: Finished difference Result 1430 states and 1840 transitions. [2023-12-02 14:27:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 14:27:25,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2023-12-02 14:27:25,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:25,589 INFO L225 Difference]: With dead ends: 1430 [2023-12-02 14:27:25,590 INFO L226 Difference]: Without dead ends: 1127 [2023-12-02 14:27:25,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 14:27:25,591 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 387 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:25,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 790 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:27:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-12-02 14:27:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1106. [2023-12-02 14:27:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 839 states have (on average 1.3134684147794995) internal successors, (1102), 845 states have internal predecessors, (1102), 163 states have call successors, (163), 103 states have call predecessors, (163), 102 states have return successors, (200), 159 states have call predecessors, (200), 162 states have call successors, (200) [2023-12-02 14:27:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1465 transitions. [2023-12-02 14:27:25,780 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1465 transitions. Word has length 63 [2023-12-02 14:27:25,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:25,781 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1465 transitions. [2023-12-02 14:27:25,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:27:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1465 transitions. [2023-12-02 14:27:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 14:27:25,783 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:25,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:27:25,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 14:27:25,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:27:25,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash -200613086, now seen corresponding path program 1 times [2023-12-02 14:27:25,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:25,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910000544] [2023-12-02 14:27:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:25,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:27:25,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:25,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910000544] [2023-12-02 14:27:25,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910000544] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:27:25,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824282887] [2023-12-02 14:27:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:25,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:27:25,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:27:25,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:27:25,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:27:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:26,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:27:26,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:27:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:27:26,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:27:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:27:26,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824282887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:27:26,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414185288] [2023-12-02 14:27:26,347 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 14:27:26,347 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:27:26,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:27:26,348 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:27:26,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:27:35,428 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 151 for LOIs [2023-12-02 14:27:35,489 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 150 for LOIs [2023-12-02 14:27:35,776 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 106 for LOIs [2023-12-02 14:27:35,816 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 155 for LOIs [2023-12-02 14:27:36,571 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 151 for LOIs [2023-12-02 14:27:36,832 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 151 for LOIs [2023-12-02 14:27:36,988 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 151 for LOIs [2023-12-02 14:27:37,046 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 158 for LOIs [2023-12-02 14:27:37,107 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:27:54,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25287#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_32| Int) (v_~c_last_read~0_10 Int) (v_~q_free~0_43 Int)) (and (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_3|) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~t1_pc~0 0) (not (= v_~q_free~0_43 1)) (= ~T4_E~0 2) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_3| 1) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_3| 0)) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (<= v_~q_free~0_43 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= |v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_32| 1) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (= ~t1_i~0 0))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_7| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_7| 2147483647) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_7| 0)) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_7| 2147483648)))) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2023-12-02 14:27:54,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:27:54,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:27:54,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 14:27:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123507372] [2023-12-02 14:27:54,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:27:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:27:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:27:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 14:27:54,186 INFO L87 Difference]: Start difference. First operand 1106 states and 1465 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 14:27:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:54,770 INFO L93 Difference]: Finished difference Result 2200 states and 2706 transitions. [2023-12-02 14:27:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:27:54,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2023-12-02 14:27:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:54,782 INFO L225 Difference]: With dead ends: 2200 [2023-12-02 14:27:54,782 INFO L226 Difference]: Without dead ends: 2197 [2023-12-02 14:27:54,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 14:27:54,784 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 635 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:54,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 981 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:27:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2023-12-02 14:27:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1620. [2023-12-02 14:27:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1195 states have (on average 1.2728033472803346) internal successors, (1521), 1201 states have internal predecessors, (1521), 247 states have call successors, (247), 177 states have call predecessors, (247), 176 states have return successors, (284), 243 states have call predecessors, (284), 246 states have call successors, (284) [2023-12-02 14:27:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2052 transitions. [2023-12-02 14:27:55,066 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2052 transitions. Word has length 64 [2023-12-02 14:27:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:55,066 INFO L495 AbstractCegarLoop]: Abstraction has 1620 states and 2052 transitions. [2023-12-02 14:27:55,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 14:27:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2052 transitions. [2023-12-02 14:27:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 14:27:55,069 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:55,069 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 14:27:55,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 14:27:55,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 14:27:55,271 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:27:55,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:55,271 INFO L85 PathProgramCache]: Analyzing trace with hash -224399679, now seen corresponding path program 2 times [2023-12-02 14:27:55,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:55,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717686028] [2023-12-02 14:27:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:55,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:27:55,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:55,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717686028] [2023-12-02 14:27:55,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717686028] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:55,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:27:55,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:27:55,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181027352] [2023-12-02 14:27:55,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:55,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:27:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:27:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:27:55,320 INFO L87 Difference]: Start difference. First operand 1620 states and 2052 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:27:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:55,645 INFO L93 Difference]: Finished difference Result 2372 states and 2908 transitions. [2023-12-02 14:27:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:27:55,646 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2023-12-02 14:27:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:55,657 INFO L225 Difference]: With dead ends: 2372 [2023-12-02 14:27:55,657 INFO L226 Difference]: Without dead ends: 1616 [2023-12-02 14:27:55,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:27:55,660 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 248 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:55,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 338 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:27:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2023-12-02 14:27:55,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1605. [2023-12-02 14:27:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1180 states have (on average 1.2635593220338983) internal successors, (1491), 1186 states have internal predecessors, (1491), 247 states have call successors, (247), 177 states have call predecessors, (247), 176 states have return successors, (284), 243 states have call predecessors, (284), 246 states have call successors, (284) [2023-12-02 14:27:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2022 transitions. [2023-12-02 14:27:55,914 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2022 transitions. Word has length 67 [2023-12-02 14:27:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:55,914 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 2022 transitions. [2023-12-02 14:27:55,914 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:27:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2022 transitions. [2023-12-02 14:27:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 14:27:55,917 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:55,917 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 14:27:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 14:27:55,918 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:27:55,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash -890194077, now seen corresponding path program 1 times [2023-12-02 14:27:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:55,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626915021] [2023-12-02 14:27:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:55,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:27:55,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:55,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626915021] [2023-12-02 14:27:55,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626915021] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:55,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:27:55,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:27:55,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717993112] [2023-12-02 14:27:55,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:55,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:27:55,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:27:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:27:55,994 INFO L87 Difference]: Start difference. First operand 1605 states and 2022 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:27:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:56,385 INFO L93 Difference]: Finished difference Result 2571 states and 3116 transitions. [2023-12-02 14:27:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:27:56,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-12-02 14:27:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:56,394 INFO L225 Difference]: With dead ends: 2571 [2023-12-02 14:27:56,394 INFO L226 Difference]: Without dead ends: 1781 [2023-12-02 14:27:56,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:27:56,397 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 37 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:56,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 484 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:27:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2023-12-02 14:27:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1652. [2023-12-02 14:27:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1219 states have (on average 1.2608695652173914) internal successors, (1537), 1225 states have internal predecessors, (1537), 251 states have call successors, (251), 181 states have call predecessors, (251), 180 states have return successors, (288), 247 states have call predecessors, (288), 250 states have call successors, (288) [2023-12-02 14:27:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2076 transitions. [2023-12-02 14:27:56,590 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2076 transitions. Word has length 71 [2023-12-02 14:27:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:56,591 INFO L495 AbstractCegarLoop]: Abstraction has 1652 states and 2076 transitions. [2023-12-02 14:27:56,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:27:56,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2076 transitions. [2023-12-02 14:27:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 14:27:56,594 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:56,594 INFO L195 NwaCegarLoop]: trace histogram [4, 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 14:27:56,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 14:27:56,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:27:56,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2014126877, now seen corresponding path program 1 times [2023-12-02 14:27:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:56,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287488735] [2023-12-02 14:27:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:56,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 14:27:56,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:56,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287488735] [2023-12-02 14:27:56,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287488735] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:27:56,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206893887] [2023-12-02 14:27:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:56,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:27:56,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:27:56,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:27:56,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:27:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:57,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:27:57,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:27:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:27:57,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:27:57,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206893887] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:57,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:27:57,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2023-12-02 14:27:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337607806] [2023-12-02 14:27:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:57,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:27:57,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:27:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:27:57,112 INFO L87 Difference]: Start difference. First operand 1652 states and 2076 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 14:27:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:57,516 INFO L93 Difference]: Finished difference Result 2514 states and 3080 transitions. [2023-12-02 14:27:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:27:57,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-12-02 14:27:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:57,526 INFO L225 Difference]: With dead ends: 2514 [2023-12-02 14:27:57,526 INFO L226 Difference]: Without dead ends: 1467 [2023-12-02 14:27:57,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-12-02 14:27:57,530 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 242 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:57,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 1023 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:27:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2023-12-02 14:27:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1282. [2023-12-02 14:27:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 981 states have (on average 1.290519877675841) internal successors, (1266), 987 states have internal predecessors, (1266), 180 states have call successors, (180), 120 states have call predecessors, (180), 119 states have return successors, (217), 176 states have call predecessors, (217), 179 states have call successors, (217) [2023-12-02 14:27:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1663 transitions. [2023-12-02 14:27:57,714 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1663 transitions. Word has length 102 [2023-12-02 14:27:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:57,715 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1663 transitions. [2023-12-02 14:27:57,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 14:27:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1663 transitions. [2023-12-02 14:27:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 14:27:57,717 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:57,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:27:57,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 14:27:57,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 14:27:57,918 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:27:57,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:57,918 INFO L85 PathProgramCache]: Analyzing trace with hash -581587808, now seen corresponding path program 1 times [2023-12-02 14:27:57,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:57,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604662406] [2023-12-02 14:27:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:57,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:27:58,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604662406] [2023-12-02 14:27:58,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604662406] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:27:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779904228] [2023-12-02 14:27:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:58,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:27:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:27:58,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:27:58,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:27:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:58,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:27:58,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:27:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 14:27:58,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:27:58,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779904228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:58,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:27:58,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:27:58,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156243574] [2023-12-02 14:27:58,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:58,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:27:58,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:58,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:27:58,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:27:58,235 INFO L87 Difference]: Start difference. First operand 1282 states and 1663 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:27:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:58,552 INFO L93 Difference]: Finished difference Result 2410 states and 3435 transitions. [2023-12-02 14:27:58,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:27:58,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-12-02 14:27:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:58,562 INFO L225 Difference]: With dead ends: 2410 [2023-12-02 14:27:58,562 INFO L226 Difference]: Without dead ends: 1838 [2023-12-02 14:27:58,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:27:58,566 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 244 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:58,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 373 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:27:58,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2023-12-02 14:27:58,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1831. [2023-12-02 14:27:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1428 states have (on average 1.3333333333333333) internal successors, (1904), 1437 states have internal predecessors, (1904), 252 states have call successors, (252), 150 states have call predecessors, (252), 149 states have return successors, (323), 245 states have call predecessors, (323), 251 states have call successors, (323) [2023-12-02 14:27:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2479 transitions. [2023-12-02 14:27:58,757 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2479 transitions. Word has length 95 [2023-12-02 14:27:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:58,757 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 2479 transitions. [2023-12-02 14:27:58,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:27:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2479 transitions. [2023-12-02 14:27:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 14:27:58,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:58,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:27:58,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:27:58,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 14:27:58,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:27:58,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2089662400, now seen corresponding path program 1 times [2023-12-02 14:27:58,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:58,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805332735] [2023-12-02 14:27:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:58,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:27:59,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805332735] [2023-12-02 14:27:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805332735] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:27:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799522326] [2023-12-02 14:27:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:59,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:27:59,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:27:59,064 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:27:59,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:27:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:59,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:27:59,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:27:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 14:27:59,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:27:59,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799522326] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:59,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:27:59,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:27:59,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820407338] [2023-12-02 14:27:59,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:59,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:27:59,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:27:59,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:27:59,286 INFO L87 Difference]: Start difference. First operand 1831 states and 2479 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:27:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:59,682 INFO L93 Difference]: Finished difference Result 4042 states and 5921 transitions. [2023-12-02 14:27:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:27:59,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-12-02 14:27:59,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:59,701 INFO L225 Difference]: With dead ends: 4042 [2023-12-02 14:27:59,701 INFO L226 Difference]: Without dead ends: 2921 [2023-12-02 14:27:59,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:27:59,707 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 235 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:59,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 368 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:27:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2023-12-02 14:28:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2909. [2023-12-02 14:28:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2307 states have (on average 1.365409622886866) internal successors, (3150), 2322 states have internal predecessors, (3150), 391 states have call successors, (391), 210 states have call predecessors, (391), 209 states have return successors, (526), 378 states have call predecessors, (526), 390 states have call successors, (526) [2023-12-02 14:28:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 4067 transitions. [2023-12-02 14:28:00,111 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 4067 transitions. Word has length 95 [2023-12-02 14:28:00,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:28:00,112 INFO L495 AbstractCegarLoop]: Abstraction has 2909 states and 4067 transitions. [2023-12-02 14:28:00,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:28:00,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 4067 transitions. [2023-12-02 14:28:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 14:28:00,118 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:28:00,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:28:00,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 14:28:00,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 14:28:00,321 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:28:00,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:28:00,322 INFO L85 PathProgramCache]: Analyzing trace with hash -760829792, now seen corresponding path program 1 times [2023-12-02 14:28:00,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:28:00,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932258746] [2023-12-02 14:28:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:28:00,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:28:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:28:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:28:00,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:28:00,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932258746] [2023-12-02 14:28:00,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932258746] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:28:00,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457257379] [2023-12-02 14:28:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:28:00,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:28:00,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:28:00,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:28:00,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:28:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:28:00,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:28:00,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:28:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 14:28:00,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:28:00,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457257379] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:28:00,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:28:00,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:28:00,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255129824] [2023-12-02 14:28:00,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:28:00,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:28:00,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:28:00,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:28:00,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:28:00,606 INFO L87 Difference]: Start difference. First operand 2909 states and 4067 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:28:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:28:01,035 INFO L93 Difference]: Finished difference Result 7246 states and 10752 transitions. [2023-12-02 14:28:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:28:01,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-12-02 14:28:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:28:01,059 INFO L225 Difference]: With dead ends: 7246 [2023-12-02 14:28:01,059 INFO L226 Difference]: Without dead ends: 5047 [2023-12-02 14:28:01,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:28:01,072 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 241 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:28:01,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 368 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:28:01,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2023-12-02 14:28:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 5025. [2023-12-02 14:28:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 4035 states have (on average 1.3833952912019827) internal successors, (5582), 4062 states have internal predecessors, (5582), 659 states have call successors, (659), 330 states have call predecessors, (659), 329 states have return successors, (914), 634 states have call predecessors, (914), 658 states have call successors, (914) [2023-12-02 14:28:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 7155 transitions. [2023-12-02 14:28:01,634 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 7155 transitions. Word has length 95 [2023-12-02 14:28:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:28:01,634 INFO L495 AbstractCegarLoop]: Abstraction has 5025 states and 7155 transitions. [2023-12-02 14:28:01,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:28:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 7155 transitions. [2023-12-02 14:28:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 14:28:01,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:28:01,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:28:01,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:28:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:28:01,844 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:28:01,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:28:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1472164224, now seen corresponding path program 1 times [2023-12-02 14:28:01,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:28:01,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767015009] [2023-12-02 14:28:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:28:01,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:28:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:28:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 14:28:01,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:28:01,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767015009] [2023-12-02 14:28:01,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767015009] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:28:01,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:28:01,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:28:01,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299653815] [2023-12-02 14:28:01,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:28:01,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:28:01,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:28:01,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:28:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:28:01,936 INFO L87 Difference]: Start difference. First operand 5025 states and 7155 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:28:02,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:28:02,480 INFO L93 Difference]: Finished difference Result 9523 states and 14048 transitions. [2023-12-02 14:28:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:28:02,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-12-02 14:28:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:28:02,519 INFO L225 Difference]: With dead ends: 9523 [2023-12-02 14:28:02,519 INFO L226 Difference]: Without dead ends: 6065 [2023-12-02 14:28:02,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:28:02,533 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 80 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:28:02,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 542 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:28:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2023-12-02 14:28:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5697. [2023-12-02 14:28:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5697 states, 4675 states have (on average 1.411336898395722) internal successors, (6598), 4702 states have internal predecessors, (6598), 675 states have call successors, (675), 346 states have call predecessors, (675), 345 states have return successors, (930), 650 states have call predecessors, (930), 674 states have call successors, (930) [2023-12-02 14:28:03,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5697 states to 5697 states and 8203 transitions. [2023-12-02 14:28:03,026 INFO L78 Accepts]: Start accepts. Automaton has 5697 states and 8203 transitions. Word has length 95 [2023-12-02 14:28:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:28:03,027 INFO L495 AbstractCegarLoop]: Abstraction has 5697 states and 8203 transitions. [2023-12-02 14:28:03,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:28:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5697 states and 8203 transitions. [2023-12-02 14:28:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 14:28:03,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:28:03,038 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:28:03,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 14:28:03,039 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:28:03,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:28:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1566197935, now seen corresponding path program 1 times [2023-12-02 14:28:03,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:28:03,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974056055] [2023-12-02 14:28:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:28:03,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:28:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:28:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 14:28:03,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:28:03,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974056055] [2023-12-02 14:28:03,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974056055] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:28:03,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526107447] [2023-12-02 14:28:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:28:03,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:28:03,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:28:03,241 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:28:03,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:28:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:28:03,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 14:28:03,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:28:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:28:03,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:28:03,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526107447] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:28:03,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:28:03,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 14:28:03,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216139267] [2023-12-02 14:28:03,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:28:03,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:28:03,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:28:03,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:28:03,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 14:28:03,476 INFO L87 Difference]: Start difference. First operand 5697 states and 8203 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 14:28:04,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:28:04,095 INFO L93 Difference]: Finished difference Result 6246 states and 8828 transitions. [2023-12-02 14:28:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:28:04,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2023-12-02 14:28:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:28:04,115 INFO L225 Difference]: With dead ends: 6246 [2023-12-02 14:28:04,115 INFO L226 Difference]: Without dead ends: 5653 [2023-12-02 14:28:04,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:28:04,119 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 62 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:28:04,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1513 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:28:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5653 states. [2023-12-02 14:28:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5653 to 5561. [2023-12-02 14:28:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5561 states, 4575 states have (on average 1.4166120218579235) internal successors, (6481), 4602 states have internal predecessors, (6481), 656 states have call successors, (656), 329 states have call predecessors, (656), 328 states have return successors, (911), 631 states have call predecessors, (911), 655 states have call successors, (911) [2023-12-02 14:28:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5561 states to 5561 states and 8048 transitions. [2023-12-02 14:28:04,525 INFO L78 Accepts]: Start accepts. Automaton has 5561 states and 8048 transitions. Word has length 112 [2023-12-02 14:28:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:28:04,525 INFO L495 AbstractCegarLoop]: Abstraction has 5561 states and 8048 transitions. [2023-12-02 14:28:04,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 14:28:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5561 states and 8048 transitions. [2023-12-02 14:28:04,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 14:28:04,532 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:28:04,532 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:28:04,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:28:04,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:28:04,733 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:28:04,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:28:04,733 INFO L85 PathProgramCache]: Analyzing trace with hash 785873199, now seen corresponding path program 1 times [2023-12-02 14:28:04,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:28:04,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004903820] [2023-12-02 14:28:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:28:04,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:28:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:28:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 14:28:04,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:28:04,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004903820] [2023-12-02 14:28:04,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004903820] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:28:04,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319561452] [2023-12-02 14:28:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:28:04,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:28:04,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:28:04,859 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:28:04,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 14:28:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:28:04,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 14:28:04,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:28:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 14:28:05,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:28:05,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319561452] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:28:05,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:28:05,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-12-02 14:28:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453029995] [2023-12-02 14:28:05,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:28:05,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:28:05,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:28:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:28:05,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:28:05,048 INFO L87 Difference]: Start difference. First operand 5561 states and 8048 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 14:28:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:28:05,627 INFO L93 Difference]: Finished difference Result 6310 states and 8893 transitions. [2023-12-02 14:28:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:28:05,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2023-12-02 14:28:05,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:28:05,644 INFO L225 Difference]: With dead ends: 6310 [2023-12-02 14:28:05,644 INFO L226 Difference]: Without dead ends: 5853 [2023-12-02 14:28:05,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-12-02 14:28:05,646 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 228 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:28:05,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1116 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:28:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2023-12-02 14:28:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 5819. [2023-12-02 14:28:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5819 states, 4737 states have (on average 1.4061642389698121) internal successors, (6661), 4770 states have internal predecessors, (6661), 704 states have call successors, (704), 371 states have call predecessors, (704), 376 states have return successors, (971), 679 states have call predecessors, (971), 703 states have call successors, (971) [2023-12-02 14:28:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 8336 transitions. [2023-12-02 14:28:06,099 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 8336 transitions. Word has length 113 [2023-12-02 14:28:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:28:06,100 INFO L495 AbstractCegarLoop]: Abstraction has 5819 states and 8336 transitions. [2023-12-02 14:28:06,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 14:28:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 8336 transitions. [2023-12-02 14:28:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 14:28:06,108 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:28:06,108 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:28:06,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 14:28:06,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:28:06,310 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:28:06,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:28:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash -674518683, now seen corresponding path program 1 times [2023-12-02 14:28:06,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:28:06,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759003409] [2023-12-02 14:28:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:28:06,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:28:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:28:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 14:28:07,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:28:07,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759003409] [2023-12-02 14:28:07,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759003409] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:28:07,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093124970] [2023-12-02 14:28:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:28:07,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:28:07,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:28:07,338 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:28:07,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 14:28:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:28:07,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 14:28:07,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:28:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:28:08,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:28:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 14:28:09,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093124970] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:28:09,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246923440] [2023-12-02 14:28:09,937 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-12-02 14:28:09,937 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:28:09,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:28:09,938 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:28:09,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:28:40,476 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 14:28:40,478 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2023-12-02 14:28:40,480 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 14:28:40,484 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 164 for LOIs [2023-12-02 14:28:41,502 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 165 for LOIs [2023-12-02 14:28:42,484 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 14:28:42,507 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 158 for LOIs [2023-12-02 14:28:42,687 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 169 for LOIs [2023-12-02 14:28:42,882 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:28:53,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127610#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2023-12-02 14:28:53,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:28:53,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:28:53,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2023-12-02 14:28:53,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934043986] [2023-12-02 14:28:53,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:28:53,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 14:28:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:28:53,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 14:28:53,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=10091, Unknown=0, NotChecked=0, Total=10920 [2023-12-02 14:28:53,971 INFO L87 Difference]: Start difference. First operand 5819 states and 8336 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2023-12-02 14:29:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:10,214 INFO L93 Difference]: Finished difference Result 8688 states and 11825 transitions. [2023-12-02 14:29:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2023-12-02 14:29:10,215 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2023-12-02 14:29:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:10,240 INFO L225 Difference]: With dead ends: 8688 [2023-12-02 14:29:10,241 INFO L226 Difference]: Without dead ends: 7973 [2023-12-02 14:29:10,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 51512 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=11592, Invalid=114078, Unknown=0, NotChecked=0, Total=125670 [2023-12-02 14:29:10,272 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 4216 mSDsluCounter, 3982 mSDsCounter, 0 mSdLazyCounter, 6788 mSolverCounterSat, 1789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4216 SdHoareTripleChecker+Valid, 4218 SdHoareTripleChecker+Invalid, 8577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1789 IncrementalHoareTripleChecker+Valid, 6788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:10,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4216 Valid, 4218 Invalid, 8577 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1789 Valid, 6788 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-02 14:29:10,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2023-12-02 14:29:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 6095. [2023-12-02 14:29:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6095 states, 4921 states have (on average 1.3964641333062386) internal successors, (6872), 4956 states have internal predecessors, (6872), 749 states have call successors, (749), 408 states have call predecessors, (749), 423 states have return successors, (1028), 732 states have call predecessors, (1028), 748 states have call successors, (1028) [2023-12-02 14:29:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6095 states to 6095 states and 8649 transitions. [2023-12-02 14:29:10,972 INFO L78 Accepts]: Start accepts. Automaton has 6095 states and 8649 transitions. Word has length 114 [2023-12-02 14:29:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:29:10,972 INFO L495 AbstractCegarLoop]: Abstraction has 6095 states and 8649 transitions. [2023-12-02 14:29:10,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2023-12-02 14:29:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6095 states and 8649 transitions. [2023-12-02 14:29:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 14:29:10,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:29:10,980 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 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 14:29:10,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 14:29:11,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:29:11,181 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:29:11,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:29:11,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1878270322, now seen corresponding path program 1 times [2023-12-02 14:29:11,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:29:11,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490560209] [2023-12-02 14:29:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:11,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:29:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 14:29:11,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:29:11,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490560209] [2023-12-02 14:29:11,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490560209] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:29:11,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787262826] [2023-12-02 14:29:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:11,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:29:11,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:29:11,519 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:29:11,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 14:29:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:11,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 14:29:11,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:29:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 14:29:11,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:29:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 14:29:11,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787262826] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:29:11,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:29:11,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2023-12-02 14:29:11,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652281553] [2023-12-02 14:29:11,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:29:11,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:29:11,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:29:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:29:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 14:29:11,907 INFO L87 Difference]: Start difference. First operand 6095 states and 8649 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 14:29:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:13,029 INFO L93 Difference]: Finished difference Result 7419 states and 10197 transitions. [2023-12-02 14:29:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:29:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2023-12-02 14:29:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:13,042 INFO L225 Difference]: With dead ends: 7419 [2023-12-02 14:29:13,043 INFO L226 Difference]: Without dead ends: 6428 [2023-12-02 14:29:13,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-12-02 14:29:13,046 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 354 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:13,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 626 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:29:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6428 states. [2023-12-02 14:29:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6428 to 6175. [2023-12-02 14:29:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6175 states, 4966 states have (on average 1.3940797422472815) internal successors, (6923), 5004 states have internal predecessors, (6923), 768 states have call successors, (768), 417 states have call predecessors, (768), 439 states have return successors, (1068), 755 states have call predecessors, (1068), 767 states have call successors, (1068) [2023-12-02 14:29:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6175 states to 6175 states and 8759 transitions. [2023-12-02 14:29:13,636 INFO L78 Accepts]: Start accepts. Automaton has 6175 states and 8759 transitions. Word has length 115 [2023-12-02 14:29:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:29:13,637 INFO L495 AbstractCegarLoop]: Abstraction has 6175 states and 8759 transitions. [2023-12-02 14:29:13,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 14:29:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6175 states and 8759 transitions. [2023-12-02 14:29:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 14:29:13,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:29:13,647 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:29:13,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 14:29:13,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 14:29:13,848 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:29:13,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:29:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1115446576, now seen corresponding path program 1 times [2023-12-02 14:29:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:29:13,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868039205] [2023-12-02 14:29:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:13,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:29:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 14:29:14,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:29:14,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868039205] [2023-12-02 14:29:14,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868039205] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:29:14,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330394712] [2023-12-02 14:29:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:14,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:29:14,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:29:14,663 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:29:14,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 14:29:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:14,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 14:29:14,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:29:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:29:15,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:29:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 14:29:17,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330394712] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:29:17,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1725231465] [2023-12-02 14:29:17,036 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-12-02 14:29:17,036 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:29:17,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:29:17,037 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:29:17,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:29:30,569 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 14:29:30,571 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 81 for LOIs [2023-12-02 14:29:30,619 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 14:29:30,623 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 165 for LOIs [2023-12-02 14:29:31,607 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 166 for LOIs [2023-12-02 14:29:32,754 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 14:29:32,779 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 159 for LOIs [2023-12-02 14:29:32,975 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 170 for LOIs [2023-12-02 14:29:33,193 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:29:45,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165681#(and (= ~q_req_up~0 1) (exists ((v_~q_req_up~0_101 Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| Int) (v_~q_free~0_105 Int)) (and (or (and (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12|) (<= 0 ~p_dw_pc~0) (<= v_~q_free~0_105 1) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| 1) (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0)) (and (= v_~q_free~0_105 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0))) (or (and (= ~p_dw_st~0 0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| 0))) (exists ((v_~p_dw_pc~0_48 Int) (v_~p_dw_st~0_135 Int)) (and (or (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12|) (= v_~p_dw_st~0_135 1) (<= 0 (+ ~p_last_write~0 2147483648)) (= v_~q_req_up~0_101 1) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| 1) (<= ~p_last_write~0 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)) (= v_~p_dw_pc~0_48 1)) (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12|) (= v_~p_dw_st~0_135 1) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| 1) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)) (= v_~p_dw_pc~0_48 0))) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0)) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_12| 0))))))) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_17| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_17| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_17| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_17| 0)))) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2023-12-02 14:29:45,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:29:45,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:29:45,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2023-12-02 14:29:45,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641497418] [2023-12-02 14:29:45,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:29:45,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-02 14:29:45,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:29:45,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-02 14:29:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=11434, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 14:29:45,774 INFO L87 Difference]: Start difference. First operand 6175 states and 8759 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2023-12-02 14:29:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:57,131 INFO L93 Difference]: Finished difference Result 8459 states and 11461 transitions. [2023-12-02 14:29:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2023-12-02 14:29:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2023-12-02 14:29:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:57,144 INFO L225 Difference]: With dead ends: 8459 [2023-12-02 14:29:57,144 INFO L226 Difference]: Without dead ends: 7388 [2023-12-02 14:29:57,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 314 SyntacticMatches, 9 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27784 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=6817, Invalid=62089, Unknown=0, NotChecked=0, Total=68906 [2023-12-02 14:29:57,156 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 6341 mSDsluCounter, 2467 mSDsCounter, 0 mSdLazyCounter, 5960 mSolverCounterSat, 3317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6341 SdHoareTripleChecker+Valid, 2673 SdHoareTripleChecker+Invalid, 9277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3317 IncrementalHoareTripleChecker+Valid, 5960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:57,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6341 Valid, 2673 Invalid, 9277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3317 Valid, 5960 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-02 14:29:57,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2023-12-02 14:29:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 5991. [2023-12-02 14:29:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5991 states, 4854 states have (on average 1.3998763906056861) internal successors, (6795), 4891 states have internal predecessors, (6795), 728 states have call successors, (728), 385 states have call predecessors, (728), 407 states have return successors, (1018), 716 states have call predecessors, (1018), 727 states have call successors, (1018) [2023-12-02 14:29:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5991 states to 5991 states and 8541 transitions. [2023-12-02 14:29:57,939 INFO L78 Accepts]: Start accepts. Automaton has 5991 states and 8541 transitions. Word has length 124 [2023-12-02 14:29:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:29:57,939 INFO L495 AbstractCegarLoop]: Abstraction has 5991 states and 8541 transitions. [2023-12-02 14:29:57,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2023-12-02 14:29:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5991 states and 8541 transitions. [2023-12-02 14:29:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 14:29:57,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:29:57,949 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:29:57,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 14:29:58,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 14:29:58,150 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:29:58,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:29:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash -327436010, now seen corresponding path program 1 times [2023-12-02 14:29:58,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:29:58,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766637323] [2023-12-02 14:29:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:58,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:29:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 14:29:58,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:29:58,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766637323] [2023-12-02 14:29:58,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766637323] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:29:58,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490586808] [2023-12-02 14:29:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:58,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:29:58,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:29:58,347 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:29:58,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 14:29:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:58,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 14:29:58,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:29:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 14:29:58,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:29:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 14:29:58,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490586808] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:29:58,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:29:58,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2023-12-02 14:29:58,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229703687] [2023-12-02 14:29:58,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:29:58,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:29:58,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:29:58,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:29:58,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:29:58,698 INFO L87 Difference]: Start difference. First operand 5991 states and 8541 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 14:29:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:59,843 INFO L93 Difference]: Finished difference Result 6646 states and 9282 transitions. [2023-12-02 14:29:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 14:29:59,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2023-12-02 14:29:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:59,855 INFO L225 Difference]: With dead ends: 6646 [2023-12-02 14:29:59,855 INFO L226 Difference]: Without dead ends: 5759 [2023-12-02 14:29:59,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-12-02 14:29:59,860 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 536 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:59,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 561 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:29:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5759 states. [2023-12-02 14:30:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5759 to 5722. [2023-12-02 14:30:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 4655 states have (on average 1.4070891514500536) internal successors, (6550), 4692 states have internal predecessors, (6550), 692 states have call successors, (692), 355 states have call predecessors, (692), 373 states have return successors, (977), 676 states have call predecessors, (977), 691 states have call successors, (977) [2023-12-02 14:30:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 8219 transitions. [2023-12-02 14:30:00,509 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 8219 transitions. Word has length 125 [2023-12-02 14:30:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:00,509 INFO L495 AbstractCegarLoop]: Abstraction has 5722 states and 8219 transitions. [2023-12-02 14:30:00,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 14:30:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 8219 transitions. [2023-12-02 14:30:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 14:30:00,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:00,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:30:00,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 14:30:00,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 14:30:00,720 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:00,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash -281077881, now seen corresponding path program 1 times [2023-12-02 14:30:00,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:00,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183963554] [2023-12-02 14:30:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:00,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 14:30:00,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:00,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183963554] [2023-12-02 14:30:00,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183963554] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:00,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:30:00,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:30:00,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264922413] [2023-12-02 14:30:00,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:00,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:00,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:00,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:30:00,790 INFO L87 Difference]: Start difference. First operand 5722 states and 8219 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:30:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:01,969 INFO L93 Difference]: Finished difference Result 15519 states and 23180 transitions. [2023-12-02 14:30:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2023-12-02 14:30:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:01,990 INFO L225 Difference]: With dead ends: 15519 [2023-12-02 14:30:01,990 INFO L226 Difference]: Without dead ends: 10532 [2023-12-02 14:30:02,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:30:02,006 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 236 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:02,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 370 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:30:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10532 states. [2023-12-02 14:30:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10532 to 10474. [2023-12-02 14:30:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10474 states, 8619 states have (on average 1.4115326604014387) internal successors, (12166), 8680 states have internal predecessors, (12166), 1224 states have call successors, (1224), 611 states have call predecessors, (1224), 629 states have return successors, (1733), 1184 states have call predecessors, (1733), 1223 states have call successors, (1733) [2023-12-02 14:30:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10474 states to 10474 states and 15123 transitions. [2023-12-02 14:30:03,145 INFO L78 Accepts]: Start accepts. Automaton has 10474 states and 15123 transitions. Word has length 128 [2023-12-02 14:30:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:03,146 INFO L495 AbstractCegarLoop]: Abstraction has 10474 states and 15123 transitions. [2023-12-02 14:30:03,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:30:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10474 states and 15123 transitions. [2023-12-02 14:30:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 14:30:03,165 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:03,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:30:03,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 14:30:03,165 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:03,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1996256704, now seen corresponding path program 1 times [2023-12-02 14:30:03,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:03,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118809917] [2023-12-02 14:30:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:03,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 14:30:03,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:03,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118809917] [2023-12-02 14:30:03,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118809917] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:03,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:30:03,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:30:03,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000209458] [2023-12-02 14:30:03,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:03,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:03,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:03,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:03,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:30:03,234 INFO L87 Difference]: Start difference. First operand 10474 states and 15123 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:30:05,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:05,148 INFO L93 Difference]: Finished difference Result 29599 states and 43976 transitions. [2023-12-02 14:30:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:05,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2023-12-02 14:30:05,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:05,192 INFO L225 Difference]: With dead ends: 29599 [2023-12-02 14:30:05,192 INFO L226 Difference]: Without dead ends: 19860 [2023-12-02 14:30:05,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:30:05,224 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 239 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:05,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 384 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:30:05,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19860 states. [2023-12-02 14:30:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19860 to 19746. [2023-12-02 14:30:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19746 states, 16355 states have (on average 1.4071537756037908) internal successors, (23014), 16464 states have internal predecessors, (23014), 2248 states have call successors, (2248), 1123 states have call predecessors, (2248), 1141 states have return successors, (3173), 2160 states have call predecessors, (3173), 2247 states have call successors, (3173) [2023-12-02 14:30:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19746 states to 19746 states and 28435 transitions. [2023-12-02 14:30:07,434 INFO L78 Accepts]: Start accepts. Automaton has 19746 states and 28435 transitions. Word has length 128 [2023-12-02 14:30:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:07,434 INFO L495 AbstractCegarLoop]: Abstraction has 19746 states and 28435 transitions. [2023-12-02 14:30:07,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:30:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 19746 states and 28435 transitions. [2023-12-02 14:30:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 14:30:07,472 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:07,472 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:30:07,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 14:30:07,473 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:07,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1295323260, now seen corresponding path program 1 times [2023-12-02 14:30:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431192497] [2023-12-02 14:30:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 14:30:07,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431192497] [2023-12-02 14:30:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431192497] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990254548] [2023-12-02 14:30:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:07,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:07,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:07,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 14:30:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:08,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 14:30:08,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 70 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 14:30:08,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:30:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 14:30:08,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990254548] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:30:08,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007306622] [2023-12-02 14:30:08,571 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2023-12-02 14:30:08,572 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:30:08,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:30:08,572 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:30:08,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:30:33,981 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 78 for LOIs [2023-12-02 14:30:34,047 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 78 for LOIs [2023-12-02 14:30:34,177 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 155 for LOIs [2023-12-02 14:30:34,385 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 114 for LOIs [2023-12-02 14:30:34,776 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 78 for LOIs [2023-12-02 14:30:37,890 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 198 for LOIs [2023-12-02 14:30:38,309 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:31:04,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '294301#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= |ULTIMATE.start_start_simulation2_~tmp~8#1| 1) (<= 1 |#StackHeapBarrier|) (not (= ~E_6~0 1)) (= 0 ~t5_pc~0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| Int)) (and (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| 2147483648)) (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| 2147483647) (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| 0)))) (= ~p_last_write~0 0) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= |ULTIMATE.start_start_simulation2_~tmp___0~4#1| 0) (not (= ~T1_E~0 1)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t6_pc~0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (not (= ~T5_E~0 1)) (not (= ~E_2~0 1)) (= ~q_req_up~0 0) (not (= ~T3_E~0 1)) (not (= ~T2_E~0 1)) (not (= ~E_3~0 1)) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (= ~t6_i~0 1) (= ~p_dw_st~0 0) (not (= ~E_1~0 1)) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (not (= ~M_E~0 1)) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= |ULTIMATE.start_stop_simulation2_#res#1| 0) (= ~m_st~0 1) (not (= ~T4_E~0 1)) (<= ~token~0 2147483647) (= ~t5_i~0 1) (= ~a_t~0 0) (= ~token~0 ~local~0) (not (= ~E_4~0 1)) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (not (= ~E_5~0 1)) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (not (= ~T6_E~0 1)) (= |ULTIMATE.start_eval2_~tmp~5#1| 1) (exists ((|v_ULTIMATE.start_eval2_~tmp~5#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval2_~tmp~5#1_16| 0)) (<= 0 |v_ULTIMATE.start_eval2_~tmp~5#1_16|) (<= |v_ULTIMATE.start_eval2_~tmp~5#1_16| 1))) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (not (= ~E_M~0 1)))' at error location [2023-12-02 14:31:04,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:31:04,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:31:04,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-12-02 14:31:04,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744531097] [2023-12-02 14:31:04,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:31:04,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:31:04,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:04,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:31:04,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3959, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 14:31:04,872 INFO L87 Difference]: Start difference. First operand 19746 states and 28435 transitions. Second operand has 13 states, 13 states have (on average 15.153846153846153) internal successors, (197), 13 states have internal predecessors, (197), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 14:31:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:11,315 INFO L93 Difference]: Finished difference Result 68850 states and 101495 transitions. [2023-12-02 14:31:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 14:31:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.153846153846153) internal successors, (197), 13 states have internal predecessors, (197), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 148 [2023-12-02 14:31:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:11,460 INFO L225 Difference]: With dead ends: 68850 [2023-12-02 14:31:11,460 INFO L226 Difference]: Without dead ends: 49840 [2023-12-02 14:31:11,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 383 SyntacticMatches, 18 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3609 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=912, Invalid=7460, Unknown=0, NotChecked=0, Total=8372 [2023-12-02 14:31:11,583 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 2067 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2067 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:11,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2067 Valid, 1274 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 14:31:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49840 states. [2023-12-02 14:31:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49840 to 44618. [2023-12-02 14:31:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44618 states, 36955 states have (on average 1.3877959680692735) internal successors, (51286), 37208 states have internal predecessors, (51286), 5096 states have call successors, (5096), 2547 states have call predecessors, (5096), 2565 states have return successors, (7349), 4864 states have call predecessors, (7349), 5095 states have call successors, (7349) [2023-12-02 14:31:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44618 states to 44618 states and 63731 transitions. [2023-12-02 14:31:17,323 INFO L78 Accepts]: Start accepts. Automaton has 44618 states and 63731 transitions. Word has length 148 [2023-12-02 14:31:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:17,323 INFO L495 AbstractCegarLoop]: Abstraction has 44618 states and 63731 transitions. [2023-12-02 14:31:17,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.153846153846153) internal successors, (197), 13 states have internal predecessors, (197), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 14:31:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 44618 states and 63731 transitions. [2023-12-02 14:31:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 14:31:17,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:17,404 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:31:17,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 14:31:17,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 14:31:17,605 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:31:17,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1807158901, now seen corresponding path program 1 times [2023-12-02 14:31:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:17,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636360289] [2023-12-02 14:31:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 14:31:17,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:17,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636360289] [2023-12-02 14:31:17,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636360289] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:17,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024706272] [2023-12-02 14:31:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:17,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:17,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:17,712 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:17,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 14:31:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:17,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:31:17,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 14:31:17,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:31:17,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024706272] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:31:17,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:31:17,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 14:31:17,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935136965] [2023-12-02 14:31:17,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:31:17,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:31:17,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:17,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:31:17,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:31:17,961 INFO L87 Difference]: Start difference. First operand 44618 states and 63731 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:31:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:23,973 INFO L93 Difference]: Finished difference Result 88284 states and 126908 transitions. [2023-12-02 14:31:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:31:23,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 153 [2023-12-02 14:31:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:24,236 INFO L225 Difference]: With dead ends: 88284 [2023-12-02 14:31:24,237 INFO L226 Difference]: Without dead ends: 55930 [2023-12-02 14:31:24,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:31:24,302 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 228 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:24,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 287 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:31:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55930 states. [2023-12-02 14:31:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55930 to 54362. [2023-12-02 14:31:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54362 states, 45761 states have (on average 1.3638687965735015) internal successors, (62412), 45966 states have internal predecessors, (62412), 5372 states have call successors, (5372), 3207 states have call predecessors, (5372), 3227 states have return successors, (7759), 5190 states have call predecessors, (7759), 5371 states have call successors, (7759) [2023-12-02 14:31:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54362 states to 54362 states and 75543 transitions. [2023-12-02 14:31:29,779 INFO L78 Accepts]: Start accepts. Automaton has 54362 states and 75543 transitions. Word has length 153 [2023-12-02 14:31:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:29,780 INFO L495 AbstractCegarLoop]: Abstraction has 54362 states and 75543 transitions. [2023-12-02 14:31:29,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:31:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54362 states and 75543 transitions. [2023-12-02 14:31:29,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 14:31:29,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:29,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:31:29,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 14:31:30,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 14:31:30,055 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:31:30,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash 42342292, now seen corresponding path program 1 times [2023-12-02 14:31:30,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:30,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696842390] [2023-12-02 14:31:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:30,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 14:31:30,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:30,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696842390] [2023-12-02 14:31:30,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696842390] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:30,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995429068] [2023-12-02 14:31:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:30,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:30,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:30,156 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:30,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 14:31:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:30,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:31:30,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 14:31:30,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:31:30,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995429068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:31:30,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:31:30,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 14:31:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027477005] [2023-12-02 14:31:30,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:31:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:31:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:31:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:31:30,338 INFO L87 Difference]: Start difference. First operand 54362 states and 75543 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:31:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:37,867 INFO L93 Difference]: Finished difference Result 103386 states and 145631 transitions. [2023-12-02 14:31:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:31:37,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 153 [2023-12-02 14:31:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:38,056 INFO L225 Difference]: With dead ends: 103386 [2023-12-02 14:31:38,056 INFO L226 Difference]: Without dead ends: 76052 [2023-12-02 14:31:38,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:31:38,105 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 115 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:38,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 574 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:31:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76052 states. [2023-12-02 14:31:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76052 to 63434. [2023-12-02 14:31:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63434 states, 54305 states have (on average 1.3849921738329805) internal successors, (75212), 54510 states have internal predecessors, (75212), 5636 states have call successors, (5636), 3471 states have call predecessors, (5636), 3491 states have return successors, (8023), 5454 states have call predecessors, (8023), 5635 states have call successors, (8023) [2023-12-02 14:31:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63434 states to 63434 states and 88871 transitions. [2023-12-02 14:31:45,153 INFO L78 Accepts]: Start accepts. Automaton has 63434 states and 88871 transitions. Word has length 153 [2023-12-02 14:31:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:45,153 INFO L495 AbstractCegarLoop]: Abstraction has 63434 states and 88871 transitions. [2023-12-02 14:31:45,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:31:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 63434 states and 88871 transitions. [2023-12-02 14:31:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 14:31:45,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:45,234 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:31:45,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 14:31:45,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:45,435 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:31:45,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash -602321756, now seen corresponding path program 2 times [2023-12-02 14:31:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:45,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061633251] [2023-12-02 14:31:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 14:31:45,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:45,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061633251] [2023-12-02 14:31:45,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061633251] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:45,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568084021] [2023-12-02 14:31:45,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:31:45,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:45,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:45,659 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:45,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 14:31:45,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 14:31:45,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:31:45,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:31:45,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 14:31:45,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:31:45,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568084021] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:31:45,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:31:45,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 14:31:45,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387650167] [2023-12-02 14:31:45,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:31:45,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:31:45,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:45,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:31:45,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:31:45,821 INFO L87 Difference]: Start difference. First operand 63434 states and 88871 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 14:31:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:52,176 INFO L93 Difference]: Finished difference Result 111731 states and 156620 transitions. [2023-12-02 14:31:52,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:31:52,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 153 [2023-12-02 14:31:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:52,317 INFO L225 Difference]: With dead ends: 111731 [2023-12-02 14:31:52,317 INFO L226 Difference]: Without dead ends: 65893 [2023-12-02 14:31:52,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:31:52,367 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 231 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:52,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 750 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:31:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65893 states. [2023-12-02 14:31:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65893 to 65565. [2023-12-02 14:31:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65565 states, 56231 states have (on average 1.3809464530241327) internal successors, (77652), 56532 states have internal predecessors, (77652), 5644 states have call successors, (5644), 3476 states have call predecessors, (5644), 3688 states have return successors, (8319), 5558 states have call predecessors, (8319), 5643 states have call successors, (8319) [2023-12-02 14:31:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65565 states to 65565 states and 91615 transitions. [2023-12-02 14:31:58,393 INFO L78 Accepts]: Start accepts. Automaton has 65565 states and 91615 transitions. Word has length 153 [2023-12-02 14:31:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:58,393 INFO L495 AbstractCegarLoop]: Abstraction has 65565 states and 91615 transitions. [2023-12-02 14:31:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 14:31:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 65565 states and 91615 transitions. [2023-12-02 14:31:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 14:31:58,474 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:58,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:31:58,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 14:31:58,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:58,675 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:31:58,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1850331749, now seen corresponding path program 2 times [2023-12-02 14:31:58,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:58,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919665406] [2023-12-02 14:31:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:58,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 14:31:58,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919665406] [2023-12-02 14:31:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919665406] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467927457] [2023-12-02 14:31:58,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:31:58,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:58,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:58,876 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:58,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9cceb4-e5b3-42d5-8afc-47feaa2ef8f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 14:31:59,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:31:59,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:31:59,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 14:31:59,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 69 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 14:31:59,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:31:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 14:31:59,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467927457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:31:59,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [802892977] [2023-12-02 14:31:59,454 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2023-12-02 14:31:59,454 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:31:59,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:31:59,455 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:31:59,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:32:10,640 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2023-12-02 14:32:10,826 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-12-02 14:32:11,222 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32768 conjunctions. This might take some time... [2023-12-02 14:38:09,670 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 32768 conjunctions. [2023-12-02 14:38:11,077 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-12-02 14:38:11,433 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32768 conjunctions. This might take some time...