./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire --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 c2172e48d59a79636c380f4fc82a3f737aa7d3f80daa2bd10bb2cc27a12a3e78 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:31:50,052 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:31:50,160 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:31:50,170 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:31:50,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:31:50,213 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:31:50,214 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:31:50,215 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:31:50,216 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:31:50,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:31:50,221 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:31:50,222 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:31:50,222 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:31:50,224 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:31:50,225 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:31:50,225 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:31:50,226 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:31:50,226 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:31:50,227 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:31:50,227 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:31:50,228 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:31:50,228 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:31:50,229 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:31:50,230 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:31:50,230 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:31:50,230 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:31:50,231 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:31:50,231 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:31:50,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:31:50,232 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:31:50,233 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:31:50,233 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:31:50,234 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:31:50,234 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:31:50,234 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:31:50,234 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:31:50,235 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:31:50,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:31:50,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:31:50,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:31:50,236 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:31:50,236 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:31:50,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:31:50,237 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:31:50,237 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:31:50,237 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:31:50,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:31:50,238 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_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2172e48d59a79636c380f4fc82a3f737aa7d3f80daa2bd10bb2cc27a12a3e78 [2023-11-23 20:31:50,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:31:50,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:31:50,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:31:50,537 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:31:50,538 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:31:50,539 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c [2023-11-23 20:31:53,651 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:31:53,962 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:31:53,963 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c [2023-11-23 20:31:53,979 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/data/ab1c82e15/cdde709a50eb4076a3e18da8a04b8392/FLAGab571cfaf [2023-11-23 20:31:53,993 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/data/ab1c82e15/cdde709a50eb4076a3e18da8a04b8392 [2023-11-23 20:31:53,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:31:53,997 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:31:53,999 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:31:53,999 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:31:54,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:31:54,006 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:53" (1/1) ... [2023-11-23 20:31:54,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8982f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54, skipping insertion in model container [2023-11-23 20:31:54,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:53" (1/1) ... [2023-11-23 20:31:54,087 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:31:54,278 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_e815948c-8d54-40d4-8ac3-8a3812bea5b8/sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c[646,659] [2023-11-23 20:31:54,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:31:54,435 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:31:54,447 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_e815948c-8d54-40d4-8ac3-8a3812bea5b8/sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c[646,659] [2023-11-23 20:31:54,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:31:54,563 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:31:54,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54 WrapperNode [2023-11-23 20:31:54,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:31:54,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:31:54,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:31:54,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:31:54,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,648 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 847 [2023-11-23 20:31:54,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:31:54,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:31:54,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:31:54,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:31:54,668 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,673 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,717 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,720 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,723 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,738 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:31:54,743 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:31:54,746 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:31:54,751 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:31:54,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (1/1) ... [2023-11-23 20:31:54,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:31:54,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:54,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:31:54,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:31:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:31:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:31:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-23 20:31:54,833 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-23 20:31:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:31:54,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:31:54,975 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:31:54,977 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:31:55,879 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:31:56,088 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:31:56,088 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-23 20:31:56,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:56 BoogieIcfgContainer [2023-11-23 20:31:56,090 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:31:56,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:31:56,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:31:56,099 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:31:56,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:31:53" (1/3) ... [2023-11-23 20:31:56,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122eff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:56, skipping insertion in model container [2023-11-23 20:31:56,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:54" (2/3) ... [2023-11-23 20:31:56,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122eff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:56, skipping insertion in model container [2023-11-23 20:31:56,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:56" (3/3) ... [2023-11-23 20:31:56,104 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.1.cil.c [2023-11-23 20:31:56,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:31:56,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:31:56,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:31:56,185 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;@4779e00b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:31:56,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:31:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 217 states have (on average 1.7788018433179724) internal successors, (386), 223 states have internal predecessors, (386), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 20:31:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 20:31:56,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:56,212 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] [2023-11-23 20:31:56,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:56,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:56,220 INFO L85 PathProgramCache]: Analyzing trace with hash -256073483, now seen corresponding path program 1 times [2023-11-23 20:31:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:56,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804232460] [2023-11-23 20:31:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:56,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:56,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804232460] [2023-11-23 20:31:56,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804232460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:56,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:56,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:31:56,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72498756] [2023-11-23 20:31:56,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:56,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:31:56,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:56,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:31:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:56,552 INFO L87 Difference]: Start difference. First operand has 225 states, 217 states have (on average 1.7788018433179724) internal successors, (386), 223 states have internal predecessors, (386), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:57,069 INFO L93 Difference]: Finished difference Result 600 states and 1046 transitions. [2023-11-23 20:31:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:31:57,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-23 20:31:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:57,095 INFO L225 Difference]: With dead ends: 600 [2023-11-23 20:31:57,095 INFO L226 Difference]: Without dead ends: 373 [2023-11-23 20:31:57,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:57,105 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 207 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:57,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 541 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:31:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-23 20:31:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 366. [2023-11-23 20:31:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 360 states have (on average 1.525) internal successors, (549), 364 states have internal predecessors, (549), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 554 transitions. [2023-11-23 20:31:57,196 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 554 transitions. Word has length 24 [2023-11-23 20:31:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:57,197 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 554 transitions. [2023-11-23 20:31:57,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 554 transitions. [2023-11-23 20:31:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 20:31:57,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:57,207 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] [2023-11-23 20:31:57,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:31:57,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:57,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash -555380237, now seen corresponding path program 1 times [2023-11-23 20:31:57,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:57,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150329712] [2023-11-23 20:31:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:57,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:57,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150329712] [2023-11-23 20:31:57,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150329712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:57,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:57,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:31:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112731092] [2023-11-23 20:31:57,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:57,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:31:57,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:31:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:57,321 INFO L87 Difference]: Start difference. First operand 366 states and 554 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:57,551 INFO L93 Difference]: Finished difference Result 949 states and 1462 transitions. [2023-11-23 20:31:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:31:57,551 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-23 20:31:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:57,556 INFO L225 Difference]: With dead ends: 949 [2023-11-23 20:31:57,556 INFO L226 Difference]: Without dead ends: 593 [2023-11-23 20:31:57,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:57,568 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 259 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:57,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 717 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:31:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-11-23 20:31:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 586. [2023-11-23 20:31:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 580 states have (on average 1.5586206896551724) internal successors, (904), 584 states have internal predecessors, (904), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 909 transitions. [2023-11-23 20:31:57,614 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 909 transitions. Word has length 33 [2023-11-23 20:31:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:57,615 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 909 transitions. [2023-11-23 20:31:57,616 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 909 transitions. [2023-11-23 20:31:57,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 20:31:57,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:57,618 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] [2023-11-23 20:31:57,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:31:57,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:57,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:57,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1623462148, now seen corresponding path program 1 times [2023-11-23 20:31:57,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:57,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409270485] [2023-11-23 20:31:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:57,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409270485] [2023-11-23 20:31:57,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409270485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:57,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:57,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:31:57,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654786906] [2023-11-23 20:31:57,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:57,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:31:57,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:57,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:31:57,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:57,746 INFO L87 Difference]: Start difference. First operand 586 states and 909 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:57,906 INFO L93 Difference]: Finished difference Result 1498 states and 2332 transitions. [2023-11-23 20:31:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:31:57,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-23 20:31:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:57,917 INFO L225 Difference]: With dead ends: 1498 [2023-11-23 20:31:57,918 INFO L226 Difference]: Without dead ends: 922 [2023-11-23 20:31:57,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:57,920 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 281 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:57,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 585 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2023-11-23 20:31:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 911. [2023-11-23 20:31:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 905 states have (on average 1.558011049723757) internal successors, (1410), 909 states have internal predecessors, (1410), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1415 transitions. [2023-11-23 20:31:57,957 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1415 transitions. Word has length 34 [2023-11-23 20:31:57,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:57,958 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1415 transitions. [2023-11-23 20:31:57,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1415 transitions. [2023-11-23 20:31:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 20:31:57,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:57,960 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:57,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:31:57,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:57,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1424366852, now seen corresponding path program 1 times [2023-11-23 20:31:57,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:57,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284736726] [2023-11-23 20:31:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:57,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:58,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:58,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284736726] [2023-11-23 20:31:58,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284736726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:58,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:58,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:31:58,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744712144] [2023-11-23 20:31:58,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:58,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:31:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:58,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:31:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:31:58,082 INFO L87 Difference]: Start difference. First operand 911 states and 1415 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:58,731 INFO L93 Difference]: Finished difference Result 3250 states and 5063 transitions. [2023-11-23 20:31:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:31:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-23 20:31:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:58,746 INFO L225 Difference]: With dead ends: 3250 [2023-11-23 20:31:58,746 INFO L226 Difference]: Without dead ends: 2349 [2023-11-23 20:31:58,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:58,749 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 926 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:58,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 1127 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:31:58,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2023-11-23 20:31:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1903. [2023-11-23 20:31:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1897 states have (on average 1.5561412756984712) internal successors, (2952), 1901 states have internal predecessors, (2952), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2957 transitions. [2023-11-23 20:31:58,836 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2957 transitions. Word has length 41 [2023-11-23 20:31:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:58,837 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 2957 transitions. [2023-11-23 20:31:58,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2957 transitions. [2023-11-23 20:31:58,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 20:31:58,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:58,839 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] [2023-11-23 20:31:58,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:31:58,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:58,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1413187439, now seen corresponding path program 1 times [2023-11-23 20:31:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:58,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603314005] [2023-11-23 20:31:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:58,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:58,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603314005] [2023-11-23 20:31:58,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603314005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:58,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:58,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:31:58,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245064558] [2023-11-23 20:31:58,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:58,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:31:58,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:58,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:31:58,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:31:58,923 INFO L87 Difference]: Start difference. First operand 1903 states and 2957 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:59,524 INFO L93 Difference]: Finished difference Result 5655 states and 8687 transitions. [2023-11-23 20:31:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:31:59,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-23 20:31:59,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:59,547 INFO L225 Difference]: With dead ends: 5655 [2023-11-23 20:31:59,547 INFO L226 Difference]: Without dead ends: 3760 [2023-11-23 20:31:59,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:59,551 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 575 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:59,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 789 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:31:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2023-11-23 20:31:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3428. [2023-11-23 20:31:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3422 states have (on average 1.5254237288135593) internal successors, (5220), 3426 states have internal predecessors, (5220), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 5225 transitions. [2023-11-23 20:31:59,756 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 5225 transitions. Word has length 48 [2023-11-23 20:31:59,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:59,758 INFO L495 AbstractCegarLoop]: Abstraction has 3428 states and 5225 transitions. [2023-11-23 20:31:59,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 5225 transitions. [2023-11-23 20:31:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 20:31:59,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:59,760 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] [2023-11-23 20:31:59,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:31:59,761 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:59,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:59,761 INFO L85 PathProgramCache]: Analyzing trace with hash -619234552, now seen corresponding path program 1 times [2023-11-23 20:31:59,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:59,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705924146] [2023-11-23 20:31:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:59,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:59,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:59,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705924146] [2023-11-23 20:31:59,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705924146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:59,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:59,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:31:59,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933001479] [2023-11-23 20:31:59,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:59,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:31:59,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:31:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:59,834 INFO L87 Difference]: Start difference. First operand 3428 states and 5225 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:00,114 INFO L93 Difference]: Finished difference Result 8157 states and 12398 transitions. [2023-11-23 20:32:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:00,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-23 20:32:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:00,141 INFO L225 Difference]: With dead ends: 8157 [2023-11-23 20:32:00,141 INFO L226 Difference]: Without dead ends: 4738 [2023-11-23 20:32:00,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:00,148 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 290 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:00,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 504 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2023-11-23 20:32:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 4476. [2023-11-23 20:32:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4470 states have (on average 1.508724832214765) internal successors, (6744), 4474 states have internal predecessors, (6744), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:00,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 6749 transitions. [2023-11-23 20:32:00,419 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 6749 transitions. Word has length 48 [2023-11-23 20:32:00,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:00,420 INFO L495 AbstractCegarLoop]: Abstraction has 4476 states and 6749 transitions. [2023-11-23 20:32:00,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:00,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 6749 transitions. [2023-11-23 20:32:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 20:32:00,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:00,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:00,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:32:00,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:00,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1749095310, now seen corresponding path program 1 times [2023-11-23 20:32:00,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:00,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455986670] [2023-11-23 20:32:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:00,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:00,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:00,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455986670] [2023-11-23 20:32:00,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455986670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:00,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:00,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:00,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051912364] [2023-11-23 20:32:00,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:00,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:00,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:00,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:00,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:00,526 INFO L87 Difference]: Start difference. First operand 4476 states and 6749 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:01,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:01,073 INFO L93 Difference]: Finished difference Result 10858 states and 16379 transitions. [2023-11-23 20:32:01,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:01,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-23 20:32:01,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:01,109 INFO L225 Difference]: With dead ends: 10858 [2023-11-23 20:32:01,109 INFO L226 Difference]: Without dead ends: 6391 [2023-11-23 20:32:01,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:01,116 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 202 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:01,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 601 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:32:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2023-11-23 20:32:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 5191. [2023-11-23 20:32:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5191 states, 5185 states have (on average 1.452844744455159) internal successors, (7533), 5189 states have internal predecessors, (7533), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 7538 transitions. [2023-11-23 20:32:01,357 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 7538 transitions. Word has length 52 [2023-11-23 20:32:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:01,360 INFO L495 AbstractCegarLoop]: Abstraction has 5191 states and 7538 transitions. [2023-11-23 20:32:01,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 7538 transitions. [2023-11-23 20:32:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:32:01,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:01,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:01,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:32:01,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:01,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash -423105210, now seen corresponding path program 1 times [2023-11-23 20:32:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:01,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596749222] [2023-11-23 20:32:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:01,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:01,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:01,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596749222] [2023-11-23 20:32:01,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596749222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:01,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:01,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:32:01,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969942823] [2023-11-23 20:32:01,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:01,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:01,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:01,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:01,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:01,490 INFO L87 Difference]: Start difference. First operand 5191 states and 7538 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:01,777 INFO L93 Difference]: Finished difference Result 10248 states and 14910 transitions. [2023-11-23 20:32:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-23 20:32:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:01,807 INFO L225 Difference]: With dead ends: 10248 [2023-11-23 20:32:01,807 INFO L226 Difference]: Without dead ends: 5066 [2023-11-23 20:32:01,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:01,815 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 275 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:01,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 322 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2023-11-23 20:32:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 5066. [2023-11-23 20:32:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 5060 states have (on average 1.4478260869565218) internal successors, (7326), 5064 states have internal predecessors, (7326), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 7331 transitions. [2023-11-23 20:32:02,033 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 7331 transitions. Word has length 54 [2023-11-23 20:32:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:02,034 INFO L495 AbstractCegarLoop]: Abstraction has 5066 states and 7331 transitions. [2023-11-23 20:32:02,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 7331 transitions. [2023-11-23 20:32:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:32:02,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:02,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:02,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:32:02,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:02,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1141505771, now seen corresponding path program 1 times [2023-11-23 20:32:02,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:02,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943310447] [2023-11-23 20:32:02,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:02,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:02,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:02,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943310447] [2023-11-23 20:32:02,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943310447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:02,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:02,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:02,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139374464] [2023-11-23 20:32:02,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:02,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:02,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:02,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:02,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:02,158 INFO L87 Difference]: Start difference. First operand 5066 states and 7331 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:02,464 INFO L93 Difference]: Finished difference Result 9672 states and 14117 transitions. [2023-11-23 20:32:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:02,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-23 20:32:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:02,484 INFO L225 Difference]: With dead ends: 9672 [2023-11-23 20:32:02,485 INFO L226 Difference]: Without dead ends: 4615 [2023-11-23 20:32:02,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:02,493 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 130 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:02,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 661 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:02,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2023-11-23 20:32:02,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 3989. [2023-11-23 20:32:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3989 states, 3983 states have (on average 1.4757720311323124) internal successors, (5878), 3987 states have internal predecessors, (5878), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3989 states to 3989 states and 5883 transitions. [2023-11-23 20:32:02,665 INFO L78 Accepts]: Start accepts. Automaton has 3989 states and 5883 transitions. Word has length 55 [2023-11-23 20:32:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:02,665 INFO L495 AbstractCegarLoop]: Abstraction has 3989 states and 5883 transitions. [2023-11-23 20:32:02,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3989 states and 5883 transitions. [2023-11-23 20:32:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 20:32:02,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:02,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:02,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:32:02,668 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:02,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:02,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1460816998, now seen corresponding path program 1 times [2023-11-23 20:32:02,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:02,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102251691] [2023-11-23 20:32:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:02,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:02,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:02,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102251691] [2023-11-23 20:32:02,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102251691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:02,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:02,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:32:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710986128] [2023-11-23 20:32:02,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:02,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:32:02,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:32:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:32:02,794 INFO L87 Difference]: Start difference. First operand 3989 states and 5883 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:03,571 INFO L93 Difference]: Finished difference Result 11907 states and 17520 transitions. [2023-11-23 20:32:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:32:03,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-23 20:32:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:03,598 INFO L225 Difference]: With dead ends: 11907 [2023-11-23 20:32:03,598 INFO L226 Difference]: Without dead ends: 7991 [2023-11-23 20:32:03,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:32:03,607 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 761 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:03,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1707 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:32:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7991 states. [2023-11-23 20:32:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7991 to 5447. [2023-11-23 20:32:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5447 states, 5441 states have (on average 1.476199228083073) internal successors, (8032), 5445 states have internal predecessors, (8032), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5447 states to 5447 states and 8037 transitions. [2023-11-23 20:32:03,898 INFO L78 Accepts]: Start accepts. Automaton has 5447 states and 8037 transitions. Word has length 57 [2023-11-23 20:32:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:03,898 INFO L495 AbstractCegarLoop]: Abstraction has 5447 states and 8037 transitions. [2023-11-23 20:32:03,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5447 states and 8037 transitions. [2023-11-23 20:32:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:32:03,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:03,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:03,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:32:03,901 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:03,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:03,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1948187994, now seen corresponding path program 1 times [2023-11-23 20:32:03,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:03,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836077883] [2023-11-23 20:32:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:03,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:04,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:04,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836077883] [2023-11-23 20:32:04,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836077883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:04,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:04,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:32:04,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352629903] [2023-11-23 20:32:04,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:04,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:32:04,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:04,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:32:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:32:04,006 INFO L87 Difference]: Start difference. First operand 5447 states and 8037 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:04,586 INFO L93 Difference]: Finished difference Result 7965 states and 11607 transitions. [2023-11-23 20:32:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:32:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-23 20:32:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:04,604 INFO L225 Difference]: With dead ends: 7965 [2023-11-23 20:32:04,605 INFO L226 Difference]: Without dead ends: 7962 [2023-11-23 20:32:04,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-23 20:32:04,608 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 704 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:04,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 2181 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:32:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2023-11-23 20:32:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 5775. [2023-11-23 20:32:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5769 states have (on average 1.4661119778124458) internal successors, (8458), 5773 states have internal predecessors, (8458), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 8463 transitions. [2023-11-23 20:32:04,944 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 8463 transitions. Word has length 58 [2023-11-23 20:32:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:04,944 INFO L495 AbstractCegarLoop]: Abstraction has 5775 states and 8463 transitions. [2023-11-23 20:32:04,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 8463 transitions. [2023-11-23 20:32:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-23 20:32:04,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:04,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:04,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 20:32:04,948 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:04,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -476561684, now seen corresponding path program 1 times [2023-11-23 20:32:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:04,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491978561] [2023-11-23 20:32:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:04,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:04,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491978561] [2023-11-23 20:32:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491978561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:04,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:04,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:32:04,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119800229] [2023-11-23 20:32:04,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:04,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:04,994 INFO L87 Difference]: Start difference. First operand 5775 states and 8463 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:05,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:05,388 INFO L93 Difference]: Finished difference Result 12231 states and 17872 transitions. [2023-11-23 20:32:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:05,389 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-11-23 20:32:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:05,404 INFO L225 Difference]: With dead ends: 12231 [2023-11-23 20:32:05,404 INFO L226 Difference]: Without dead ends: 6474 [2023-11-23 20:32:05,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:05,413 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 114 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:05,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 608 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2023-11-23 20:32:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 5826. [2023-11-23 20:32:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5826 states, 5820 states have (on average 1.463230240549828) internal successors, (8516), 5824 states have internal predecessors, (8516), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5826 states to 5826 states and 8521 transitions. [2023-11-23 20:32:05,735 INFO L78 Accepts]: Start accepts. Automaton has 5826 states and 8521 transitions. Word has length 72 [2023-11-23 20:32:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:05,735 INFO L495 AbstractCegarLoop]: Abstraction has 5826 states and 8521 transitions. [2023-11-23 20:32:05,735 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5826 states and 8521 transitions. [2023-11-23 20:32:05,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 20:32:05,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:05,743 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:05,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 20:32:05,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:05,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 397286876, now seen corresponding path program 1 times [2023-11-23 20:32:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:05,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775991060] [2023-11-23 20:32:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:05,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:05,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:05,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775991060] [2023-11-23 20:32:05,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775991060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:05,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:05,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:32:05,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717531582] [2023-11-23 20:32:05,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:05,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:32:05,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:05,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:32:05,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:32:05,829 INFO L87 Difference]: Start difference. First operand 5826 states and 8521 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:06,552 INFO L93 Difference]: Finished difference Result 13399 states and 19535 transitions. [2023-11-23 20:32:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:32:06,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-23 20:32:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:06,569 INFO L225 Difference]: With dead ends: 13399 [2023-11-23 20:32:06,570 INFO L226 Difference]: Without dead ends: 7583 [2023-11-23 20:32:06,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:06,576 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 331 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:06,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 874 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:32:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2023-11-23 20:32:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 6722. [2023-11-23 20:32:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6716 states have (on average 1.447885646217987) internal successors, (9724), 6720 states have internal predecessors, (9724), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 9729 transitions. [2023-11-23 20:32:06,918 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 9729 transitions. Word has length 83 [2023-11-23 20:32:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:06,919 INFO L495 AbstractCegarLoop]: Abstraction has 6722 states and 9729 transitions. [2023-11-23 20:32:06,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 9729 transitions. [2023-11-23 20:32:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 20:32:06,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:06,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:06,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 20:32:06,922 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:06,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash 572070225, now seen corresponding path program 1 times [2023-11-23 20:32:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:06,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309199064] [2023-11-23 20:32:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:06,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309199064] [2023-11-23 20:32:06,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309199064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:06,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:06,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:06,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714781934] [2023-11-23 20:32:06,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:06,994 INFO L87 Difference]: Start difference. First operand 6722 states and 9729 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:07,290 INFO L93 Difference]: Finished difference Result 9800 states and 14276 transitions. [2023-11-23 20:32:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-23 20:32:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:07,298 INFO L225 Difference]: With dead ends: 9800 [2023-11-23 20:32:07,298 INFO L226 Difference]: Without dead ends: 3117 [2023-11-23 20:32:07,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:07,306 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 296 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:07,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 436 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2023-11-23 20:32:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 3087. [2023-11-23 20:32:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 3081 states have (on average 1.3924050632911393) internal successors, (4290), 3085 states have internal predecessors, (4290), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 4295 transitions. [2023-11-23 20:32:07,454 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 4295 transitions. Word has length 89 [2023-11-23 20:32:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:07,455 INFO L495 AbstractCegarLoop]: Abstraction has 3087 states and 4295 transitions. [2023-11-23 20:32:07,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 4295 transitions. [2023-11-23 20:32:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-23 20:32:07,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:07,457 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:07,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 20:32:07,457 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:07,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:07,458 INFO L85 PathProgramCache]: Analyzing trace with hash 277007944, now seen corresponding path program 1 times [2023-11-23 20:32:07,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:07,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041201924] [2023-11-23 20:32:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:07,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:07,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:07,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041201924] [2023-11-23 20:32:07,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041201924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:07,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:07,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:32:07,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048182828] [2023-11-23 20:32:07,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:07,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:07,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:07,538 INFO L87 Difference]: Start difference. First operand 3087 states and 4295 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:08,049 INFO L93 Difference]: Finished difference Result 7367 states and 10248 transitions. [2023-11-23 20:32:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:32:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-11-23 20:32:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:08,060 INFO L225 Difference]: With dead ends: 7367 [2023-11-23 20:32:08,060 INFO L226 Difference]: Without dead ends: 4418 [2023-11-23 20:32:08,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:32:08,065 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 488 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:08,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1798 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:32:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2023-11-23 20:32:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 3089. [2023-11-23 20:32:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3083 states have (on average 1.3882581900746027) internal successors, (4280), 3087 states have internal predecessors, (4280), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 4285 transitions. [2023-11-23 20:32:08,317 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 4285 transitions. Word has length 93 [2023-11-23 20:32:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:08,318 INFO L495 AbstractCegarLoop]: Abstraction has 3089 states and 4285 transitions. [2023-11-23 20:32:08,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 4285 transitions. [2023-11-23 20:32:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 20:32:08,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:08,321 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:08,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 20:32:08,321 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:08,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:08,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1534236093, now seen corresponding path program 1 times [2023-11-23 20:32:08,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:08,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555058361] [2023-11-23 20:32:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:08,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:08,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:08,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555058361] [2023-11-23 20:32:08,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555058361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:08,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207923343] [2023-11-23 20:32:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:08,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:08,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:08,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:08,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:32:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:08,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:32:08,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:32:08,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:32:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207923343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:08,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:32:08,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-23 20:32:08,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44734981] [2023-11-23 20:32:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:08,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:08,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:32:08,769 INFO L87 Difference]: Start difference. First operand 3089 states and 4285 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:09,123 INFO L93 Difference]: Finished difference Result 3897 states and 5394 transitions. [2023-11-23 20:32:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:09,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-11-23 20:32:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:09,134 INFO L225 Difference]: With dead ends: 3897 [2023-11-23 20:32:09,134 INFO L226 Difference]: Without dead ends: 3893 [2023-11-23 20:32:09,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:32:09,137 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 197 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:09,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 608 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2023-11-23 20:32:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3804. [2023-11-23 20:32:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3798 states have (on average 1.3915218536071616) internal successors, (5285), 3802 states have internal predecessors, (5285), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 5290 transitions. [2023-11-23 20:32:09,390 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 5290 transitions. Word has length 95 [2023-11-23 20:32:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:09,390 INFO L495 AbstractCegarLoop]: Abstraction has 3804 states and 5290 transitions. [2023-11-23 20:32:09,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 5290 transitions. [2023-11-23 20:32:09,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 20:32:09,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:09,394 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:09,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:09,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 20:32:09,620 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:09,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1661751601, now seen corresponding path program 1 times [2023-11-23 20:32:09,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:09,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576462856] [2023-11-23 20:32:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:09,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:09,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576462856] [2023-11-23 20:32:09,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576462856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652069615] [2023-11-23 20:32:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:09,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:09,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:09,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:09,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:32:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:09,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:32:09,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:32:10,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:32:10,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652069615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:10,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:32:10,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-23 20:32:10,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809553276] [2023-11-23 20:32:10,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:10,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:10,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:10,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:32:10,012 INFO L87 Difference]: Start difference. First operand 3804 states and 5290 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:10,283 INFO L93 Difference]: Finished difference Result 7448 states and 10402 transitions. [2023-11-23 20:32:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-23 20:32:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:10,293 INFO L225 Difference]: With dead ends: 7448 [2023-11-23 20:32:10,293 INFO L226 Difference]: Without dead ends: 3804 [2023-11-23 20:32:10,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:32:10,299 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 226 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:10,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 329 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:10,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3804 states. [2023-11-23 20:32:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3804 to 3804. [2023-11-23 20:32:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3798 states have (on average 1.3599262769878884) internal successors, (5165), 3802 states have internal predecessors, (5165), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 5170 transitions. [2023-11-23 20:32:10,530 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 5170 transitions. Word has length 145 [2023-11-23 20:32:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:10,530 INFO L495 AbstractCegarLoop]: Abstraction has 3804 states and 5170 transitions. [2023-11-23 20:32:10,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 5170 transitions. [2023-11-23 20:32:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-23 20:32:10,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:10,534 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:10,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:10,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:10,755 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:10,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1744055578, now seen corresponding path program 1 times [2023-11-23 20:32:10,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:10,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672540110] [2023-11-23 20:32:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:10,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:32:10,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672540110] [2023-11-23 20:32:10,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672540110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:10,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:10,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:10,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923402463] [2023-11-23 20:32:10,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:10,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:10,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:10,865 INFO L87 Difference]: Start difference. First operand 3804 states and 5170 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:11,097 INFO L93 Difference]: Finished difference Result 4530 states and 6099 transitions. [2023-11-23 20:32:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:11,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2023-11-23 20:32:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:11,100 INFO L225 Difference]: With dead ends: 4530 [2023-11-23 20:32:11,100 INFO L226 Difference]: Without dead ends: 752 [2023-11-23 20:32:11,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:11,105 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 120 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:11,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 308 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:32:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-11-23 20:32:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 731. [2023-11-23 20:32:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 727 states have (on average 1.123796423658872) internal successors, (817), 729 states have internal predecessors, (817), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 820 transitions. [2023-11-23 20:32:11,192 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 820 transitions. Word has length 148 [2023-11-23 20:32:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:11,193 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 820 transitions. [2023-11-23 20:32:11,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 820 transitions. [2023-11-23 20:32:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-23 20:32:11,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:11,196 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:11,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 20:32:11,197 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:11,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:11,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1107488258, now seen corresponding path program 1 times [2023-11-23 20:32:11,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:11,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290232101] [2023-11-23 20:32:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:11,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:32:11,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:11,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290232101] [2023-11-23 20:32:11,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290232101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:11,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371745741] [2023-11-23 20:32:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:11,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:11,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:11,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:11,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:32:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:11,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:32:11,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:32:11,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:32:11,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371745741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:11,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:32:11,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-23 20:32:11,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115352368] [2023-11-23 20:32:11,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:11,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:11,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:32:11,704 INFO L87 Difference]: Start difference. First operand 731 states and 820 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:11,827 INFO L93 Difference]: Finished difference Result 1077 states and 1211 transitions. [2023-11-23 20:32:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:32:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-11-23 20:32:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:11,830 INFO L225 Difference]: With dead ends: 1077 [2023-11-23 20:32:11,830 INFO L226 Difference]: Without dead ends: 612 [2023-11-23 20:32:11,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:32:11,831 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 212 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:11,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 422 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:11,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-11-23 20:32:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2023-11-23 20:32:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 608 states have (on average 1.1217105263157894) internal successors, (682), 610 states have internal predecessors, (682), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 685 transitions. [2023-11-23 20:32:11,873 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 685 transitions. Word has length 151 [2023-11-23 20:32:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:11,874 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 685 transitions. [2023-11-23 20:32:11,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 685 transitions. [2023-11-23 20:32:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-23 20:32:11,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:11,877 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:11,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:12,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:12,091 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:12,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:12,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2015156706, now seen corresponding path program 1 times [2023-11-23 20:32:12,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:12,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204172695] [2023-11-23 20:32:12,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:12,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:32:12,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:12,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204172695] [2023-11-23 20:32:12,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204172695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:12,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:12,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:32:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336244368] [2023-11-23 20:32:12,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:32:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:12,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:32:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:32:12,311 INFO L87 Difference]: Start difference. First operand 612 states and 685 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:12,556 INFO L93 Difference]: Finished difference Result 629 states and 701 transitions. [2023-11-23 20:32:12,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:32:12,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2023-11-23 20:32:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:12,558 INFO L225 Difference]: With dead ends: 629 [2023-11-23 20:32:12,559 INFO L226 Difference]: Without dead ends: 626 [2023-11-23 20:32:12,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:32:12,560 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 199 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:12,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1063 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-23 20:32:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 611. [2023-11-23 20:32:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 608 states have (on average 1.118421052631579) internal successors, (680), 609 states have internal predecessors, (680), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 682 transitions. [2023-11-23 20:32:12,615 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 682 transitions. Word has length 152 [2023-11-23 20:32:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:12,616 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 682 transitions. [2023-11-23 20:32:12,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 682 transitions. [2023-11-23 20:32:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-23 20:32:12,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:12,619 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:12,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-23 20:32:12,619 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:12,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1965776878, now seen corresponding path program 1 times [2023-11-23 20:32:12,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:12,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439189617] [2023-11-23 20:32:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:12,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:32:12,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:12,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439189617] [2023-11-23 20:32:12,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439189617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:12,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:12,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:32:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991826737] [2023-11-23 20:32:12,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:12,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:12,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:12,751 INFO L87 Difference]: Start difference. First operand 611 states and 682 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:12,908 INFO L93 Difference]: Finished difference Result 730 states and 811 transitions. [2023-11-23 20:32:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:32:12,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2023-11-23 20:32:12,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:12,911 INFO L225 Difference]: With dead ends: 730 [2023-11-23 20:32:12,911 INFO L226 Difference]: Without dead ends: 613 [2023-11-23 20:32:12,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:32:12,912 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 143 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:12,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 670 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2023-11-23 20:32:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 604. [2023-11-23 20:32:12,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 602 states have (on average 1.1096345514950166) internal successors, (668), 602 states have internal predecessors, (668), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 669 transitions. [2023-11-23 20:32:12,954 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 669 transitions. Word has length 153 [2023-11-23 20:32:12,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:12,954 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 669 transitions. [2023-11-23 20:32:12,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:12,955 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 669 transitions. [2023-11-23 20:32:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-23 20:32:12,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:12,960 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:12,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-23 20:32:12,961 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:12,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1016754333, now seen corresponding path program 1 times [2023-11-23 20:32:12,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:12,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523984920] [2023-11-23 20:32:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:12,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:14,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:14,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523984920] [2023-11-23 20:32:14,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523984920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:14,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947481344] [2023-11-23 20:32:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:14,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:14,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:14,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:14,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815948c-8d54-40d4-8ac3-8a3812bea5b8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:32:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:14,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-23 20:32:14,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:14,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:32:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:15,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947481344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:32:15,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968009059] [2023-11-23 20:32:15,377 INFO L159 IcfgInterpreter]: Started Sifa with 156 locations of interest [2023-11-23 20:32:15,378 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:32:15,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:32:15,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:32:15,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs